氯化锌改性污泥基生物炭的制备及对As(III)的吸附特性研究
Preparation of Sludge-Based Biochar Modified by Zinc Chloride and Its Adsorption Characteristics for As(III)
DOI: 10.12677/ag.2026.169119, PDF,    科研立项经费支持
作者: 郭 硕, 潘红忠, 廉晶晶*：长江大学资源与环境学院，湖北 武汉
关键词: 污泥基生物炭；改性；吸附；砷；Sludge Based Biochar； Modification； Adsorbent； Arsenic
摘要: 为了改进城市剩余污泥的资源化利用方式，本文以污水处理厂剩余污泥为原料，在高温条件下制备污泥基生物炭(W1)，同时通过氯化锌溶液进行改性获得污泥基生物炭(H2)，并采用FTIR、SEM、BET等方法对污泥基生物炭进行表征，研究了污泥基生物炭改性前后对As(III)的吸附特性。结果表明，H2相比于W1，孔隙度和比表面积增大，含氧官能团的数量增多，表面所带电荷数增多等，对As(III)的吸附效能更好。W1更符合准一级反应动力学，而H2对准二级反应学拟合系数更高。污泥基生物炭对As(III)的吸附以Langmuir模型为主，吸附过程主要是生物炭表面的单分子层吸附。
Abstract: In order to improve the resource utilization of urban surplus sludge, this paper used the surplus sludge of sewage treatment plant as raw material to prepare sludge based biochar (W1) under high temperature conditions, and obtained sludge based biochar (H2) through the modification of zinc chloride solution, using FTIR, SEM and BET to characterize sludge based biochar, and the adsorption characteristics of As(III) before and after modification of sludge based biochar were studied. The results showed that compared with W1, the porosity and the specific surface area of H2 increased, the number of oxygen-containing functional groups and the number of surface charges increased, which improved the adsorption efficiency of As(III). W1 was more consistent with the quasi-first-order reaction kinetics, while H2 had a higher fitting coefficient of quasi-second-order reaction. The adsorption of As(III) by sludge based biochar was mainly based on Langmuir model, and the adsorption process was mainly the single-molecular layer adsorption on the surface of biochar.
文章引用：郭硕, 潘红忠, 廉晶晶. 氯化锌改性污泥基生物炭的制备及对As(III)的吸附特性研究[J]. 地球科学前沿, 2026, 16(9): 1339-1349. https://doi.org/10.12677/ag.2026.169119

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