海藻酸钠固定化污泥基生物质炭对铜的吸附性能研究  

ADSORPTION PROPERTY OF SODIUM ALIGINATE IMMOBILIZED SLUDGE CARBON WITH COPPER

作　　者：杜淑雯 周浩[1] 彭玉倩[1] 熊长齐 魏东宁[1] 黄红丽[1] 

机构地区：[1]湖南农业大学资源环境学院环境科学系,长沙410128

出　　处：《环境工程》2017年第2期37-42,共6页Environmental Engineering

基　　金：国家自然科学基金青年科学基金项目(51108178);湖南农业大学青年科学基金项目(14QN24);湖南农业大学大学生创新性实验计划项目(XCX15114);省级大学生研究性学习和创新性实验计划项目(SCX1515);国家级大学生创新创业训练计划项目(201510537011)

摘　　要：以城市污水厂的剩余污泥为原料制备生物质炭(SC),采用海藻酸钠加以固定使其成为污泥基生物质炭(SASC),通过正交试验确定SASC最佳制备工艺,考察吸附时间、铜离子的浓度、pH值、温度、转速、投加量对SASC吸附Cu^(2+)效果的影响。结果表明制备SASC的最佳条件是:海藻酸钠浓度为1.5%、包炭量为2%、CaCl_2浓度为1%、交联时间为0.5 h。在pH为5.0、温度为30℃、转速为150 r/min、投加量为0.24 g/mg、吸附时间为4 h的条件下Cu^(2+)去除率高达98.73%。SASC对Cu^(2+)的吸附机理服从准二级动力学方程,吸附等温线服从Freundlich方程,Cu^(2+)在SASC上的吸附为多层吸附。The sludge carbon （SC） was prepared on the basis of sludge from wastewater treatment and then it was immobilized by sodium alginate. The orthogonal test was used to determine the best preparation process of sodium alginate immobilized sludge carbon （ SASC）. The influence of single factor for SASC to copper adsorption, including time, initial wastewater copper concentration, pH value, temperature, speed of the shaker and adding quantity of SASC were discussed. The results showed that the best preparation process of SASC were as follows： The concentration of sodium alginate was 1.5% , the ratio of adding SC was 2% , the concentration of CaCl2 was 1% , the time of crosslinking was 0. 5 h. The removal efficiencies of copper under the best condition for SASC could reach 98.73% , when the pH value was 5, the temperature was 30 ℃ , speed of the shaker was 150 r/min, adding quantity of SASC was 0.24 g/mg and the adsorption time was 4 h. The adsorption kinetics of copper by SASC followed the second-order kinetics model very well and adsorption equilibria were well described by the Freundlich isotherm model, which indicated that the process was a muhilayer adsorption.

关 键 词：污泥 生物质炭 固定化 吸附 铜离子 

分 类 号：X703[环境科学与工程—环境工程]