【引用本文】 王喆, 谭科艳, 梁明会, 等. 天然丝光沸石表面重构改性及其在水中去除重金属的应用[J]. 岩矿测试, 2018, 37(6): 678-686. doi: 10.15898/j.cnki.11-2131/td.201802110018
WANG Zhe , TAN Ke-yan , LIANG Ming-hui , et al. Surface Modification of Natural Mordenite and Its Application in Removal of Heavy Metals from Aqueous Solution[J]. Rock and Mineral Analysis, 2018, 37(6): 678-686. doi: 10.15898/j.cnki.11-2131/td.201802110018

天然丝光沸石表面重构改性及其在水中去除重金属的应用

1. 同济大学土木工程学院, 上海 200092;

2. 自然资源部生态地球化学重点实验室, 国家地质实验测试中心, 北京 100037;

3. 国家纳米科学中心, 北京 100190

收稿日期: 2018-02-11  修回日期: 2018-05-07 

基金项目: 中国地质科学院基本科研业务费项目(YYWF201722;YYWF201617)

作者简介: 王喆,硕士研究生,从事地球化学和环境修复研究。E-mail:495953116@qq.com。。

Surface Modification of Natural Mordenite and Its Application in Removal of Heavy Metals from Aqueous Solution

1. College of Civil Engineering, Tongji University, Shanghai 200092, China;

2. Key Laboratory of Eco-geochemistry, Ministry of Natural Resources;National Research Center for Geoanalysis, Beijing 100037, China;

3. National Center for Nanoscience and Technology, Beijing 100190, China

Received Date: 2018-02-11
Revised Date: 2018-05-07

摘要:天然丝光沸石作为一种绿色廉价多孔材料广泛应用于环境治理中去除重金属,目前报道的天然沸石对重金属的去除率多在60%~90%,提升其去除效率已成为研究热点。本文采用正硅酸乙酯对天然丝光沸石进行表面重构改性,通过TEM、XRD、BET等手段表征其形貌和结构。结果表明:正硅酸乙酯水解生成的SiO2可与天然丝光沸石复合形成新颖的"SiO2/丝光沸石",原沸石表面包覆了新生纳米SiO2孔结构,同时没有损坏原始沸石的多孔结构,使改性沸石材料兼具了天然丝光沸石和纳米SiO2孔结构优点,增强了对重金属离子的吸附能力。该改性材料对水中Pb2+、Cd2+、Zn2+和Mn2+的最高吸附率为99.3%、97.1%、98.3%和97.0%,且极少解吸,性能稳定。考虑经济成本并保证合适吸附率的情况下选择吸附效率最佳的投加量,得到改性材料对初始浓度10 mg/L的Pb2+、Cd2+、Zn2+、Mn2+溶液的最佳投加量分别为0.5 g/L、2 g/L、2 g/L、5 g/L,可为中试和规模应用提供参考。较之焙烧、酸、碱、盐和有机改性,本改性方式对多种重金属均有高的吸附率,并显现出操作简便、成本低和环境友好等优势,具有较好应用前景。

关键词: 天然丝光沸石, 二氧化硅, 改性, 重金属, 吸附

Surface Modification of Natural Mordenite and Its Application in Removal of Heavy Metals from Aqueous Solution

KEY WORDS: natural mordenites, silica, surface modification, heavy metals, adsorption

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天然丝光沸石表面重构改性及其在水中去除重金属的应用

王喆, 谭科艳, 梁明会, 蔡敬怡, 侯士田, 王悦, 江鹏