College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
Bioresour Technol. 2019 Nov;291:121840. doi: 10.1016/j.biortech.2019.121840. Epub 2019 Jul 18.
Three types of raw biochar (i.e. CBC, OBC, PBC produced from cornstalk, orange peel and peanut hull, respectively) and the modified ones (i.e., KMnO-, KOH- and HPO-treatment) were employed to activate HO for the removal of tetracycline (TC). The effects of pyrolysis temperatures, HO concentration and initial pH were examined. TC removal by raw biochars w/o HO was dependent on the feedstock and pyrolysis temperature of biochar, but the removal efficiency was still quite low under optimum conditions. The KMnO-treatment significantly enhanced the adsorption of TC on all three biochars, but only enhanced the TC removal by CBC + HO. The KOH-treatment had insignificant effect on the adsorption of TC on biochar, but improved the performance of CBC/PBC + HO. The HPO-treatment had a negative impact on TC removal by biochar w/o HO. Overall, HO could either enhance or decrease the TC removal by biochar, depending on biochar type, HO concentration and solution pH.
三种原始生物炭（即分别由玉米秸秆、橙皮和花生壳制成的 CBC、OBC 和 PBC）及其改性产物（即 KMnO4-、KOH-和 H3PO4-处理）被用于活化 HO 以去除四环素（TC）。考察了热解温度、HO 浓度和初始 pH 的影响。无 HO 的原始生物炭去除 TC 取决于生物炭的原料和热解温度，但在最佳条件下去除效率仍然很低。KMnO4-处理显著增强了所有三种生物炭对 TC 的吸附，但仅增强了 CBC+HO 对 TC 的去除。KOH-处理对生物炭上 TC 的吸附影响不大，但提高了 CBC/PBC+HO 的性能。H3PO4-处理对无 HO 的生物炭去除 TC 有负面影响。总的来说，HO 可以增强或降低生物炭对 TC 的去除，具体取决于生物炭类型、HO 浓度和溶液 pH。
