School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Jun;30(29):74127-74140. doi: 10.1007/s11356-023-27653-3. Epub 2023 May 18.
Biochar is regarded as an effective adsorbent for heavy metal pollution treatment, and functional optimization is still needed to improve its performance. We created raw biochar (BC and BP) from corn straw and pine sawdust, which were modified to produce sulfhydryl-modified biochar (MBC and MBP). Isothermal adsorption experiments and adsorption kinetics experiments as well as the related model fitting were performed to evaluate the adsorption performance of biochar on Hg(II). According to the results of the Langmuir model fitting, the maximum adsorption capacities of sulfhydryl-modified biochar were 193.05 mg/g (MBC) and 178.04 mg/g (MBP), respectively, which were approximately 1.6 times higher than the raw biochar. The results showed that adding sulfhydryl groups to biochar can improve its adsorption performance. The prompt effect resulted from the sulfhydryl modification providing additional functional groups and enhanced chemisorption and physical adsorption properties.
生物炭被认为是一种有效的重金属污染处理吸附剂，但仍需要进行功能优化以提高其性能。我们使用玉米秸秆和松木屑制成原始生物炭（BC 和 BP），并对其进行修饰以生产巯基改性生物炭（MBC 和 MBP）。通过等温吸附实验和吸附动力学实验以及相关模型拟合来评估生物炭对 Hg(II)的吸附性能。根据 Langmuir 模型拟合的结果，巯基改性生物炭的最大吸附容量分别为 193.05 mg/g（MBC）和 178.04 mg/g（MBP），分别约为原始生物炭的 1.6 倍。结果表明，向生物炭中添加巯基基团可以提高其吸附性能。由于巯基修饰提供了额外的官能团，因此迅速产生了效果，增强了化学吸附和物理吸附特性。
