Abstract：
The impact of functionality of biochar on pressing environmental issue of cadmium (Cd) and lead (Pb) co-contamination in simultaneous soil and water systems has not sufficiently reported. This study investigated the impact of Fe- and Mg-functionalized wheat straw biochar (Fe-WSBC and Mg-WSBC) on Cd and Pb adsorption/immobilization through batch sorption and column leaching trials. Importantly, Fe-WSBC was more effective in adsorbing Cd and Pb (82.84 and 111.24 mg g-1), regeneration ability (removal efficiency 94.32 and 92.365), and competitive ability under competing cations (83.15 and 84.36%) compared to other materials (WSBC and Mg-WSBC). The practical feasibility of Fe-WSBC for spiked river water verified the 92.57% removal of Cd and 85.73% for Pb in 50 mg L-1 and 100 mg L-1 contamination, respectively. Besides, the leaching of Cd and Pb with Fe-WSBC under flow-through conditions was lowered to (0.326 and 17.62 mg L-1), respectively as compared to control (CK) (0.836 and 40.40 mg L-1). In short, this study presents the applicable approach for simultaneous remediation of contaminated water and soil matrices, offering insights into environmentally friendly green remediation strategies for heavy metals co-contaminated matrices.
摘要：
生物炭的功能性对同时存在的土壤和水系统中镉（Cd）和铅（Pb）共同污染的紧迫环境问题的影响尚未得到充分报道。本研究通过分批吸附和柱浸试验，研究了Fe和Mg功能化的小麦秸秆生物炭（Fe-WSBC和Mg-WSBC）对Cd和Pb吸附/固定的影响。重要的是,Fe-WSBC更有效地吸附Cd和Pb（82.84和111.24mgg-1），再生能力（去除效率94.32和92.365），与其他材料（WSBC和Mg-WSBC）相比，在竞争阳离子下的竞争能力（83.15％和84.36％）。Fe-WSBC对加标河水的实际可行性验证了在50mgL-1和100mgL-1污染中Cd的去除率为92.57％，Pb的去除率为85.73％，分别。此外,在流通条件下，Fe-WSBC对Cd和Pb的浸出降低到（0.326和17.62mgL-1），分别与对照（CK）（0.836和40.40mgL-1）相比。总之,这项研究提出了同时修复受污染的水和土壤基质的适用方法，提供对重金属共污染基质的环保绿色修复策略的见解。
