Abstract: Sludge-based activated carbon was prepared by orthogonal experiment with residual activated sludge from petrochemical enterprises as precursor and applied to the adsorption of toluene in typical VOCs gas. The results showed that the SAC prepared at 613 ℃, 1∶2 solid-liquid ratio, 4 mol/L activator concentration, 15 ℃/min heating rate and 70 min carbonization time had the best performance. The gas-phase adsorption capacity of low concentration toluene on the unit mass (g) sample reached 232.830 mg. Meanwhile, SEM, BET, FT-IR, XRD, TEM and other characterizations of SAC prepared without activator and under optimal conditions were analyzed and compared, and the changes of element contents in sludge and SAC were compared. The results showed that the activated SAC had abundant pore structure, increased specific surface area, increased surface acidic functional groups, increased carbon content and excellent toluene adsorption. SAC was prepared by drying excess activated sludge from petrochemical enterprises and toluene gas was adsorbed. The purpose of “turning waste into treasure” and resource utilization was realized.
李石, 邢亚彬, 赵东风, 宋坤莉, 杜改平, 王永强, 顾莹莹. 石化企业剩余活性污泥基活性炭制备及吸附甲苯气体的研究[J]. 材料导报, 2020, 34(16): 16066-16071.
LI Shi, XING Yabin, ZHAO Dongfeng, SONG Kunli, DU Gaiping, WANG Yongqiang, GU Yingying. Study on Preparation of Activated Carbon Based on Excess Activated Sludge and Adsorption of Toluene Gas in Petrochemical Enterprises. Materials Reports, 2020, 34(16): 16066-16071.
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2020, Vol. 34 
