通过化学和热激活改善城市固体废物热解生物炭的表面性质：工艺参数优化及环境应用。
Improving the surface properties of municipal solid waste-derived pyrolysis biochar by chemical and thermal activation: Optimization of process parameters and environmental application.
机构信息
Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, 1101 Quezon City, Philippines.
Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, 1101 Quezon City, Philippines; Department of Chemical Engineering, University of the Philippines Diliman, 1101 Quezon City, Philippines.
出版信息
Waste Manag. 2018 Feb;72:255-264. doi: 10.1016/j.wasman.2017.11.038. Epub 2017 Dec 1.
Biochar produced from the slow pyrolysis of municipal solid waste was activated with KOH and thermal treatments to enhance its surface and adsorptive properties. The effects of KOH concentration, activation temperature and time on the specific surface area (SSA) of the activated biochar were evaluated and optimized using central composite design (CCD) of the response surface methodology (RSM). Results showed that the activation of biochar enhanced its SSA from 402.8 ± 12.5 to 662.4 ± 28.6 m g. The adsorptive capacities of the pristine biochar (PBC) and activated biochar (ABC) were compared using methylene blue (MB) dye as model compound. For MB concentrations up to 25 mg L, more than 99% dye removal was achieved with ABC, while only a maximum of 51% was obtained with PBC. Results of the isotherm study showed that the Langmuir model best described MB adsorption on ABC with adsorption capacity of 37.0-41.2 mg g.
采用 KOH 和热解处理对城市固体废物的慢速热解生物炭进行活化，以提高其表面和吸附性能。利用响应面法（RSM）的中心组合设计（CCD）评价和优化了 KOH 浓度、活化温度和时间对活化生物炭比表面积（SSA）的影响。结果表明，生物炭的活化使其 SSA 从 402.8±12.5 增加到 662.4±28.6 m²/g。采用亚甲基蓝（MB）染料作为模型化合物比较了原始生物炭（PBC）和活化生物炭（ABC）的吸附能力。对于浓度高达 25 mg/L 的 MB，ABC 可实现超过 99%的染料去除，而 PBC 最多只能达到 51%。等温线研究结果表明，Langmuir 模型能很好地描述 ABC 对 MB 的吸附，其吸附容量为 37.0-41.2 mg/g。
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