Pathan Shabnam, Bose Suryasarathi
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
ACS Omega. 2018 May 31;3(5):5910-5917. doi: 10.1021/acsomega.8b00236.
In the recent times, scanty access to clean water has been one of the most prevalent problems, affecting humankind throughout the world. This calls for a tremendous amount of research to recognize new methods of purifying water at lower cost, minimizing the use of hazardous chemicals and impact on the environment. The interest of the scientific community in the potential applications of renewable feedstock-based hydrogels for heavy-metal adsorption for water remediation has been continuously increasing during the last few decades. This study is an effort to highlight the application of hydrogels for revolutionizing the present research on heavy-metal adsorption, particularly arsenic. Besides, the arsenic chemistry, health hazards of arsenic to human health, and adsorption of arsenic by natural polymer-based hydrogels have been reviewed in detail. In addition, challenges in taking the hydrogel technology forward and future prospectives like cost, handling, and disposal of the adsorbent have been discussed systematically.
近年来，获得清洁水的机会匮乏一直是最普遍的问题之一，影响着全世界的人类。这就需要进行大量研究，以识别低成本净化水的新方法，尽量减少有害化学物质的使用以及对环境的影响。在过去几十年中，科学界对基于可再生原料的水凝胶在重金属吸附用于水修复方面的潜在应用的兴趣一直在持续增加。本研究旨在突出水凝胶在革新当前重金属吸附研究，特别是砷吸附研究方面的应用。此外，还详细综述了砷的化学性质、砷对人类健康的危害以及天然聚合物基水凝胶对砷的吸附。此外，还系统地讨论了推进水凝胶技术所面临的挑战以及吸附剂的成本、处理和处置等未来前景。
