钙改性玉米秸秆生物炭同时吸附磷酸盐和四环素：性能与机制。
Simultaneous adsorption of phosphate and tetracycline by calcium modified corn stover biochar: Performance and mechanism.
机构信息
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
出版信息
Bioresour Technol. 2022 Sep;359:127477. doi: 10.1016/j.biortech.2022.127477. Epub 2022 Jun 14.
It is important to solve the problems of biomass treatment and combined contaminants removal in environmental remediation. In this study, a calcium (Ca) modified biochar (CaBC800) was fabricated using corn stover (CS) as a raw material to remove phosphate and tetracycline (TC). The experimental results indicate that CaBC800 can adsorb both inorganic phosphate and organic TC. The entire adsorption process corresponds to pseudo-second-order kinetics and Langmuir adsorption isotherm. The maximum adsorption capacities of phosphate and TC were 33.944 and 33.534 mg/g, respectively. The phosphate adsorption was demonstrated to mainly depend on the chemical precipitation by Ca and ligand exchange by hydroxyl groups from CaBC800. Meanwhile, hydrogen bonding from oxygen functional groups and π-π interactions from aromatic rings are the main adsorption mechanisms of TC. This study provides a new adsorbent to efficiently remove phosphate and TC, and the simultaneous adsorption indicates the application potential of CaBC800 in wastewater remediation.
在环境修复中，解决生物质处理和复合污染物去除问题至关重要。本研究以玉米秸秆（CS）为原料制备了一种钙（Ca）改性生物炭（CaBC800），用于去除磷酸盐和四环素（TC）。实验结果表明，CaBC800 可以同时吸附无机磷酸盐和有机 TC。整个吸附过程符合准二级动力学和 Langmuir 吸附等温线。磷酸盐和 TC 的最大吸附容量分别为 33.944 和 33.534mg/g。磷酸盐的吸附主要取决于 Ca 的化学沉淀和 CaBC800 中羟基的配体交换。同时，来自氧官能团的氢键和来自芳环的π-π相互作用是 TC 的主要吸附机制。本研究提供了一种高效去除磷酸盐和 TC 的新型吸附剂，同时吸附表明 CaBC800 在废水修复中的应用潜力。
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