Influence of physical and chemical parameters on the treatment of heavy metals in polluted stormwater using zeolite - A review
Influence of physical and chemical parameters on the treatment of heavy metals in polluted stormwater using zeolite - A review
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DOI：
10.4236/jwarp.2011.310086
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发表时间：
2011-10
期刊：
影响因子：
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通讯作者：
Abdul M. Ziyath;Parvez Mahbub;A. Goonetilleke;M. Adebajo;S. Kokot;A. Oloyede
中科院分区：
文献类型：
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作者：
Abdul M. Ziyath;Parvez Mahbub;A. Goonetilleke;M. Adebajo;S. Kokot;A. Oloyede
基于沸石的技术可以为雨水处理提供具有成本效益的解决方案，以去除有毒重金属，以满足对替代来源的安全水的日益增长的需求。本文综述了目前有关沸石性质（如孔径、表面积和硅铝比）以及体系物理化学条件（如pH、温度、初始金属浓度和沸石浓度）对重金属去除性能影响的知识。主要目标是巩固现有知识并确定知识差距。研究表明，深入了解金属离子扩散到沸石孔隙结构中、孔隙堵塞、雨水中颗粒对沸石表面的覆盖以及沸石存在下 pH 对雨水质量的影响等操作问题，对于开发基于沸石的污染雨水处理技术至关重要。处理典型量的雨水的最佳沸石浓度和雨水中的初始重金属浓度也应被视为这方面的操作问题。此外，铝和钠离子从沸石结构浸出到溶液中被认为是需要进一步研究的关键问题，以开发从雨水中去除重金属的具有成本效益的解决方案。
Zeolite-based technology can provide a cost effective solution for stormwater treatment for the removal of toxic heavy metals under increasing demand of safe water from alternative sources. This paper reviews the currently available knowledge relating to the effect of properties of zeolites such as pore size, surface area and Si:Al ratio and the physico-chemical conditions of the system such as pH, temperature, initial metal concentration and zeolite concentration on heavy metal removal performance. The primary aims are, to consolidate available knowledge and identify knowledge gaps. It was established that an in-depth understanding of operational issues such as, diffusion of metal ions into the zeolite pore structure, pore clogging, zeolite surface coverage by particulates in stormwater as well as the effect of pH on stormwater quality in the presence of zeolites is essential for developing a zeolite-based technology for the treatment of polluted stormwater. The optimum zeolite concentration to treat typical volumes of stormwater and initial heavy metal concentrations in stormwater should also be considered as operational issues in this regard. Additionally, leaching of aluminium and sodium ions from the zeolite structure to solution were identified as key issues requiring further research in the effort to develop cost effective solutions for the removal of heavy metals from stormwater.