Henan Province Engineering Research Center for Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
PETRONAS Research Sdn. Bhd. (PRSB), Lot 3288 & 3289, off Jalan Ayer Itam, Kawasan Institusi Bangi, 43000 Kajang, Selangor, Malaysia.
Bioresour Technol. 2022 Sep;360:127588. doi: 10.1016/j.biortech.2022.127588. Epub 2022 Jul 6.
The valorization of biochar as a green and low-cost adsorbent provides a sustainable alternative to commercial wastewater treatment technologies that are usually chemical intensive and expensive. This review presents an in-depth analysis focusing on the rice straw-derived biochar (RSB) for removal of various types of contaminants in wastewater remediation. Pyrolysis is to date the most established technology to produce biochar. Subsequently, biochar is upgraded via physical, chemical or hybrid activation/modification techniques to enhance its adsorption capacity and robustness. Thus far, acid-modified RSB is able to remove metal ions and organic compounds, while magnetic biochar and electrochemical deposition have emerged as potential biochar modification techniques. Besides, temperature and pH are the two main parameters that affect the efficiency of contaminants removal by RSB. Lastly, the limitations of RSB in wastewater remediation are elucidated based on the current advancements of the field, and future research directions are proposed.
将生物炭作为一种绿色且低成本的吸附剂进行增值利用，为通常需要大量使用化学物质且成本高昂的商业废水处理技术提供了一种可持续的替代方案。本综述深入分析了以稻秸为原料的生物炭（RSB）在废水修复中去除各种类型污染物的应用。热解是目前生产生物炭最成熟的技术。随后，通过物理、化学或混合激活/改性技术对生物炭进行升级，以提高其吸附能力和稳定性。到目前为止，酸改性 RSB 能够去除金属离子和有机化合物，而磁性生物炭和电化学沉积已成为潜在的生物炭改性技术。此外，温度和 pH 是影响 RSB 去除污染物效率的两个主要参数。最后，根据该领域的最新进展，阐明了 RSB 在废水处理中的局限性，并提出了未来的研究方向。
