摘要
采用天然黄铁矿对水中的Cr(Ⅵ)进行吸附去除,考察了Cr(Ⅵ)去除效果的影响因素,并对吸附机理进行了探讨。实验结果表明:黄铁矿吸附去除水中Cr(Ⅵ)的优化条件为黄铁矿过200目筛(粒径小于0.075 mm)、吸附p H 3.0、黄铁矿投加量20 g/L、初始Cr(Ⅵ)质量浓度6 mg/L、吸附温度25℃,此条件下平衡时的Cr(Ⅵ)去除率达90%以上;酸性条件下,黄铁矿对Cr(Ⅵ)的去除效果均较好,且p H越低达到平衡所需时间越短;黄铁矿粒径越小,其对Cr(Ⅵ)的吸附速率越快,平衡时的去除率也越高;黄铁矿对Cr(Ⅵ)的吸附过程符合Langmuir等温吸附模型和Lagergren准二级动力学方程。
Natural pyrite was used to removal Cr （VI） from water by adsorption. The factors affecting Cr （V[） removal were investigated, and the adsorption mechanism was discussed. The experimental results show that： Under the optimum conditions of pyrite size less than 0.075 mm, adsorption pH 3.0, pyrite dosage 20 g/L, initial Cr （Ⅵ） mass concentration 6 mg/L and adsorption temperature 25 ℃, the Cr （Ⅵ） removal rate is above 90%; In acid condition, the Cr （Ⅵ） removal effects of pyrite are good, and the lower pH is, the shorter the adsorption equilibrium time is ; With the decreasing of pyrite particle size, the adsorption rate to Cr （Ⅵ） and the removal rate at adsorption equilibrium are increased; The adsorption process of Cr （Ⅵ） on pyrite fits with the Langmuir isothermal adsorption model and the Lagergren pseudo-second-order kinetics equation.
出处
《化工环保》
CAS
CSCD
北大核心
2016年第5期506-510,共5页
Environmental Protection of Chemical Industry
基金
国家自然科学基金项目(41330639)
中央高校基本科研业务费专项(201522113)
作者简介
[作者简介]万晶晶（1992-），女，湖北省赤壁市人，硕士生，电话13424027760，电邮18270911576@163.com。
联系人：郭楚玲，电话13794306575，电邮clguo@scut．edu．cn。
