摘要
采用水解中和法制备了针铁矿,并进行了其吸附模拟废水中磷的实验研究。结果表明,时间对针铁矿吸附磷有很大影响,210 min达到吸附平衡;向50 mL 5 mg/L的含磷废水中投加1.0 g吸附剂,可去除磷90%;溶液初始酸碱性对吸附效果有显著影响,酸性溶液有利于吸附,当pH值为3时,去除率达到最高;针铁矿对磷的吸附受温度影响较小;可以用Langmuir吸附等温式描述针铁矿对磷的吸附行为,吸附动力学可以用准二级动力学方程来描述。
Goethite were prepared by hydrolysis neutralization method,the adsorption of phosphorus on goethite was investigated. The results showed that: the adsorption time has significant effect on goethite adsorbing phosphorus,the adsorption equilibrium time is 210 min; for 50 mL 5 mg/L phosphorus wastewater,adding 1. 0 g goethite,the phosphorus removal rate is up to 90%; the solution initial pH has obvious influence on goethite adsorbing phosphorus,acidic conditions is good for adsorbing,the removal rate is the highest when pH is 3; temperature has small influence on goethite adsorbing phosphorus; the adsorption of phosphorus on goethite fits with Langmuir isothermal equation,the adsorption kinetics could be described by the pseudo-second order model.
出处
《应用化工》
CAS
CSCD
北大核心
2017年第11期2116-2118,2122,共4页
Applied Chemical Industry
基金
国家自然科学基金项目(41372236)
关键词
针铁矿
含磷废水
吸附
吸附动力学
goethite
phosphorus wastewater
adsorption
adsorption kinetics
