CN106179201B - A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal - Google Patents
A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal Download PDFInfo
- Publication number
- CN106179201B CN106179201B CN201610524096.0A CN201610524096A CN106179201B CN 106179201 B CN106179201 B CN 106179201B CN 201610524096 A CN201610524096 A CN 201610524096A CN 106179201 B CN106179201 B CN 106179201B
- Authority
- CN
- China
- Prior art keywords
- sludge
- hydroxysulfate
- iron
- arsenic
- ferric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 110
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003610 charcoal Substances 0.000 title 1
- MRHOGENDULNOAC-UHFFFAOYSA-K iron(3+);hydroxide;sulfate Chemical compound [OH-].[Fe+3].[O-]S([O-])(=O)=O MRHOGENDULNOAC-UHFFFAOYSA-K 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 35
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003463 adsorbent Substances 0.000 claims abstract description 10
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 claims abstract description 7
- 238000000197 pyrolysis Methods 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000011081 inoculation Methods 0.000 claims description 4
- 239000002054 inoculum Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000011085 pressure filtration Methods 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000005273 aeration Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 6
- 239000011707 mineral Substances 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 239000010865 sewage Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229940116007 ferrous phosphate Drugs 0.000 description 3
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 3
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 235000013601 eggs Nutrition 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 244000045947 parasite Species 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
一种羟基硫酸铁污泥基生物炭的制备方法，包括以下步骤:1)用硫酸调节普通市政污泥溶液pH，使污泥中內源铁析出；2)向上述污泥中接入嗜酸性氧化亚铁硫杆菌，在一定的反应条件下，嗜酸性氧化亚铁硫杆菌利用污泥中的內源铁形成羟基硫酸铁污泥；3)将上述羟基硫酸铁污泥进行脱水后干燥；4)将上述干燥污泥研磨过筛，过筛后污泥在N2保护下热解。热解形成的羟基硫酸铁污泥基生物炭含有施氏矿物，施氏矿物对砷有高效的专性吸附作用。本发明的优点是：该方法利用污泥內源铁生成羟基硫酸铁，节约了成本；制备的羟基硫酸铁污泥基生物炭可高效的专性吸附污泥中的砷，实现了污泥的资源化利用，而且提供了一种新的砷吸附剂。
A preparation method of ferric hydroxysulfate sludge-based biochar, comprising the following steps: 1) adjusting the pH of common municipal sludge solution with sulfuric acid, so that endogenous iron in the sludge is separated out; 2) adding acidophilic acid to the above sludge Thiobacillus ferrooxidans, under certain reaction conditions, acidophilic Thiobacillus ferrooxidans utilizes the endogenous iron in the sludge to form iron hydroxysulfate sludge; 3) dehydrating and drying the above iron hydroxysulfate sludge; 4 ) Grind and sieve the above-mentioned dried sludge, and after sieving, the sludge is pyrolyzed under the protection of N2 . Ferric hydroxysulfate sludge-based biochar formed by pyrolysis contains schizite minerals, which have efficient and specific adsorption on arsenic. The advantages of the present invention are: the method utilizes the endogenous iron in the sludge to generate ferric hydroxysulfate, which saves cost; the prepared ferric hydroxysulfate sludge-based biochar can efficiently and exclusively adsorb arsenic in the sludge, realizing the sludge resource utilization, and provides a new arsenic adsorbent.
Description
技术领域technical field
本发明属于生物质加工领域，具体而言，涉及一种羟基硫酸铁污泥基生物炭的制备方法及应用。The invention belongs to the field of biomass processing, and in particular relates to a preparation method and application of ferric hydroxysulfate sludge-based biochar.
背景技术Background technique
市政污泥是城市污水厂净化污水过程物质转移所形成的固态、半固态废弃物，是污水处理的必然产物。截至2014年，全国日处理污水量1.53亿m3/d，日产生含水率80％的污泥超过3000万吨，这一数字还在继续增长。砷是对人体及其他生物体有毒害作用的致癌物质。矿山开采，含砷工业三废的排放等都会引起砷污染。环境中的砷可通过食物链、饮用水或直接接触进入人体并对人体的健康造成危害。Municipal sludge is solid and semi-solid waste formed during the process of purifying sewage in urban sewage plants, and is an inevitable product of sewage treatment. As of 2014, the country's daily sewage treatment volume was 153 million m 3 /d, and the daily generation of sludge with a moisture content of 80% exceeded 30 million tons, and this figure is still growing. Arsenic is a carcinogen that is toxic to the human body and other organisms. Mine mining, discharge of arsenic-containing industrial wastes, etc. will all cause arsenic pollution. Arsenic in the environment can enter the human body through the food chain, drinking water or direct contact and cause harm to human health.
污水厂运行过程中为了使出水总磷达到一级A排放标准需辅以化学除磷，采用的除磷剂主要是铁盐，产生的磷酸亚铁以剩余污泥的形式排出，因此市政污泥中含有大量的铁源，如北京地区市政污泥中铁含量可达22.4-27.7g/kg。污泥中的铁源以磷酸亚铁的形式存在，无法对砷形成吸附作用。嗜酸性氧化亚铁硫杆菌可以将污泥中的磷酸亚铁转化为羟基硫酸铁，进行施氏矿物的合成，反应式如下：During the operation of the sewage plant, in order to make the total phosphorus in the effluent meet the first-class A discharge standard, it is necessary to supplement chemical phosphorus removal. The phosphorus removal agent used is mainly iron salt, and the ferrous phosphate produced is discharged in the form of excess sludge. Therefore, municipal sludge Contains a large amount of iron sources, such as the iron content in municipal sludge in Beijing area can reach 22.4-27.7g/kg. The iron source in the sludge exists in the form of ferrous phosphate, which cannot adsorb arsenic. Acidophilic Thiobacillus ferrooxidans can convert ferrous phosphate in sludge into ferric hydroxysulfate for the synthesis of Schwartz minerals. The reaction formula is as follows:
形成的施氏矿物对砷有高效的专性吸附功能，吸附机理为As(Ⅲ)与矿物表面金属羟基的表面络合、与矿物表面及隧道结构内SO4 2-的配位体交换作用。The formed Shi's mineral has efficient and specific adsorption function for arsenic. The adsorption mechanism is surface complexation between As(Ⅲ) and metal hydroxyl on the mineral surface, and ligand exchange with SO 4 2- on the mineral surface and in the tunnel structure.
嗜酸性氧化亚铁硫杆菌利用污泥中的內源铁形成羟基硫酸铁污泥。羟基硫酸铁污泥含有大量的施氏矿物，可作为除砷吸附剂，实现了污泥的资源化。污泥高温炭化处理过程可消除污泥中有害病原菌和寄生虫卵，实现了污泥的减量化和无害化。同时，污泥热解过程随着挥发分的析出，污泥热解焦炭的孔隙结构逐渐发达。污泥基生物炭的丰富孔隙、较大比表面积及存在有机基团使其吸附能力远超于污泥。本发明制备的羟基硫酸铁污泥基生物炭不但对砷有高效的专性吸附作用，而且实现了污泥的资源化利用。Acidophilus ferrooxidans utilizes endogenous iron in sludge to form ferric hydroxysulfate sludge. Ferric hydroxysulfate sludge contains a large amount of Shi's minerals, which can be used as an adsorbent for arsenic removal and realize the resource utilization of sludge. The sludge high-temperature carbonization treatment process can eliminate harmful pathogenic bacteria and parasite eggs in the sludge, and realize the reduction and harmlessness of the sludge. At the same time, with the precipitation of volatile matter during the sludge pyrolysis process, the pore structure of the sludge pyrolysis coke gradually developed. The abundant pores, large specific surface area and presence of organic groups of sludge-based biochar make its adsorption capacity far exceed that of sludge. The ferric hydroxysulfate sludge-based biochar prepared by the invention not only has high-efficiency specific adsorption on arsenic, but also realizes resource utilization of sludge.
发明内容Contents of the invention
本发明的目的是针对上述存在问题和技术分析，提供一种羟基硫酸铁污泥基生物炭的制备方法及应用，该方法利用污泥內源铁生成羟基硫酸铁，无需外加铁源，节约了成本；制备的羟基硫酸铁污泥基生物炭对砷有高效的专性吸附作用，不但实现了污泥的资源化利用，而且提供了一种新的砷吸附剂。The purpose of the present invention is to provide a preparation method and application of ferric hydroxysulfate sludge-based biochar for the above-mentioned existing problems and technical analysis. Cost; The prepared ferric hydroxysulfate sludge-based biochar has efficient and specific adsorption on arsenic, which not only realizes the resource utilization of sludge, but also provides a new arsenic adsorbent.
本发明的技术方案：Technical scheme of the present invention:
一种羟基硫酸铁污泥基生物炭的制备方法，包括以下步骤:A preparation method for ferric hydroxysulfate sludge-based biochar, comprising the following steps:
1.向独立格空气提升推流式反应器中曝气运行的含水率为2-3wt％的市政污泥中投加浓度为9.2mol/L的硫酸以调节pH为4，反应24-48h，使污泥中內源铁析出并析出率为50-80％；1. Add sulfuric acid with a concentration of 9.2mol/L to adjust the pH to 4 in the municipal sludge with a moisture content of 2-3wt% in the aerated air-lifting plug-flow reactor, and react for 24-48h. Make the endogenous iron in the sludge precipitate and the precipitation rate is 50-80%;
2.向上述污泥中接入嗜酸性氧化亚铁硫杆菌，接种量为10wt％，接种后污泥进行连续曝气，在反应器中停留48-60h，反应至污泥溶液中Fe2+的氧化率大于等于95％，得到羟基硫酸铁污泥；2. Insert acidophilic Thiobacillus ferrooxidans into the above sludge, the inoculum amount is 10wt%, the sludge is continuously aerated after inoculation, stays in the reactor for 48-60h, and reacts to the Fe 2+ in the sludge solution The oxidation rate is greater than or equal to 95%, and iron hydroxysulfate sludge is obtained;
3.将上述羟基硫酸铁污泥进行压滤脱水，脱水后污泥含水率为55-65％，脱水后的污泥在105℃干燥8h；3. Dewater the above iron hydroxysulfate sludge by pressure filtration, the moisture content of the dehydrated sludge is 55-65%, and the dehydrated sludge is dried at 105°C for 8 hours;
4.将上述干燥后的污泥研磨过2mm筛，将过筛的污泥在N2保护下热解1h，N2速率为50mL/min,热解温度为600-700℃,热解完成后，降至室温，制得羟基硫酸铁污泥基生物炭。4. Grind the above-mentioned dried sludge through a 2mm sieve, and pyrolyze the sieved sludge for 1 hour under the protection of N 2 , the rate of N 2 is 50mL/min, and the pyrolysis temperature is 600-700°C. , down to room temperature, and ferric hydroxysulfate sludge-based biochar was prepared.
一种所制备的羟基硫酸铁污泥基生物炭的应用，作为砷吸附剂用于高效吸附砷。An application of the prepared ferric hydroxysulfate sludge-based biochar as an arsenic adsorbent for efficient arsenic adsorption.
本发明的优点是：The advantages of the present invention are:
该方法利用污泥內源铁生成羟基硫酸铁，无需外加铁源，节约了成本；制备的羟基硫酸铁污泥基生物炭可高效的专性吸附砷，不但实现了污泥的资源化利用，而且提供了一种新的砷吸附剂；污泥炭化处理过程可消除污泥中有害病原菌和寄生虫卵，实现了污泥的减量化和无害化。This method utilizes the endogenous iron in the sludge to generate ferric hydroxysulfate without adding an external iron source, which saves costs; the prepared ferric hydroxysulfate sludge-based biochar can efficiently and specifically adsorb arsenic, which not only realizes the resource utilization of sludge, Moreover, a new arsenic adsorbent is provided; the sludge carbonization treatment process can eliminate harmful pathogenic bacteria and parasite eggs in the sludge, and realize the reduction and harmlessness of the sludge.
附图说明Description of drawings
图1为本发明羟基硫酸铁污泥基生物炭的实物图。Fig. 1 is the actual picture of iron hydroxysulfate sludge-based biochar of the present invention.
图2为本发明羟基硫酸铁污泥基生物炭对1mg/L砷溶液的吸附效果图。Fig. 2 is a graph showing the adsorption effect of ferric hydroxysulfate sludge-based biochar of the present invention on 1 mg/L arsenic solution.
图3为本发明羟基硫酸铁污泥基生物炭对4.5mg/L砷溶液的吸附效果图。Fig. 3 is a graph showing the adsorption effect of ferric hydroxysulfate sludge-based biochar of the present invention on 4.5 mg/L arsenic solution.
具体实施方式Detailed ways
以下通过实施案例对本发明作进一步说明，而非限制本发明。The present invention will be further described through examples of implementation below, rather than limiting the present invention.
实施例1：Example 1:
一种羟基硫酸铁污泥基生物炭的制备方法，包括以下步骤:A preparation method for ferric hydroxysulfate sludge-based biochar, comprising the following steps:
1.向独立格空气提升推流式反应器中曝气运行的含水率为2wt％的市政污泥中投加浓度为9.2mol/L的硫酸以调节pH为4，反应24h，使污泥中內源铁析出并析出率为50％；1. Add sulfuric acid with a concentration of 9.2mol/L to adjust the pH to 4 in the municipal sludge with a moisture content of 2wt% in the aerated air-lifting plug-flow reactor, and react for 24 hours to make the sludge The endogenous iron is precipitated and the precipitation rate is 50%;
2.向上述污泥中接入嗜酸性氧化亚铁硫杆菌，接种量为10wt％，接种后污泥进行连续曝气，在反应器中停留48h，反应至污泥溶液中Fe2+的氧化率大于95％，得到羟基硫酸铁污泥；2. Insert acidophilic Thiobacillus ferrooxidans into the above sludge, the inoculum size is 10wt%, the sludge after inoculation is continuously aerated, stays in the reactor for 48h, and reacts to the oxidation of Fe in the sludge solution The rate is greater than 95%, and hydroxyferric sulfate sludge is obtained;
3.将上述羟基硫酸铁污泥进行压滤脱水，脱水后污泥含水率为55-65％，脱水后的污泥在105℃干燥8h；3. Dewater the above iron hydroxysulfate sludge by pressure filtration, the moisture content of the dehydrated sludge is 55-65%, and the dehydrated sludge is dried at 105°C for 8 hours;
4.将上述干燥后的污泥研磨过2mm筛，将过筛的污泥在N2保护下热解1h，N2速率为50mL/min,热解温度为600-700℃,热解完成后，降至室温，制得羟基硫酸铁污泥基生物炭。4. Grind the above-mentioned dried sludge through a 2mm sieve, and pyrolyze the sieved sludge for 1 hour under the protection of N 2 , the rate of N 2 is 50mL/min, and the pyrolysis temperature is 600-700°C. , down to room temperature, and ferric hydroxysulfate sludge-based biochar was prepared.
图1为本发明羟基硫酸铁污泥基生物炭的实物图。Fig. 1 is the actual picture of iron hydroxysulfate sludge-based biochar of the present invention.
将所制备的羟基硫酸铁污泥基生物炭作为砷吸附剂用于高效吸附砷，检测方法如下：The prepared ferric hydroxysulfate sludge-based biochar was used as an arsenic adsorbent to efficiently adsorb arsenic, and the detection method was as follows:
量取As(Ⅲ)含量为1mg/L的砷溶液100mL置于250mL锥形瓶中，加入0.3g基硫酸铁污泥基生物炭使吸附剂的投加量为3g/L。将锥形瓶放置在摇床中25℃、180rpm震荡24小时，之后静置并检测溶液中砷的浓度。Measure 100 mL of arsenic solution with an As(Ⅲ) content of 1 mg/L in a 250 mL Erlenmeyer flask, and add 0.3 g of ferric sulfate sludge-based biochar to make the dosage of the adsorbent 3 g/L. The Erlenmeyer flask was placed in a shaker at 25° C. and 180 rpm for 24 hours, then stood still and the concentration of arsenic in the solution was detected.
图2为本发明羟基硫酸铁污泥基生物炭对1mg/L砷溶液的吸附效果图。检测结果表明：溶液中的砷在第10天左右已基本降为0，继续监测至第70天被吸附的砷并无解析现象。Fig. 2 is a graph showing the adsorption effect of ferric hydroxysulfate sludge-based biochar of the present invention on 1 mg/L arsenic solution. The test results showed that the arsenic in the solution was basically reduced to zero on the 10th day, and there was no analysis of the adsorbed arsenic until the 70th day.
实施例2：Example 2:
一种羟基硫酸铁污泥基生物炭的制备方法，包括以下步骤:A preparation method for ferric hydroxysulfate sludge-based biochar, comprising the following steps:
1.向独立格空气提升推流式反应器中曝气运行的含水率为3wt％的市政污泥中投加浓度为9.2mol/L的硫酸以调节pH为4，反应48h，使污泥中內源铁析出并析出率为80％；1. Add sulfuric acid with a concentration of 9.2mol/L to adjust the pH to 4 in the municipal sludge with a moisture content of 3wt% in the aerated air-lifting plug-flow reactor in an independent grid, and react for 48 hours to make the sludge in the sludge The endogenous iron is precipitated and the precipitation rate is 80%;
2.向上述污泥中接入嗜酸性氧化亚铁硫杆菌，接种量为10wt％，接种后污泥进行连续曝气，在反应器中停留48h，反应至污泥溶液中Fe2+的氧化率大于95％，得到羟基硫酸铁污泥；2. Insert acidophilic Thiobacillus ferrooxidans into the above sludge, the inoculum size is 10wt%, the sludge after inoculation is continuously aerated, stays in the reactor for 48h, and reacts to the oxidation of Fe in the sludge solution The rate is greater than 95%, and hydroxyferric sulfate sludge is obtained;
3.将上述羟基硫酸铁污泥进行压滤脱水，脱水后污泥含水率为65％，脱水后的污泥在105℃干燥8h；3. Dewater the above iron hydroxysulfate sludge by pressure filtration, the moisture content of the dehydrated sludge is 65%, and the dehydrated sludge is dried at 105°C for 8 hours;
4.将上述干燥后的污泥研磨过2mm筛，将过筛的污泥在N2保护下热解1h，N2速率为50mL/min,热解温度为700℃,热解完成后，降至室温，制得羟基硫酸铁污泥基生物炭。4. Grind the above-mentioned dried sludge through a 2mm sieve, and pyrolyze the sieved sludge for 1 hour under the protection of N 2 , the rate of N 2 is 50mL/min, and the pyrolysis temperature is 700°C. to room temperature to prepare ferric hydroxysulfate sludge-based biochar.
将所制备的羟基硫酸铁污泥基生物炭作为砷吸附剂用于高效吸附砷，检测方法如下：The prepared ferric hydroxysulfate sludge-based biochar was used as an arsenic adsorbent to efficiently adsorb arsenic, and the detection method was as follows:
量取As(Ⅲ)含量为4.5mg/L的砷溶液100ml置于250ml锥形瓶中，加入0.5g基硫酸铁污泥基生物炭使吸附剂的投加量为5g/L。将锥形瓶放置在摇床中25℃、180rpm震荡24小时，之后静置并监测溶液中砷的浓度。Measure 100ml of arsenic solution with an As(Ⅲ) content of 4.5mg/L and place it in a 250ml Erlenmeyer flask, add 0.5g ferric sulfate sludge-based biochar to make the dosage of the adsorbent 5g/L. The Erlenmeyer flask was placed in a shaker at 25° C. and 180 rpm for 24 hours, then stood still and the concentration of arsenic in the solution was monitored.
图3为本发明羟基硫酸铁污泥基生物炭对4.5mg/L砷溶液的吸附效果图。检测结果表明：溶液中的砷在第10天左右仍保持在2.3mg/L的水平，但第35天降至0.19mg/L，继续监测至第60天溶液中的只有0.004mg/L，被吸附的砷并无解析现象。Fig. 3 is a graph showing the adsorption effect of ferric hydroxysulfate sludge-based biochar of the present invention on 4.5 mg/L arsenic solution. The test results showed that the arsenic in the solution remained at a level of 2.3 mg/L on the 10th day, but dropped to 0.19 mg/L on the 35th day, and continued to monitor until the 60th day in the solution to only 0.004 mg/L, which was Adsorbed arsenic has no desorption phenomenon.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524096.0A CN106179201B (en) | 2016-07-05 | 2016-07-05 | A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524096.0A CN106179201B (en) | 2016-07-05 | 2016-07-05 | A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106179201A CN106179201A (en) | 2016-12-07 |
| CN106179201B true CN106179201B (en) | 2018-12-14 |
Family
ID=57466194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524096.0A Active CN106179201B (en) | 2016-07-05 | 2016-07-05 | A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106179201B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3084790A1 (en) * | 2017-12-07 | 2019-06-13 | University Of Copenhagen | Composite comprising green rust and carbon for environmental remediation |
| CN111389359B (en) * | 2020-03-26 | 2022-02-01 | 西北工业大学深圳研究院 | Biochar adsorbing material based on sulfate-reduced sludge and preparation method and application thereof |
| CN114308037B (en) * | 2021-12-14 | 2023-07-04 | 南京农业大学 | Adsorption catalysis double-effect material, and preparation method and application thereof |
| CN116966873B (en) * | 2023-07-03 | 2025-01-28 | 武汉纺织大学 | Iron-based modified biochar and its preparation method and application |
| CN117105432A (en) * | 2023-08-30 | 2023-11-24 | 中南大学 | A kind of Shiite mineral iron-based-biochar composite material and its preparation and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559354A (en) * | 2009-04-29 | 2009-10-21 | 同济大学 | Preparation method of sludge absorber and applications thereof |
| CN102976437A (en) * | 2012-12-17 | 2013-03-20 | 天津工业大学 | Method for treating arsenic in water with high-specific-surface-area Schwertmannite adsorbent |
| CN103910402A (en) * | 2014-01-10 | 2014-07-09 | 周立祥 | Granular Schwertmannite and its preparation method and use |
| CN104163462A (en) * | 2014-06-26 | 2014-11-26 | 中山大学 | Application of municipal sludge for removal of arsenic |
| CN104496140A (en) * | 2014-11-11 | 2015-04-08 | 北京中科国通环保工程技术有限公司 | Municipal sludge bioleaching method |
-
2016
- 2016-07-05 CN CN201610524096.0A patent/CN106179201B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559354A (en) * | 2009-04-29 | 2009-10-21 | 同济大学 | Preparation method of sludge absorber and applications thereof |
| CN102976437A (en) * | 2012-12-17 | 2013-03-20 | 天津工业大学 | Method for treating arsenic in water with high-specific-surface-area Schwertmannite adsorbent |
| CN103910402A (en) * | 2014-01-10 | 2014-07-09 | 周立祥 | Granular Schwertmannite and its preparation method and use |
| CN104163462A (en) * | 2014-06-26 | 2014-11-26 | 中山大学 | Application of municipal sludge for removal of arsenic |
| CN104496140A (en) * | 2014-11-11 | 2015-04-08 | 北京中科国通环保工程技术有限公司 | Municipal sludge bioleaching method |
Non-Patent Citations (1)
| Title |
|---|
| "施氏矿物的生物合成及去除水中砷的效果与机理研究";廖岳华;《中国博士学位论文全文数据库工程科技I辑》;20090815(第8期);B027-48，正文第16-29,69页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106179201A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Velusamy et al. | Advanced techniques to remove phosphates and nitrates from waters: a review | |
| CN106179201B (en) | A kind of preparation method and application of hydroxide iron sulfate sludge base charcoal | |
| Xu et al. | Efficient adsorption of heavy metals from wastewater on nanocomposite beads prepared by chitosan and paper sludge | |
| KR101681381B1 (en) | Chicken manure biochar activated by phosphoric acid and method for removing lead using the same | |
| CN104289185B (en) | A granular filter material for adsorbing and removing heavy metals in water and its preparation method | |
| CN109809519B (en) | Organic-inorganic composite sewage treatment agent and preparation method thereof | |
| CN101973619B (en) | A method for treating copper smelting wastewater with modified phosphogypsum | |
| CN104193002A (en) | Method for efficiently treating nitrogen-containing wastewater based on zero-valent iron coupled anaerobic ammonia oxidation | |
| CN109876770A (en) | Preparation method and application of magnetic hydrothermal carbon adsorbent | |
| CN113321345A (en) | Method for simultaneously recovering phosphorus in water body and removing antibiotics based on sludge-based biochar | |
| CN110523379A (en) | A low-cost preparation method of porous carbon | |
| CN106186161A (en) | A kind of pig manure charcoal is utilized to remove the method for lead in polluted-water | |
| CN112569900B (en) | Preparation method and application of municipal sludge biochar | |
| CN103708704B (en) | Pre-treatment method for deep sludge dewatering | |
| CN106007001A (en) | Method for removing sulfate and Zn(II) wastewater by virtue of synergism of spongy iron and microorganisms | |
| CN106964320A (en) | A kind of high-efficient treatment method of mercury-containing waste water | |
| CN104163462B (en) | The application in going arsenic removal of a kind of municipal sludge | |
| CN109368985B (en) | A kind of sludge dewatering method | |
| CN115340194A (en) | Method for removing hexavalent chromium by sludge iron-rich biochar and pseudomonas aeruginosa in synergistic manner | |
| CN107670651A (en) | The method that sludge based biomass hydro-thermal carbon adsorbent removes cefotaxime antibiotic in water removal | |
| CN114230134A (en) | Inorganic conditioner for municipal sludge drying treatment and preparation method thereof | |
| CN112108118B (en) | Fenton sludge and cellulose-based magnetic biomass charcoal and preparation method and application thereof | |
| CN104649403B (en) | Sewage disposal magnetic fillers and preparation method thereof | |
| CN109012585A (en) | The preparation method of the modified cow dung base charcoal of the iron of perchlorate in Adsorption water | |
| CN106396124A (en) | A method of removing sulfates and Cu (II) in waste water through combining sponge iron and microbes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |