Cheng Ning, Wang Bing, Wu Pan, Lee Xinqing, Xing Ying, Chen Miao, Gao Bin
College of Resources and Environment Engineering, Guizhou University, Guiyang, Guizhou, 550025, China.
College of Resources and Environment Engineering, Guizhou University, Guiyang, Guizhou, 550025, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang, Guizhou, 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, Guizhou, 550025, China.
Environ Pollut. 2021 Jan 6;273:116448. doi: 10.1016/j.envpol.2021.116448.
Emerging contaminants (ECs), a group of relatively low-concentration but high-toxicity pollutants in the environment, have attracted widespread attention in recent years. These trace pollutants can be enriched in organisms and finally transferred to human bodies, posing a potential hazard to public health. Biochar, a low-cost and high-efficiency adsorbent, has been used to treat ECs in water. However, due to certain limitations of pristine biochar, such as poor adsorption capacity, narrow adsorption range, and other shortcomings, it is necessary to modify biochar to improve its applications in water treatment for ECs. Currently, there are a lot of reports on the removal of ECs from water by modified biochar. These studies explored different modification methods to functionalize biochar with various physicochemical properties, which resulted in distinct adsorption effects, behaviors and mechanisms of modified biochar on different ECs. There is a need to systematically review and digest the knowledge on the adsorption of ECs on modified biochar. In this review, recent biochar modification methods used in ECs removal are firstly summarized, and the adsorption performance and mechanisms of modified biochar on typical ECs are then systematically reviewed. Finally, the main research directions and trends, as well as recommendations and suggestions for future development are pointed out.
新兴污染物（ECs）是环境中一类浓度相对较低但毒性较高的污染物，近年来受到了广泛关注。这些痕量污染物可在生物体内富集并最终转移至人体，对公众健康构成潜在危害。生物炭作为一种低成本、高效率的吸附剂，已被用于处理水中的新兴污染物。然而，由于原始生物炭存在某些局限性，如吸附能力差、吸附范围窄等缺点，有必要对生物炭进行改性，以改善其在新兴污染物水处理中的应用。目前，关于改性生物炭去除水中新兴污染物的报道很多。这些研究探索了不同的改性方法，以使生物炭具有各种物理化学性质，从而导致改性生物炭对不同新兴污染物具有不同的吸附效果、行为和机制。有必要系统地综述和消化有关新兴污染物在改性生物炭上吸附的知识。在本综述中，首先总结了近年来用于去除新兴污染物的生物炭改性方法，然后系统地综述了改性生物炭对典型新兴污染物的吸附性能和机制。最后，指出了主要的研究方向和趋势，以及对未来发展的建议。
