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Hydrochar and pyrochar for sorption of pollutants in wastewater and exhaust gas: A critical review
Environmental Pollution ( IF 6.792 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.envpol.2020.115910
Ziyun Liu; Zihan Wang; Hongxu Chen; Tong Cai; Zhidan Liu

Pollutants in wastewater and exhaust gas bring out serious concerns to public health and the environment. Biochar can be developed as a sustainable adsorbent originating from abundant bio-wastes, such as agricultural waste, forestry residue, food waste and human waste. Here we highlight the state-of-the-art research progress on pyrochar and hydrochar for the sorption of pollutants (heavy metal, organics, gas, etc) in wastewater and exhaust gases. The adsorption performance of pyrochar and hydrochar are compared and discussed in-depth, including preparation procedures (carbonization and activation), sorption possible mechanisms, and physiochemical properties. Challenges and perspective for designing efficient and environmental benign biochar-based adsorbents are finally addressed.

更新日期:2020-11-21
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