Enhanced PCBs sorption on biochars as affected by environmental factors: Humic acid and metal cations

Environmental Pollution
Yu WangDongmei Zhou

Abstract

Biochar plays an important role in the behaviors of organic pollutants in the soil environment. The role of humic acid (HA) and metal cations on the adsorption affinity of polychlorinated biphenyls (PCBs) to the biochars in an aqueous medium and an extracted solution from a PCBs-contaminated soil was studied using batch experiments. Biochars were produced with pine needles and wheat straw at 350 °C and 550 °C under anaerobic condition. The results showed that the biochars had high adsorption affinity for PCBs. Pine needle chars adsorbed less nonplanar PCBs than planar ones due to dispersive interactions and separation. Coexistence of HA and metal cations increased PCBs sorption on the biochars accounted for HA adsorption and cation complexation. The results will aid in a better understanding of biochar sorption mechanism of contaminants in the environment.

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Citations

Dec 15, 2015·Ecotoxicology and Environmental Safety·Bojia SheZhi Dang
Jan 27, 2015·Chemosphere·Xiaofei TanZhongzhu Yang
Oct 16, 2018·Environmental Technology·Wen HuangJianqiang Zhang
May 18, 2019·Environmental Science and Pollution Research International·Zhi TangYe Tang
Mar 2, 2017·Environmental Science and Pollution Research International·Fengsong ZhangLingsheng Yang
Mar 14, 2018·Environmental Science and Pollution Research International·Shixiang DaiWenjie Ren
Nov 13, 2017·Environmental Science and Pollution Research International·Juan WuEric Pokeung Tsang
Nov 7, 2020·Journal of Hazardous Materials·Yuxing FanXiaoming Zou
May 16, 2019·The Science of the Total Environment·Danielle L GelardiSanjai J Parikh
Sep 20, 2020·Journal of Hazardous Materials·Catarina MalheiroSusana Loureiro
Aug 23, 2021·Journal of Hazardous Materials·Basanta Kumar BiswalRajasekhar Balasubramanian

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