Magnetic biochar composite decorated with amino-containing biopolymer for phosphorus recovery from swine wastewater

文献类型： 外文期刊

第一作者： Zhang, Yichen

作者： Zhang, Yichen;Wu, Weilong;Ali, Amjad;Wang, Quan;Qi, Weidong;Li, Ronghua;Zhang, Zengqiang;Shi, Guozhong;Wang, Hailong;Wang, Hailong;Wang, Quan;Li, Ronghua;Zhang, Zengqiang;Xu, Zhongyang

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关键词： Amino hybrid biochar composite; Adsorption; Phosphorus recovery; Swine wastewater; Fertilizer

期刊名称：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS （ 影响因子：5.518； 五年影响因子：4.746 ）

ISSN： 0927-7757

年卷期： 2022 年 634 卷

页码：

收录情况： SCI

摘要： Amino hybrid biopolymer-decorated magnetic biochar composites (MTBC-2 N and MTBC-4 N) derived from green tea waste were synthesized and employed to recover phosphorus (P) from aqueous solution and swine wastewater, respectively. The amino hybrid biopolymer decoration decreased the surface area of the biochar composites but increased the nitrogen content of the MTBC-2 N and MTBC-4 N samples. The MTBC-2 N and MTBC-4 N remarkably promoted the dephosphorization of P-polluted waters than the raw biochar without amino hybrid biopolymer decoration. The kinetic adsorption of P onto MTBC-2 N and MTBC-4 N was simulated using the pseudo-second-order kinetic model and reached equilibrium within 4 h. The P adsorption isotherm was best fitted by the Langmuir model with the maximum adsorption capacities of 53.56 and 62.06 mg P/g for MTBC-2 N and MTBC-4 N, respectively. The tested MTBC-2 N and MTBC-4 N were regenerated and exhibited acceptable reusability. In addition, the adsorption of P onto MTBC-2 N and MTBC-4 N was regulated by electrostatic attraction and surface complexation processes. More than 88.2% and 96.5% of P were recovered by MTBC-2 N and MTBC-4 N from swine wastewater, respectively. Moreover, the pot experiment showed that the P-loaded biochar composites could potentially be used as alternative P fertilizers.

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