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Phototrophic periphyton techniques combine phosphorous removal and recovery for sustainable salt-soil zone

文献类型： 外文期刊

作者： Lu, Haiying 1 ; Feng, Yanfang 1 ; Wu, Yonghong 3 ; Yang, Linzhang 1 ; Shao, Hongbo 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Nanjing 210014, Jiangsu, Peoples R China

2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China

3.Chinese Acad Sci No, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China

关键词： P removal mechanism;Periphyton;Bioadsorption;Co-precipitation;P recovery

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

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收录情况： SCI

摘要： The P (P-i as KH2PO4 and P-o as ATP) removal processes by phototrophic periphyton were investigated by determining the removal kinetics, metal content (Ca, Mg, Al, Fe, Cu, and Zn) of the solution and P fractions (Labile-P, Fe/Al-P, Ca-P, and Res-P) within the periphyton. Results showed that the periphyton was able to remove completely both P-i and P-o after 48 h when periphyton content was greater than 0.2 g L-1 (dry weight). The difference between P-i and P-o removal was the conversion of P-o into P-i by the periphyton, after that the removal mechanism was similar. The P removal mechanism was mainly due to the adsorption on the surfaces of the periphyton, including two aspects: i) the adsorption of PO43- onto metal salts such as calcium carbonate (similar to 50%) and ii) complexation between PO43- and metal cations such as Ca2+ (similar to 40%). However, this bio-adsorptional process was significantly influenced by the extracellular polymeric substance (EPS) of periphyton, water hardness, initial P concentration, temperature and light intensity. This study not only deepens the understanding of P biogeochemical process in aquatic ecosystem, but provides a potential biomaterial for combining phosphorous removal and recovery from non-point source wastewaters, especially around salt-soil zone. (C) 2016 Elsevier B.V. All rights reserved.

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[1]Periphyton growth reduces cadmium but enhances arsenic accumulation in rice (Oryza sativa) seedlings from contaminated soil. Shi, Gao Ling,Ma, Hong Xiang,Lu, Hai Ying,Liu, Jun Zhuo,Wu, Yong Hong,Lou, Lai Qing,Tang, Xian Jin.

[2]The adsorption process during inorganic phosphorus removal by cultured periphyton. Lu, Haiying,Yang, Linzhang,Shabbir, Sadaf,Wu, Yonghong,Yang, Linzhang,Shabbir, Sadaf.

[3]The effect of periphyton on seed germination and seedling growth of rice (Oryza sativa) in paddy area. Lu, Haiying,Liu, Junzhuo,Wu, Yonghong,Lu, Haiying,Shao, Hongbo,Kerr, Philip G..

[4]Responses of periphyton morphology, structure, and function to extreme nutrient loading. Lu, Haiying,Feng, Yanfang,Yang, Linzhang,Lu, Haiying,Feng, Yanfang,Wu, Yonghong,Yang, Linzhang,Lu, Haiying,Shao, Hongbo,Wang, Jinhua.

[5]Periphytic biofilm: A buffer for phosphorus precipitation and release between sediments and water. Lu, Haiying,Wan, Juanjuan,Li, Jiuyu,Wu, Yonghong,Lu, Haiying,Shao, Hongbo,Wan, Juanjuan.

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