吉林大学学报(理学版)

• 环境科学 • 上一篇    下一篇

化学修饰型PRB反应介质草炭土的制备及性能

党江艳, 张玉玲, 董甜姿   

  1. 吉林大学 环境与资源学院, 水资源与环境研究所, 长春 130021
  • 收稿日期:2013-09-16 出版日期:2014-03-26 发布日期:2014-03-20
  • 通讯作者: 张玉玲 E-mail:zhangyl8@jlu.edu.cn

Preparation and Performance of Chemical ModifiedPeat of PRB Reaction Media

DANG Jiangyan, ZHANG Yuling, DONG Tianzi   

  1. College of Environment and Resources, Institute of Water Resources and Environment,Jilin University, Changchun 130021, China
  • Received:2013-09-16 Online:2014-03-26 Published:2014-03-20
  • Contact: ZHANG Yuling E-mail:zhangyl8@jlu.edu.cn

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+,Na3C6 H5O7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0.100 mol/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2.04 g/g; 吸附动力学规律遵循准二级动力学方程, 吸附60 min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.

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

Abstract:

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,CH3COOH,Mg2+, sodium citrate, PO3-4, 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.

Key words:  , peat; petroleum contaminated; groundwater; permeable reactive barrier (PRB) repair; chemical reagent

中图分类号: 

  • X523