硅藻土对废水中重金属的吸附探讨  

Adsorption of heavy metals from wastewater by diatomite

作　　者：凌静[1] 何少华[1] 文竹青[1] 邝应林[1] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421001

出　　处：《矿业工程》2011年第6期48-50,共3页Mining Engineering

摘　　要：天然硅藻土经过几种方法改性后,吸附能力可得到较大增强,其中溴化十六烷基三甲铵改性硅藻土对水中重金属的去除率可达99%以上。pH、温度、重金属的初始浓度以及吸附剂投加量等都能影响硅藻土对重金属的吸附效果。硅藻土对重金属的吸附机理主要有微孔吸附与表面吸附,其吸附等温式一般可用Langmuir与Freundlich等温线模型来描述。The adsorption ability of diatomite is greatly enhanced after modification of raw diatomite by several methods, and the diatomite modified by Brominated ammonium cetyl 3 armour has stronger adsorption with the removal rate of over 99%. The adsorption of heavy metal on diatomite is strongly dependent on pH, temperature, initial concentration and dosing quantity. The adsorption mechanisms of diatomite mainly include micropore sorption and surface sorption. The Langmuir model and the Freundlich model are applied to describe the sorption isothermal.

关 键 词：硅藻土 重金属 吸附 

分 类 号：X703[环境科学与工程—环境工程]