共查询到19条相似文献,搜索用时 546 毫秒
1.
目前污泥的处置是一个昂贵且环境敏感的问题。污泥制各活性炭为污泥的资源化利用提供了有效的途径。综述了在污泥制备活性炭过程中,对污泥衍生活性炭的性能具有重要影响的各种因素的研究现状,提出了今后主要的研究方向。 相似文献
2.
城市污泥的处理及污泥制活性炭的研究现状 总被引:1,自引:0,他引:1
介绍了国内外一些污泥处理减量化技术及研究进展,分析了几种常用的污泥处置方法及存在的问题.用城市污水厂污泥制备活性炭,可以用于污水处理,去除有毒有害物质,具有良好的环境效益和社会效益. 相似文献
3.
城市剩余污泥制备活性炭吸附剂对Ni2+的吸附研究 总被引:1,自引:0,他引:1
以城市污水处理厂剩余脱水污泥为原料,采用化学活化热解法制备了污泥活性炭吸附剂,对水溶液中的Ni2+进行去除,确定了最佳实验参数。实验结果表明,吸附时间为1 h、p H为7、吸附剂用量为6 g/L时,对含Ni2+废水(Ni2+质量浓度为50 mg/L)的平均去除率为29.132%,污泥活性炭吸附剂的平均吸附容量为2.428 mg/g。通过单因素实验得出吸附时间为80 min、溶液p H为7时,对溶液中的Ni2+有较好的去除效果。Ni2+在污泥活性炭吸附剂上的吸附比较符合伪二级吸附动力学方程,Langmuir等温方程更适合描述Ni2+在污泥活性炭吸附剂上的吸附行为。 相似文献
4.
以城市污水厂二沉池污泥为主要原料、固体ZnCl2为活化剂,添加一定量锯末,在高温管式炉中采用化学活化法制备污泥活性炭,通过单因素实验考察了锯末添加率、盐料比、活化温度、活化时间对污泥活性炭吸附性能的影响. 结果表明,锯末添加量为20%、盐料质量比为2.0、活化温度为550℃、活化时间为15 min时,所得活性炭碘吸附性能最优,达679.25 mg/g;污泥活性炭具有发达的孔结构,其比表面积达609.68 m2/g,总孔容为0.51 cm3/g,平均孔径为3.51 nm. 相似文献
5.
污泥衍生活性炭制备与性能表征 总被引:3,自引:1,他引:2
通过对青岛海泊河污水处理厂的污泥性质和组成分析,研究了以城市污水厂污泥为基本原料,采用CO2活化法制备活性炭吸附剂.选取炭化温度、炭化时间、CO2流量、活化温度和活化时间等因素,通过正交实验确定最佳工艺条件.通过亚甲基蓝吸附值、电镜照片对制备的污泥活性炭进行性能评价,结果表明:最佳工艺条件炭化温度为550 ℃、炭化时间90min、二氧化碳流量250 mL/min、活化温度950 ℃、活化时间120 min,污泥衍生活性炭亚甲基蓝吸附值245 mg/g. 相似文献
6.
微波法制备软锰矿-污泥基活性炭的工艺条件及吸附性能研究 总被引:1,自引:0,他引:1
以城市污水厂污泥为原料,软锰矿为催化剂,氯化锌为活化剂,通过微波活化工艺制备污泥活性炭。研究了软锰矿添加量、微波功率、微波辐照时间和氯化锌浓度等对活性炭亚甲基蓝吸附值的影响,确定了适宜的制备污泥活性炭的工艺条件:软锰矿添加量为0.4%、微波活化处理功率500W、活化时间5min、氯化锌浓度40%,在此条件下所得污泥活性炭MSAC-1的亚甲基蓝吸附值最高可以达到92.2mg/g,利用该活性炭处理活性艳红X-3B染料废水,脱色率最高可达95%。 相似文献
7.
污泥活性炭的制备及对亚甲基蓝吸附性能研究 总被引:1,自引:0,他引:1
以城市污水处理厂的剩余污泥为原料,磷酸为污泥活化剂,采用微波加热法制备了污泥活性炭,考察了吸附剂投加量、吸附时间和p H对吸附效果的影响,并对其吸附动力学特性进行了探讨。结果表明:p H为8,投药量m为0.26 g,吸附时间为59 min,吸附温度为35℃,吸附浓度为58 mg/L时,污泥活性炭对亚甲基蓝的吸附效果最佳。污泥活性炭对亚甲基蓝的吸附满足Langmuir等温吸附方程。 相似文献
8.
9.
10.
在从污泥基活性炭的组成、污泥基活性炭独特的结构与特性及影响污泥基活性炭独特的结构性质因素等三个维度概述污泥基活性炭基础上,从污泥基活性炭催化剂的制备、污泥基活性炭催化剂的设计与改性及污泥基活性炭催化剂在环境保护中的应用等三方面进行了综述。总结了污泥基活性炭作为催化剂和催化剂载体的特性,2种污泥基活性炭催化剂的制备方法的原理,污泥基活性炭催化剂的3类改性方法,综述了污泥基活性炭催化剂在高级氧化技术降解废水中的污染物和在光催化降解废水中污染物的应用研究进展。对污泥基活性炭在提高其催化性能、拓展其应用领域等方面进行了展望。 相似文献
11.
城市污水处理厂污泥处理处置的技术分析 总被引:1,自引:0,他引:1
简要介绍了城市污水处理厂污泥处理处置技术,提出污泥产业发展的建议,指出土地利用是符合我国国情的污泥处置的方向之一。合理确定污水处理厂污泥处理处置,政府在污泥产业发展中发挥着较为重要的作用。 相似文献
12.
13.
14.
负载TiO2城市污泥改性物光催化剂的制备 总被引:1,自引:0,他引:1
用城市污水处理厂的剩余污泥作原料,炭化制备活性炭吸附剂。以钛酸丁酯和无水乙醇为原料,乙酸为水解抑制剂,采用溶胶-凝胶法制备纳米TiO2粉体,利用浸渍-烧结法将其负载于制备的污泥活性炭上,获得TiO2/AC光催化剂。以重金属离子Hg2+为目标污染物进行光催化去除实验,考察了抑制剂用量、TiO2的负载量、煅烧温度等对TiO2/AC催化性能的影响。结果表明,当CH3COOH∶Ti(OBu)4=0.8~1.0时,对Hg2+的催化去除效果较好;TiO2负载量为33.3%时,TiO2/AC光催化剂具有良好的吸附性能和更高的催化活性;煅烧温度直接影响晶体的结构,550℃煅烧时生成的混合晶体具有较高的催化性能。在最佳条件下制备的TiO2/AC光催化剂对水溶液中20 mg/L的Hg2+的光催化去除率可达到88.5%。 相似文献
15.
Maria J Martin Adriana Artola Ma Dolors Balaguer Miquel Rigola 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2002,77(7):825-833
Surplus sludge produced during the biological treatment of wastewater requires costly disposal procedures. With increasing environmental and legislative constraints, increasing sludge production and more limited disposal options, new recycling alternatives have to be found. The possibility of obtaining activated carbons from surplus biological sludge by chemical activation with H2SO4 has been investigated. Operational parameters such as the amount of H2SO4 added, the temperature, and activation time were modified to ascertain their influence on the quality of the activated carbon obtained. The quality of the sludge‐based activated carbons was evaluated by established characterisation parameters for adsorption from solution such as phenol value, iodine number, methylene blue number and tannin value and compared with commercial activated carbons. Activation at 700 °C for 30 min in the presence of 0.5 cm3 H2SO4 g?1 dry solids in the sludge led to an activated carbon with a good capacity for iodine and tannic acid. The sludge‐derived activated carbon obtained is mesoporous in nature with a high presence of large macropores. Weak and moderate acidic surface functional groups were detected on the surface, which impart a hydrophilic nature to the solid. When compared with a commercial activated carbon, the sludge‐derived activated carbon performed better when removing dyes with a high presence of anionic solubilising groups and heavy metals. The results indicate that COD adsorption from a biologically‐treated effluent may also be an area for application. © 2002 Society of Chemical Industry 相似文献
16.
通过对猎德污水处理厂污泥成分的研究表明猎德污水处理厂污泥性质稳定,其有机质及总养分含量属于中等,并且pH指标与卫生学指标良好,重金属含量相对较低,符合《城镇污水处理厂污泥处置农用泥质》标准,是良好的农用泥质。 相似文献
17.
《Separation and Purification Technology》2002,26(2-3):295-304
Adsorption capacity and bioactivity of a novel mesoporous activated carbon (IIT Carbon) and bioactive (BACIIT) catalyst produced from papermill sludge were evaluated. Conversion of paper mill sludge to useful activated carbons and biocatalysts is a significant process since it reduces environmental problems associated with disposal of waste sludge, enhances wastewater treatment using carbons produced from industrial waste itself, and promotes conservation of the naturally available primary resources currently used to make activated carbons. Analysis was conducted using synthetic wastewater containing phenol and a commercially available activated carbon, sorbonorite 4 (used as reference carbon). Phenol removal was accomplished in batch and fluidized bed reactors containing mesoporous activated carbon, sorbonorite 4, and the produced bioactive catalysts. Isotherm adsorption data indicated that mesoporous activated carbon has a higher adsorption capacity and molecular surface coverage than sorbonorite 4 for phenol concentrations less than 10 mg/l. The mass transfer limitation was accounted for the lower adsorption capacity of the microporous carbon (sorbonorite 4) in dilute solutions. The fluidized bed reactor study, however, indicated similar but slightly lower phenol removal capability for the produced mesoporous carbon. While phenol removal efficiency of the carbons studied was in the range 65–70%, the produced bioactive catalysts were able to remove up to 97% of phenol during first few hours of operation. These results suggest that mesoporous carbon will feasibly be a good substitute for other commercially available activated carbons produced from natural resources, not only in physical adsorption processes, but also in fluidized bed bioreactors (FBB), used in biodegradation processes. 相似文献
18.