净水厂干化铝污泥对苯酚的吸附研究  

Adsorption Study of Dried Alum-sludge from a Water Treatment Plant towards Phenol Water

作　　者：焦晓飞 段润斌 杜震宇[1] JIAO Xiaofei;DUAN Runbin;DU Zhenyu(College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学环境科学与工程学院,太原030024

出　　处：《太原理工大学学报》2020年第5期717-723,共7页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目(201901D111068)。

摘　　要：以净水厂干化铝污泥废弃物资源化应用和对含酚工业废水处理为目标,对净水厂污泥进行了苯酚的吸附研究。在对干化铝污泥微观形态表征的基础上,研究了污泥投加量、pH、吸附时间、温度和苯酚溶液初始质量浓度对吸附效果的影响。试验结果表明,去除效果与污泥投加量、溶液pH、时间以及温度成正相关,与苯酚初始质量浓度成负相关。Langmuir模型能够准确地描述净水厂污泥对苯酚的吸附特性,25℃时苯酚的饱和吸附量为10.509 mg/g,吸附过程更符合准一级动力学方程,吸附过程为自发的、吸热的、熵增的反应。The objective of the research was to reuse the dried alum sludge(DAS)from a water treatment plant to remove phenol from industrial wastewater.The impact factors including sludge dosage,initial pH,adsorption time,temperature,and initial phenol concentration were explored for the effects on phenol adsorption on the basis of the characterization of the micro-structure of DAS.The results show that the adsorption removal of phenol increased with increasing dose,pH,and adsorption time and temperature and decreased with increasing initial phenol concentration.Langmuir isothermal model could more accurately describe the isothermal curve of DAS adsorption towards phenol.The maximum adsorption capacity towards phenol was 10.509 mg/g at 25℃.The adsorption kinetics of DAS towards phenol fit well with pseudo-second-order kinetic model.The adsorption is a spontaneous and endothermic progress along with entropy production.

关 键 词：净水厂污泥 吸附 苯酚 工业废水 

分 类 号：X703[环境科学与工程—环境工程]