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地球科学进展  2003, Vol. 18 Issue (4): 626-631    DOI: 10.11867/j.issn.1001-8166.2003.04.0626
研究论文     
阴离子捕获剂及其在污染防治与环境修复领域中的应用
郑丽波1,叶瑛2,韩晓非1,季珊珊2,冯璐珈2
1.华东师范大学地理系,上海 200062;2.浙江大学地球科学系,浙江 杭州 310027
ANION GETTER AND ITS UTILIZATION IN POLLUTION PREVENTION AND ENVIRONMENT REMEDIATION
Zheng Libo1, Ye Ying2,Han Xiaofei1,Ji Shanshan2, Feng Lujia2
1.Geographical Department, East China Normal University, Shanghai 200062, China;
2.Department of Earth Science, Zhejiang University, Hangzhou 310027, China
 全文: PDF(82 KB)  
摘要:

综述了阴离子捕获剂的结构、性能、制备与表征方法、吸附专属性及其在环境修复方面的应用。阴离子捕获剂是一种具有层状结构的阴离子粘土,由于其特殊的结构和性能,可通过层间阴离子交换、层状结构重建等机制来吸附环境中的阴离子,从而清除环境中的污染物。大量研究表明,阴离子捕获剂对环境中以络阴离子形式存在的重金属污染物有很强的吸附能力,并能有效吸附水体中的 N、P、As、Se和放射性元素。此外,阴离子捕获剂还能吸附有机污染物,如农药、酚类化合物、洗涤剂和腐殖质等。从环境中除去不同类型的有毒有害组分,需使用不同类型的阴离子捕获剂。其吸附能力主要由捕获剂本身的特点和外部理化条件所决定。阴离子捕获剂的研究已成为当前环境保护工程和技术研究的一个新热点。

关键词: 阴离子捕获剂环境修复吸附专属性    
Abstract:

    Recent progress made on anion getter was summarized in this article, including the preparation techniques, characterization methods, adsorption performance, and their applicability in the environment remediation. Hydrotalcite (HT)-like compounds and other layered double hydroxides (LDHs) with similar structure are effective anion getter. The crystal structure of HT-like compounds consists of brucite-like positively charged layers, compensated with negatively charged interlayers containing anions and water molecules. The general formula of these compounds is as follows:
                                                                        [M1-xMx(OH)2] An-x/nmH2O
Where M=Mg2+,Zn2+,Fe2+, and other divalent cations; MIII= Al3+,Fe3+, and other trivalent cations; An-= CO2-3, Cl-, NO-3, SO2-4 and other anions;xvaries between 0.2 and 0.33.
    One of the most important properties of the HT-like compounds is the high anionic exchange capacity, related to their lamellar structure that allows the exchange of its original anions with those present in aqueous solution. On the other hand, Mg-Al mixed oxide, obtained by calcination of HT-like compounds at about 500℃,adsorbed anions from water through the reconstruction of their layered structure. Both processes, anion exchange and layer reconstruction, may be affected by HT structural characteristics such as interlayer anion and crystallinity.
    Recent research confirms that anion getter is capable to absorb heavy-metal contamination, which exists in the environment as complexing anions. Anion getter also absorbs N, P, As, Se and radioactive elements in the water, as well as organic compounds, such as pesticide, herbicide, phenolic agents, washing agents and humus.To remove different poisonous and nocuous components in the environment, we need different anion getters,which depends on the getter’s own characteristics, and the exterior physiochemical conditions. The research on the anion getter has been a hotspot for environment protection in recent years.

Key words: Anion getter    Adsorption performance    Environment remediation.
收稿日期: 2002-09-23 出版日期: 2003-08-01
:  X142  
通讯作者: 郑丽波     E-mail: libozheng@sina.com
作者简介: 郑丽波(1973-),女,浙江余姚人,博士研究生,主要从事环境污染化学、环境工程研究.E-mail:libozheng@sina.com
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引用本文:

郑丽波,叶瑛,韩晓非,季珊珊,冯璐珈. 阴离子捕获剂及其在污染防治与环境修复领域中的应用[J]. 地球科学进展, 2003, 18(4): 626-631.

Zheng Libo, Ye Ying,Han Xiaofei,Ji Shanshan, Feng Lujia. ANION GETTER AND ITS UTILIZATION IN POLLUTION PREVENTION AND ENVIRONMENT REMEDIATION. Advances in Earth Science, 2003, 18(4): 626-631.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2003.04.0626        http://www.adearth.ac.cn/CN/Y2003/V18/I4/626

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