Ahmaruzzaman Md
Department of Chemistry, National Institute of Technology Silchar, Assam, 788010, India.
Adv Colloid Interface Sci. 2008 Nov 4;143(1-2):48-67. doi: 10.1016/j.cis.2008.07.002. Epub 2008 Jul 22.
Adsorption techniques are widely used to remove certain classes of pollutants from wastewater. Phenolic compounds represent one of the problematic groups. Although commercial activated carbon is a preferred adsorbent for phenol removal, its widespread use is restricted due to the high cost. As such, alternative non-conventional adsorbents have been investigated. The natural materials, waste materials from industry and agriculture and bioadsorbents can be employed as inexpensive adsorbents. The review (i) presents a critical analysis of these materials; (ii) describes their characteristics, advantages and limitations; and (iii) discusses the various mechanisms involved. There are several issues and drawbacks concerned on the adsorption of phenolic compounds that have been discussed in this review article. It is evident from the review that low-cost adsorbents have demonstrated high removal capabilities for certain phenolic compounds. In particular, industrial waste might be a promising adsorbent for environmental and purification purposes.
吸附技术被广泛用于去除废水中的某些类污染物。酚类化合物是有问题的污染物类别之一。尽管商业活性炭是去除苯酚的首选吸附剂，但其广泛应用因成本高而受到限制。因此，人们研究了替代性的非常规吸附剂。天然材料、工农业废料和生物吸附剂都可以用作廉价吸附剂。本综述：（i）对这些材料进行了批判性分析；（ii）描述了它们的特性、优点和局限性；（iii）讨论了所涉及的各种机制。本文综述了酚类化合物吸附方面存在的若干问题和缺点。从综述中可以明显看出，低成本吸附剂对某些酚类化合物具有很高的去除能力。特别是，工业废料可能是用于环境和净化目的的一种很有前景的吸附剂。
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