Islam Md Monjurul, Mohana Anika Amir, Rahman Md Aminur, Rahman Mahbubur, Naidu Ravi, Rahman Mohammad Mahmudur
Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, Islamic University, Kushtia 7003, Bangladesh.
Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia.
Toxics. 2023 Mar 8;11(3):252. doi: 10.3390/toxics11030252.
Chromium (Cr) exists in aqueous solution as trivalent (Cr) and hexavalent (Cr) forms. Cr is an essential trace element while Cr is a dangerous and carcinogenic element, which is of great concern globally due to its extensive applications in various industrial processes such as textiles, manufacturing of inks, dyes, paints, and pigments, electroplating, stainless steel, leather, tanning, and wood preservation, among others. Cr in wastewater can be transformed into Cr when it enters the environment. Therefore, research on Cr remediation from water has attracted much attention recently. A number of methods such as adsorption, electrochemical treatment, physico-chemical methods, biological removal, and membrane filtration have been devised for efficient Cr removal from water. This review comprehensively demonstrated the Cr removal technologies in the literature to date. The advantages and disadvantages of Cr removal methods were also described. Future research directions are suggested and provide the application of adsorbents for Cr removal from waters.
铬(Cr)在水溶液中以三价(Cr³⁺)和六价(Cr⁶⁺)形式存在。三价铬是一种必需的微量元素,而六价铬是一种危险的致癌元素,由于其在各种工业过程中的广泛应用,如纺织、油墨、染料、涂料和颜料制造、电镀、不锈钢、皮革、鞣制和木材防腐等,在全球范围内备受关注。废水中的三价铬进入环境后可转化为六价铬。因此,近年来关于从水中去除六价铬的研究备受关注。人们已经设计了许多方法,如吸附、电化学处理、物理化学方法、生物去除和膜过滤等,用于从水中高效去除六价铬。本文综述全面展示了迄今为止文献中的六价铬去除技术。还描述了六价铬去除方法的优缺点。提出了未来的研究方向,并介绍了用于从水中去除六价铬的吸附剂的应用。