活性焦吸附处理五氯酚钠废水  

Adsorption of sodium pentachlorophenate wastewater on activated coke

作　　者：王亮[1] 姜振明 赵泉林[1] 薛江鹏 徐文杰[1] 苏宏平 高学文 叶正芳[1] 

机构地区：[1]北京大学环境工程系水沙科学教育部重点实验室,北京100871 [2]甘肃银光化学工业集团有限公司,白银730900 [3]西北师范大学地理与环境科学学院,兰州730070

出　　处：《环境化学》2015年第8期1545-1552,共8页Environmental Chemistry

摘　　要：以活性焦为吸附剂,采用静态吸附实验考察活性焦对PCP-Na模拟废水的吸附性能,研究了反应时间、温度、p H值、活性焦用量对吸附效果的影响,采用急性毒性法评价吸附前后废水急性毒性的变化.结果表明,在原始p H下,温度40℃,活性焦用量4 g·L-1,反应时间180 min时,废水中PCP-Na的浓度由100 mg·L-1降为2.92 mg·L-1,去除率97.07%.吸附后废水的急性毒性下降99.09%.PCP-Na在活性焦表面的吸附是拟二级反应,吸附速率常数为2.52×10-2g·mg-1·min-1,其吸附行为可用Langmuir等温线模型进行描述;热力学计算结果表明吸附反应是自发和吸热过程.Sodium pentachlorophenate（ PCP-Na） wastewater is highly toxic and poorly degradable.Static adsorption test was conducted to investigate the adsorption properties of activated coke（ AC）for treatment of PCP-Na simulated wastewater. The effect of contact time,temperature,p H and activated coke dosage on PCP-Na removal was studied. Under the conditions of initial p H and 40 ℃,the concentration of PCP-Na decreased from 100 to 2. 92 mg·L- 1after 180 min of contact with the AC dosage of 4g·L- 1,The acute toxicity was reduced by 99. 09% after adsorption. The adsorption kinetics of PCP-Na on AC was coincident with pseudo second- order and the rate constant was 2. 52 ×10- 2g·mg- 1·min- 1. The Langmuir isotherm can be used to describe the adsorption process. The thermodynamic analytical results indicated that the adsorption was spontaneous and endothermic.

关 键 词：活性焦 五氯酚钠 吸附动力学 吸附热力学 急性毒性 

分 类 号：X703[环境科学与工程—环境工程]