Straw biochar activated persulfate oxidation and degradation of phenol
YAO Shu-Hua, MA Xi-Chun, LI Shi-Feng
Liaoning Engineering Research Center for Treatment and Recycling of Industrially Discharged Heavy Metals, Shenyang University of Chemical Technology, Shenyang 110142, China
Persulfate (PS) oxidative degradation of phenol in an aqueous solution was studied in the presence of sorghum-straw biochar (S-BC). The effects of critical parameters, including sodium persulfate (PS) concentration, dose of catalyst, and the initial pH, were investigated. The results show that the ratio of phenol degradation in S-BC/PS system is obviously better than those of single S-BC and PS. The maximum removal efficiency of phenol reached 99.7% with PS/phenol molar ratio of 50:1, S-BC dosage of 1.5g/L, initial pH of 11and reaction time of 15h. Radical mechanism was studied and two radical scavengers (methanol (MA), tert-butanol (TBA)) were used to determine the kind of major active species taking part in the degradation of phenol. Finally, the recovery performance of S-BC was studied through the S-BC reuse experiments. In summary, the method of activating PS with S-BC may offer great benefits in remediation of phenol-contaminated water.
姚淑华, 马锡春, 李士凤. 秸秆生物炭活化过硫酸盐氧化降解苯酚[J]. 中国环境科学, 2018, 38(11): 4166-4172.
YAO Shu-Hua, MA Xi-Chun, LI Shi-Feng. Straw biochar activated persulfate oxidation and degradation of phenol. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(11): 4166-4172.
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