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硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (1): 172-179.

所属专题: 资源综合利用

• 资源综合利用 • 上一篇    下一篇

无机有机联合改性海泡石对苯的吸附特性研究

方佳浚1, 任子杰1,2, 高惠民1,2, 周贤武1, 周鹏1   

  1. 1.武汉理工大学资源与环境工程学院,武汉 430070;
    2.矿物资源加工与环境湖北省重点实验室,武汉 430070
  • 收稿日期:2020-08-17 修回日期:2020-10-09 出版日期:2021-01-15 发布日期:2021-02-07
  • 通讯作者: 任子杰,博士,副教授。E-mail:renzijie@whut.edu.cn
  • 作者简介:方佳浚(1998—),男,硕士研究生。主要从事分子动力学模拟的研究。E-mail:528836259@qq.com
  • 基金资助:
    国家重点研发计划(2017YFB0310803)

Adsorption Properties of Inorganic and Organic Modified Sepiolite to Benzene

FANG Jiajun1, REN Zijie1,2, GAO Huimin1,2, ZHOU Xianwu1, ZHOU Peng1   

  1. 1. School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China;
    2. Hubei Provincial Key Laboratory of Mineral Resources and Environment,Wuhan 430070,China
  • Received:2020-08-17 Revised:2020-10-09 Online:2021-01-15 Published:2021-02-07

摘要: 室内的苯污染主要由装修、装饰材料引起,苯作为一级致癌物,长时间接触会引起许多慢性疾病,如何降低室内苯污染的问题已越来越受到广泛关注。有研究证明海泡石可用于土壤、水和大气污染治理,因此对提纯海泡石进行了水热改性、酸改性和水热酸浸联合无机改性,而后进行三甲氧基苯基硅烷(PTMOS)有机改性,并对改性海泡石吸附苯的性能和机理进行了研究。研究结果表明:对于水热酸浸联合无机改性,其最佳条件为0.6 MPa水热压力处理8 h后,用体积分数为10%的盐酸处理8 h,得到的海泡石对苯的去除率较原矿提高72.36%;表面有机改性最佳处理条件为PTMOS用量0.3 mmol·g-1,改性时间为6 h,得到的海泡石对苯的去除率较原矿提高159.03%,表面有机改性得到的海泡石吸附效果最好。三甲氧基苯基硅烷改性海泡石(PTMOS-SP)对苯的吸附适合用Langmuir等温线模型、准二级动力学模型和粒子内扩散模型来描述,苯在PTMOS-SP表面的吸附过程包含三个阶段:外表面扩散阶段、孔隙内扩散阶段和吸附平衡阶段。

关键词: 海泡石, 苯吸附, 吸附材料, 无机有机联合改性, 吸附等温线

Abstract: Indoor benzene pollution is mainly caused by decoration and decoration materials.As a first-level carcinogen,prolonged exposure to benzene will cause many chronic diseases.How to reduce indoor benzene pollution has attracted more and more attention.Many studies have proved that sepiolite can be used for soil pollution treatment,water pollution treatment and air pollution treatment.So the purified sepiolite was modified by hydrothermal modification,acid modification and hydrothermal acid leaching methods combine inorganic modification and organic modification of trimethoxyphenylsilane (PTMOS).The performance and mechanism of modified sepiolite adsorbing benzene gas were studied.The results show that the best condition for hydrothermal acid leaching methods combined inorganic modification is 0.6 MPa hydrothermal pressure treatment for 8 h,then treated by hydrochloric acid with a volume fraction of 10% for 8 h.The removal rate of sepiolite to benzene is 72.36% higher than that of rude ore.The best treatment condition for surface organic modification is 0.3 mmol·g-1 of PTMOS,and the modification time of 6 h.The removal rate of sepiolite to benzene is 159.03% higher than that of rude ore.The surface organic modification has better adsorption effect than the sepiolite obtained by hydrothermal acid leaching combined modification.The adsorption of benzene by PTMOS-SP is suitable for Langmuir isotherm model,quasi-second-order kinetic model and intraparticle diffusion model.The adsorption process of benzene on the surface of PTMOS-SP consists of three stages:the outer surface diffusion stage,the pore diffusion stage,and the adsorption equilibrium stage.

Key words: sepiolite, benzene adsorption, adsorption material, combined inorganic and organic modification, adsorption isotherm

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