期刊论文

Effect of adsorption of cadmium from aqueous solution by hexadecyl trimethyl ammonium bromide modified biochar

Tie, B.

中文

环境工程学报

1673-9108

2019

13

8

1809-1821

10.12030/j.cjee.201811145

(20160606,20160610):农业部、财政部专项 (2017YFD0801505):国家重点研发计划

本校为第一且通讯机构

针对水体重金属污染治理问题,通过十六烷基三甲基溴化铵(CTAB)对竹炭(BC)、椰壳炭(CSC)进行改性,采用傅里叶红外变换光谱(FT-IR)、扫描电镜(SEM)、X射线光电子能谱分析(XPS)和热稳定性分析(TGA)对改性前后的材料进行了表征,探究了投加量、pH对2种改性材料吸附去除水中镉离子性能的影响,并进行了动力学方程拟合及等温吸附模型拟合,探讨了CTAB改性前后活性炭吸附水中镉离子的机理。结果表明:2种CTAB改性材料基本结构虽未改变,但提升了竹炭(BC)和椰壳炭(CSC)的吸附性能,改性后材料的饱和吸附量分别为12.56 mg·g~(-1)(CTAB-BC)、10.71 mg·g~(-1)(CTAB-CSC),较改性前分别提高了111%和92%;同时, CTA...

In this study, two kinds of biocarbons were prepared by modifying bamboo charcoal (BC) and coconut shell charcoal (CSC) with hexadecyl trimethyl ammonium bromide (CTAB) for heavy metal pollution control. FT-IR, SEM, XPS and TGA were used to characterize the charcoals before and after modification. The effects of dosage and pH on the adsorption performance for cadmium ion from aqueous solution by the modified biochar were investigated, and the adsorption behaviors were simulated by dynamic and isothermal adsorption models. Their corresponding ad...