Raj Vinay, Chauhan Mrityunjay Singh, Pal Sunder Lal
Department of Civil Engineering, Maulana Azad National Institute of Technology, Bhopal, 462003, Madhya Pradesh, India.
Department of Chemical Engineering, Maulana Azad National Institute of Technology, Bhopal, 462003, Madhya Pradesh, India.
Chemosphere. 2022 Nov;307(Pt 2):135825. doi: 10.1016/j.chemosphere.2022.135825. Epub 2022 Aug 7.
Presence of heavy metal (HM) ions in wastewater have emerged as among the most prominent issues for improving water quality and reducing it's consequences for the environment, animal and public health. This paper mainly focuses on the remediation of HM ions from wastewater utilizing the relatively inexpensive and widely accessible agricultural waste-Sugarcane Bagasse (SCB). For this, a brief understanding of HMs was discussed (by understanding the sources and toxicity of HM, advantages and shortcomings of conventional processes). Apart from that, to understand the potential of SCB, this review would provide vital information on employing SCB biosorbent in natural and modified forms for HM removal. Therefore, various ways of SCB modifications (including physical, chemical, and composite formation), essential optimal operational conditions (solution pH, dosage of biosorbent, initial metal concentration, contact time, agitation speed, temperature, suitable isotherm and kinetic model) and involving adsorption mechanism were also studied. Finally, significant study gaps were identified to facilitate future research since SCB has been confirmed as a potential bio-adsorbent for removing HM ions.
废水中重金属（HM）离子的存在已成为改善水质以及减少其对环境、动物和公众健康影响的最突出问题之一。本文主要关注利用相对廉价且易于获取的农业废弃物——甘蔗渣（SCB）来去除废水中的重金属离子。为此，对重金属进行了简要介绍（通过了解重金属的来源和毒性、传统处理方法的优缺点）。除此之外，为了解甘蔗渣的潜力，本综述将提供有关使用天然和改性形式的甘蔗渣生物吸附剂去除重金属的重要信息。因此，还研究了甘蔗渣改性的各种方法（包括物理、化学和复合形成）、基本的最佳操作条件（溶液pH值、生物吸附剂用量、初始金属浓度、接触时间、搅拌速度、温度、合适的等温线和动力学模型）以及涉及的吸附机制。最后，由于甘蔗渣已被确认为去除重金属离子的潜在生物吸附剂，因此确定了重大的研究空白以促进未来的研究。
