Biochar-driven reduction of As(V) and Cr(VI): Effects of pyrolysis temperature and low-molecular-weight organic acids.
作者： Junhao Qin , Qiwen Li , Yanqing Liu , Anyi Niu , Chuxia Lin
DOI: 10.1016/J.ECOENV.2020.110873
关键词:
摘要: Batch experiments were conducted to examine the differential effects of biochar pyrolysis temperature and low-molecular-weight organic acids on reduction As(V) Cr(VI) driven by Pennisetum hydridum biochar. The results showed that significantly affected reducing strength Biochar produced at 500 °C had a stronger electron-donating capacity than did biochars 300 700 °C. In co-presence acid, arsenic chromium behaved differently. Oxalic acid malic tended have better enhancing biochar-driven reduction, as compared citric while opposite was observed for reduction. more favourable higher-temperature in presence acids. This may make lower-temperature ideal remediating contaminated soils containing both since it could maximize minimizing
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