水泥浆粉去除废水中铅离子效果及行为研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (2): 616-624.

水泥浆粉去除废水中铅离子效果及行为研究

常辉, 崔素萍, 王亚丽, 刘世杰, 徐海英, 时晓轩

北京工业大学材料与制造学部,北京 100124

收稿日期:2021-08-24 修回日期:2021-10-27 出版日期:2022-02-15 发布日期:2022-03-01
通讯作者: 崔素萍,博士,教授。E-mail:cuisuping@bjut.edu.cn
作者简介:常辉(1997—),男,硕士研究生。主要从事生态环境材料的研究。E-mail:changhuihpuer@163.com
基金资助:
国家自然科学基金创新研究群体项目(51621003)

Effect and Behavior of Cement Slurry Powder in Removing Lead Ion from Wastewater

CHANG Hui, CUI Suping, WANG Yali, LIU Shijie, XU Haiying, SHI Xiaoxuan

Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China

Received:2021-08-24 Revised:2021-10-27 Online:2022-02-15 Published:2022-03-01

摘要/Abstract

摘要： 水泥浆粉含有可吸附重金属离子的成分,可作为吸附剂来处理重金属离子废水。本文利用硅酸盐水泥制备了不同水化龄期的水泥浆粉来处理含Pb²⁺废水,通过X射线衍射仪、同步热分析仪、电感耦合等离子体发射光谱仪等测试方法,研究了水泥浆粉龄期、浆粉用量、Pb²⁺浓度、pH值、温度、时间对Pb²⁺去除效果及吸附行为的影响。结果表明,水泥浆粉对废水中的Pb²⁺去除率普遍大于80%。在35 ℃、pH=2、吸附时间200 min时,0.04 g水灰比为0.50、水化龄期为60 d的水泥浆粉对初始浓度为700 mg/L的Pb²⁺溶液的Pb²⁺去除率为96.06%,吸附容量为336.22 mg/g。水泥浆粉对Pb²⁺的吸附热力学符合Freundlich吸附等温模型,吸附动力学符合拟一级动力学模型。

关键词: 水泥浆粉, C-S-H凝胶, 铅离子废水, 吸附, 吸附热力学, 吸附动力学

Abstract: Cement slurry powder contains components that can adsorb heavy metal ions, which can be used as adsorbent to treat wastewater containing heavy metal ions. In this experiment, ordinary Portland cement was used to prepare cement slurry powder with different hydration ages to treat wastewater containing Pb²⁺. The effects of age and dosage of cement slurry powder, Pb²⁺ concentration, pH value, temperature and adsorption time on Pb²⁺ removal effect and adsorption behavior were studied by means of X-ray diffraction, synchronous thermal analyzer and inductively coupled plasma. The test results show that the removal rate of lead ion in wastewater by cement slurry powder is generally greater than 80%. When 0.04 g cement slurry powder with water cement ratio of 0.50 and hydration age of 60 d is used for Pb²⁺ solution with initial concentration of 700 mg/L at 35 ℃, pH=2 and adsorption time of 200 min, the Pb²⁺ removal rate is 96.06% and the adsorption capacity is 336.22 mg/g. Through the study of adsorption thermodynamics and adsorption kinetics, it can be obtained that the adsorption thermodynamics of cement slurry powder for Pb²⁺ conforms to Freundlich adsorption isothermal model, and the adsorption kinetics conforms to pseudo first-order kinetic model.

Key words: cement slurry powder, C-S-H gel, lead ion wastewater, adsorption, adsorption thermodynamics, adsorption kinetics

中图分类号:

TQ172

常辉, 崔素萍, 王亚丽, 刘世杰, 徐海英, 时晓轩. 水泥浆粉去除废水中铅离子效果及行为研究[J]. 硅酸盐通报, 2022, 41(2): 616-624.

CHANG Hui, CUI Suping, WANG Yali, LIU Shijie, XU Haiying, SHI Xiaoxuan. Effect and Behavior of Cement Slurry Powder in Removing Lead Ion from Wastewater[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 616-624.

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