Wang Shaobin, Wu Hongwei
Department of Chemical Engineering, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia.
J Hazard Mater. 2006 Aug 25;136(3):482-501. doi: 10.1016/j.jhazmat.2006.01.067. Epub 2006 Mar 13.
Fly ash is a waste substance from thermal power plants, steel mills, etc. that is found in abundance in the world. In recent years, utilisation of fly ash has gained much attention in public and industry, which will help reduce the environmental burden and enhance economic benefit. In this paper, the technical feasibility of utilisation of fly ash as a low-cost adsorbent for various adsorption processes for removal of pollutants in air and water systems has been reviewed. Instead of using commercial activated carbon or zeolites, a lot of researches have been conducted using fly ash for adsorption of NO(x), SO(x), organic compounds, and mercury in air, and cations, anions, dyes and other organic matters in waters. It is recognised that fly ash is a promising adsorbent for removal of various pollutants. Chemical treatment of fly ash will make conversion of fly ash into a more efficient adsorbent for gas and water cleaning. Investigations also revealed that unburned carbon component in fly ash plays an important role in adsorption capacity. Directions for future research are also discussed.
粉煤灰是一种来自火力发电厂、钢铁厂等的废弃物，在世界范围内大量存在。近年来，粉煤灰的利用在公众和工业界备受关注，这将有助于减轻环境负担并提高经济效益。本文综述了将粉煤灰用作低成本吸附剂用于各种吸附过程以去除空气和水系统中污染物的技术可行性。许多研究使用粉煤灰替代商业活性炭或沸石来吸附空气中的氮氧化物、硫氧化物、有机化合物和汞，以及水中的阳离子、阴离子、染料和其他有机物。人们认识到粉煤灰是一种有前途的用于去除各种污染物的吸附剂。对粉煤灰进行化学处理将使其转化为用于气体和水净化的更高效吸附剂。研究还表明，粉煤灰中未燃尽的碳成分在吸附能力方面起着重要作用。本文还讨论了未来的研究方向。
