Department of Chemistry (Centre of Advanced Study), Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India; Centre for Energy and Environmental Sustainability (CEES), Lucknow, 226 029, UP, India.
Chemosphere. 2021 Jun;272:129917. doi: 10.1016/j.chemosphere.2021.129917. Epub 2021 Feb 11.
Application of agrochemicals in farming sector to control insects and pests; and use of synthetic organic dyes to color the products are increasing continuously due to the rapid growth of industries. During the application process many industries releases toxic agrochemicals and dyes in to the aquatic environment and on land without the proper treatment. Due to their toxicity the disposal of such chemicals is of utmost importance. Biochar offers the ability to remediate these substances from environmental matrices because of their high sorption ability of pollutants from water and soil. This review highlights the development and advancement of biochar-based treatment for abatement of agrochemicals and synthetic organic dyes, involving its technical aspects and the variables connected with removing these kinds of pollutants. Several optimization parameters like temperature, pH, chemical concentration, biochar properties, time, and co-existing ions have been elaborated. Literature survey shows that most of the researches on biochar application have been conducted in the batch mode. Hence there is an urgent need to apply this beneficial technique for the remediation of pollutants at the larger scale in the real water and soil samples. A comprehensive summary on sorption kinetics and adsorption isotherms with regards to pollutant removal is also presented. This review also covers the cost analysis of various techniques where biochar has been used as an adsorbent. Thus this review makes an easy roadmap for the further development in biochar and biochar based composites and expansion of these demanding areas of research in biochar and their applications.
由于工业的快速发展，农业部门中用于控制昆虫和害虫的农用化学品的应用，以及用于为产品着色的合成有机染料的应用不断增加。在应用过程中，许多工业企业在未经适当处理的情况下，将有毒农用化学品和染料排放到水和陆地上的环境中。由于这些化学品具有毒性，因此妥善处理这些化学品至关重要。生物炭因其对水和土壤中污染物的高吸附能力，具有修复这些物质的能力。这篇综述重点介绍了基于生物炭的处理方法在减少农用化学品和合成有机染料方面的发展和进步，包括其技术方面以及与去除这些污染物有关的各种变量。已经详细阐述了几个优化参数，如温度、pH 值、化学浓度、生物炭特性、时间和共存离子。文献调查表明，大多数关于生物炭应用的研究都是在批量模式下进行的。因此，迫切需要将这项有益的技术应用于实际水和土壤样品中更大规模的污染物修复。本文还介绍了关于去除污染物的吸附动力学和吸附等温线的综合总结。本综述还涵盖了各种技术的成本分析，其中生物炭被用作吸附剂。因此，本综述为生物炭及其复合材料的进一步发展以及在生物炭及其应用的这些高要求研究领域的扩展提供了一个简单的路线图。
