典型矿物材料对水中磷吸附性能的对比研究
2020-08-23寇明月刘文静傅玲子刘叶张海涛
寇明月 刘文静 傅玲子 刘叶 张海涛



摘 要:选取凹凸棒土、水滑石、硅藻土三种典型矿物材料作为研究对象,利用单因素实验方法吸附时间、酸碱度等因素对水中磷的吸附影响规律,其结果表明:天然水滑石、凹凸棒土、硅藻土对含磷废水中磷的最佳吸附pH为4.0~5.0,吸附平衡时间为40 min;对比酸改性、热改性以及AlCl3改性前后三种矿物材料的磷吸附性能,总体上呈现酸改性>热改性> AlCl3改性的趋势,对磷的最佳去除率达到99%以上。
关 键 词:矿物材料;除磷;吸附
中图分类号:X52 文献标识码: A 文章编号: 1671-0460(2020)07-1347-05
Comparative Study on the Adsorption Properties of Typical
Mineral Materials for Phosphorus in Water
KOU Ming-yue, LIU Wen-jing, FU Ling-zi, LIU Ye, ZHANG Hai-tao
(Shengli College, China University Petroleum, Dongying Shandong 257061, China)
Abstract: Three typical mineral materials including attapulgite, hydrotalcite and diatomaceous earth were selected as research objects. The effect of adsorption time and pH on the adsorption was investigated by single factor experiment. The results showed that suitable pH for adsorbing phosphorus in phosphorus-containing wastewater was 4.0~5.0, and the adsorption equilibrium time was 40 min. The phosphorus adsorption performances of the three mineral materials before and after acid modification, thermal modification and AlCl3 modification were compared. The results showed that, the modification effect order was as follows: acid modification > thermal modification > AlCl3 modification. The best removal rate of phosphorus was more than 99%.
Key words: Mineral materials; Phosphorus removal; Adsorption
水体富营养化在影响了水资源开发利用的同时,也严重影响了人类和水生动植物的生命活动,是日前突出的主要环境问题之一。有学者研究表明,氮、磷作为导致水体富营养化的两大元凶,磷含量的控制相对于氮含量的控制更为重要[1]。以凹凸棒土、水滑石為代表的矿物材料和硅藻土是物化性质优良的矿物资源,因其具有比表面积大、吸附性能强、来源广、价格低廉等优点,在废水、废气、废渣的处理方面具有重要的应用价值[2-3]。本文选用天然的凹凸棒土、水滑石、硅藻土三种典型矿物材料作为研究对象,研究其在不同条件下对水中磷的吸附效能,通过不同的改性活化方式,探索最佳的改性方法和改性条件。
1 实验部分
1.1 材料
凹凸棒土、水滑石、硅藻土购于河北省灵寿县
1.2 试剂与仪器
试剂:磷酸二氢钾、浓硫酸、钼酸铵、酒石酸锑钾三水合物、氢氧化钠、盐酸购于天津市科密欧化学试剂有限公司,聚合氯化铝购于罗恩试剂公司、抗坏血酸购于天津市大茂化学试剂厂、硝酸银购于国药集团化学试剂有限公司。……
