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王利平教授课题组在“Journal of Cleaner Production”上发表研究论文

   发布时间: 2019-12-26    访问次数: 12

Synthesis of Mn/Al double oxygen biochar from dewatered sludge for enhancing phosphate removal

Guangfei Peng, Shanqing Jiang, Yuxiang Wang, Qiuya Zhang, Yu Cao, Yiqin Sun,Wenqiang Zhang, Liping Wang

 近日,常州大学环境与安全工程学院王利平教授研究团队在清洁生产领域的国际知名期刊《Journal of Cleaner Production》发表了最新研究成果“Synthesis of Mn/Al double oxygen biochar from dewatered sludge for enhancing phosphate removal”。《Journal of Cleaner Production》是由Elsevier出版、SCI索引的《Journal Citation Reports》中一区期刊,2018年影响因子为6.395,近5年平均影响因子为7.051。

 Abstract: This study presents a simple one-step hydrothermal method to produce a new Mn/Al double oxygen sludge-derived biochar (MA-SBC) from municipal dewatered sludge, which is used for enhancing phosphate removal. Characterization results showed that a cubic spinel-type MnAl2O4 was successfully embedded in the matrix of MA-SBC. A series of systematically designed batch experiments were performed to evaluate the effect of initial pH, contact time, and initial phosphate concentration on the adsorption behavior of MA-SBC. The results revealed that the adsorption process of phosphate onto MA-SBC conformed to a pseudo-second-order model, and the rate of adsorption was mainly dominated by a mechanism of film diffusion. A Langmuir isotherm model accurately described the adsorption isotherm, with a maximum adsorption amount of 28.20 mg-P/g at 298 K (50 mg/L for the initial phosphate solution), which was more efficient than those of previously reported composites. Moreover, X-ray diffraction, Fourier transform infra-red and X-ray photoelectron spectroscopy analyses proved that the potential mechanisms of phosphate removal from aqueous media were the inner-sphere surface complexation reaction of phosphate with M-OH groups and a subsequent precipitation reaction of aluminum phosphate. Cycle stability and metallic ion leaching tests demonstrated the strong stability of MA-SBC. In general, the results of this research suggest that MA-SBC has potential applicability for removing phosphate from aqueous media as an alternative, eco-friendly, and economic adsorbent for environmental restoration.