化学修饰型PRB反应介质草炭土的制备及性能  

Preparation and Performance of Chemical Modified Peat of PRB Reaction Media

作　　者：党江艳[1] 张玉玲[1] 董甜姿 

机构地区：[1]吉林大学环境与资源学院,水资源与环境研究所,长春130021

出　　处：《吉林大学学报（理学版）》2014年第2期383-388,共6页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:41203050)

摘　　要：选用11种化学试剂对渗透性反应墙(PRB)反应介质草炭土进行修饰,并分析吸附前后草炭土的微观结构.结果表明:经HCl,NaOH,CH3COOH,Mg2+,Na3C6H5O7和PO3-4修饰后的草炭土吸附总石油烃(TPH)的能力降低;经Ca2+,Fe3+,Cu2+,乙二胺四乙酸(EDTA)和腐植酸修饰后的草炭土吸附TPH的能力升高,其中,经0.100mol/L Ca2+修饰后的草炭土去除地下水中TPH为92.26%,其吸附规律符合Langmuir等温吸附方程,理论最大吸附量为2.04g/g;吸附动力学规律遵循准二级动力学方程,吸附60min后达到动态平衡;草炭土通过物理吸附和化学吸附去除石油污染物.Eleven kinds of chemical reagents were chosen to modify peat to improve its ability of absorbing TPH.The results show that after it was modified by HCl,NaOH,CH 3 COOH,Mg2＋, sodium citrate,PO 3-4 ,the ability of absorbing TPH of peat is reduced,but after modified with Ca2＋, Fe3＋,Cu2＋,EDTA,humic acid,it is improved.After modified with 0.100 mol/L Ca2＋,the remove rate of TPH is as high as 92.26%.The adsorption of it for TPH conforms with the Langmuir isothermal adsorption equation and the maximum adsorption in theory is 2.04 g/g.Its adsorption kinetics model conforms with the second-order kinetics,and 60 min later,the adsorption reaches dynamic equilibrium.Observed results before and after adsorption show that there are both physical and chemical adsorptions in the process of peat for petroleum.

关 键 词：草炭土 石油污染 地下水 渗透性反应墙修复 化学试剂 

分 类 号：X523[环境科学与工程—环境工程]