化工矿物与加工2025，Vol.54Issue(11)：48-58,11.DOI:10.16283/j.cnki.hgkwyjg.2025.11.006
碳化方法对生物炭/地聚物复合材料结构与吸附/钝化性能的影响
Effect of carbonization method on the structure and adsorption/passivation properties of biochar/geopolymer composite materials
摘要
Abstract
Water and soil pollution caused by heavy metal Pb(Ⅱ)has become a global environmental issue.Both biochar and geopolymer materials have shown great application potential in the remediation of Pb(Ⅱ)-contaminated water and soil.In this study,biochar/geopolymer composites were prepared using fly ash and wheat straw as raw materials through mixing,curing,carbonization,and other steps.The effects of two carbonization methods,namely high-temperature oxygen-limited pyrolysis and hydrothermal carbonization,on the microstructure of the prepared composites and their adsorption/passivation properties for Pb(Ⅱ)in water and soil were investigated.The results showed that the pyrolyzed biochar/fly ash geopolymer composite exhibited a large specific surface area(55.0461 m2/g)and abundant pore structure,with an average pore size of 5.2638 nm.The maximum adsorption capacities of the hydrothermally carbonized and pyrolyzed biochar/fly ash geopolymer composites for Pb(Ⅱ)in water were 233.41 mg/g and 306.27 mg/g,respectively.The adsorption processes of both composites conformed to the Langmuir iso-therm model and pseudo-second-order kinetic model,and appropriate temperature increase could promote the adsorp-tion.In addition,both materials showed excellent passivation performance for Pb(Ⅱ)in soil,with 7-day passivation rates of 72.86%and 76.33%,respectively.关键词
地质聚合物/生物炭/复合材料/重金属/吸附/钝化Key words
geopolymers/biochar/composite materials/heavy metals/adsorption/passivation分类
资源环境引用本文复制引用
王宁,贺攀阳,辛楷能,陈天星,张晓民..碳化方法对生物炭/地聚物复合材料结构与吸附/钝化性能的影响[J].化工矿物与加工,2025,54(11):48-58,11.基金项目
国家自然科学基金项目(42272342) （42272342）
陕西省自然科学基金项目(2024JC-YBQN-0330) （2024JC-YBQN-0330）
中国博士后科学基金项目(2022MD713785). （2022MD713785）
