摘要
考察了石英砂负载氧化铁(IOCS)在不同的实验条件下(无机阴离子种类及其离子强度、pH值、IOCS投加量、温度等)对水溶液中锑的去除效果.结果表明:三种无机阴离子(NO-3,C l-,SO24-)对IOCS吸附锑的去除率、吸附容量以及反应速率几乎没有影响;在pH3—9范围内,锑的去除率达到90%.二级反应动力学模型及Langmu ir等温吸附模型可分别较好地描述锑的吸附动力学及吸附等温线实验结果.随着温度的增加,反应速率以及吸附容量也随之增加.
Removal of antimony （Sb） from aqueous solutions using iron-oxide coated sand （IOCS） was investigated by batch experiments under different conditions in terms of inorganic anion species and ionic strength , pH, dosage and temperature. The experimental results shown that the three tested inorganic anions （NO3^-, Cl^-, SO4^2- ） have little effect on the Sb removal efficiency, adsorption capacity, and adsorption rate. The removal percentages of Sb by IOCS can be achieved about 90% when pH ranged from 3 to 9. The adsorption data obtained from kinetic and isotherm experiments could be well described using second order rate model and Langmuir adsorption isotherm model, respectively. The adsorption rate and capacity increased as temperature increased.
出处
《环境化学》
CAS
CSCD
北大核心
2006年第4期481-484,共4页
Environmental Chemistry
基金
国家自然科学基金(50178029)
博士点基金(20030537370)
科技部国际合作基金(2003DFB00002)资助项目
关键词
负载
氧化铁
锑
吸附.
coated, iron-oxide, antimony, adsorption.
