HA的存在对活性污泥吸附Cu^(2+)的影响  

Study on the influence of Cu^(2+) adsorption onto activated sludge in the presence of HA

作　　者：刘智萍[1,2,3] 施萍[1] 方芳[1,2,3] 武文会 苟凯 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆40045 [2]重庆大学三峡库区生态环境教育部重点实验室,重庆40045 [3]重庆大学低碳绿色建筑国际联合研究中心,重庆40045

出　　处：《重庆大学学报（自然科学版）》2016年第4期118-126,共9页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(51278509)~~

摘　　要：为探讨HA、金属Cu2+以及活性污泥三者间的相互作用关系,研究了在HA存在下,不同吸附时间、pH值、Cu2+质量浓度以及温度对活性污泥吸附Cu2+的影响,并从热力学、吸附前后活性污泥性状以及红外光谱等角度分析了活性污泥吸附Cu2+机理。结果表明,当活性污泥为2g/L、HA质量浓度为50mg/L、pH=6,Cu2+质量浓度为50mg/L时,经过90min达到吸附平衡,Cu2+吸附量为45.98mg/L,吸附率达到91.96%。研究发现,HA可以削弱Cu2+对活性污泥的毒性,活性污泥吸附Cu2+主要依靠氢键力和偶极间力,而多糖类、脂类C—O及苯环C—H等官能团在吸附过程中发挥着主要作用。To investigate the interaction among HA, Cu2＋ and activated sludge, we researched the influence of adsorption time, pH, Cu2＋ concentration and temperature on the adsorption of Cu2＋ onto activated sludge in the presence of HA, respectively, and analyzed the adsorption mechanism from the aspects of thermodynamics, sludge characteristics and Fourier transform infrared spectroscopy （FTIR） before and after adsorption. The results show that the equilibrium time of the adsorption of Cu2＋ onto activated sludge in the presence of HA is 90 min under the conditions of pH, the concentrations of activated sludge, Cu2＋ and HA are 6, 2 g/L, 50 mg/L and 50 mg/L, respectively. When the adsorption equilibrium is reached, the adsorption capacity of Cu2＋ is 45.98 mg/L and the adsorption rate is 91.96%. It＇s also found that HA can weaken the toxicity of Cu2＋ to activated sludge. The performance of activated sludge absorbing Cu2＋ mainly depends on the hydrogen bond force and the dipole force, and the functional groups of polysaccharide lipid C-O and benzene ring C-H also play a major role in the process of adsorption.

关 键 词：活性污泥 吸附 CU2+ HA 

分 类 号：X703[环境科学与工程—环境工程]