响应曲面法优化生物质炭去除水溶液中的阿特拉津  

Optimization of Atrazine Removal from Aqueous Solution by Biochar Using Response Surface Methodology

作　　者：刘娜[1] 杨亚冬[1] Alberto Bento Charrua 王航[1] 叶康[1] 吕春欣[1] 

机构地区：[1]吉林大学环境与资源学院,长春130021

出　　处：《吉林大学学报（地球科学版）》2016年第4期1199-1207,共9页Journal of Jilin University：Earth Science Edition

基　　金：吉林省科技厅应用基础研究项目(20130102049JC);吉林大学交叉学科创新项目(JCKY-QKJC20)~~

摘　　要：将农业废弃物大豆秆在450℃缺氧条件下热裂解制备生物质炭。采用元素分析仪、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、光电子能谱分析(XPS)等手段对生物质炭进行理化性质分析;应用响应曲面法(RSM)下的中心合成设计(CCD)功能研究4个因素(初始pH、吸附剂质量浓度、阿特拉津质量浓度、温度)对阿特拉津去除率的影响;建立二阶模型,并通过方差分析验证二阶方程的有效性。结果表明:生物质炭表面充满孔状结构,且富含C=C、C-C、CHx、-C-OR、-COOR等官能团;吸附阿特拉津后生物质炭在羟基(-OH)的位置产生了新的吸收峰,推测羟基官能团在吸附过程中发挥了重要作用。RSM法优化最佳吸附去除阿特拉津条件为:初始阿特拉津质量浓度为5mg/L、pH=6.67,吸附剂质量浓度为7.75g/L、温度为32℃;在该条件下阿特拉津的吸附去除率达到92.18%。该研究可为评价施加生物质炭土壤中阿特拉津的迁移规律及阿特拉津污染水体修复提供参考。The biochar was produced by pyrolyse process under 450 ℃ using soybean stem waste materials.The elemental analyzer,electron microscope scanning（SEM）,transform infrared spectroscopy（FTIR）,x-ray photoelectron spectroscopy（XPS）were applied to analyze the physical and chemical characteristics of biochar.The effects of four factors（initial pH,doge of adsorbent,concentration of atrazine and temperature）on the removal efficiency of atrazine were investigated using central composite design（CCD）under response surface methodology（RSM）.Creating a 2-order equation,and then the ANOVA was employed to verify the validity of the quadratic model.The results showed that the surfaceof biochar was full of pore structures and C=C、C-C、CHx、-C-OR、-COOR functional groups.A new adsorption peak appeared on the-OH position after adsorption of atrazine by biochar.So we speculated that the hydroxyl groups played an important role in the process of adsorption.The optimum adsorption removal（92.18%）by RSM obtained at pH=6.67,the doge of adsorbent 7.75g/L,initial atrazine concentration 5mg/L,T=35 ℃.The research will provide references for the migration regularity of atrazine in biochar-applied soil and the remediation of atrazine polluted water.

关 键 词：生物质炭 响应曲面法 吸附去除 阿特拉津 

分 类 号：X52[环境科学与工程—环境工程]