Phosphorus speciation in sewage sludge and the sludge-derived biochar by a combination of experimental methods and theoretical simulation

Li, Mi1,2; Tang, Yuanyuan1,3; Lu, Xiao-Ying4; Zhang, Zuotai1,3; Cao, Yiming2

2018-09

10.1016/j.watres.2018.04.039

WATER RESEARCH   影响因子和分区

0043-1354

Sewage sludge is an inevitable byproduct from municipal wastewater treatment processes and conversion of sewage sludge into high value-added biochar is an effective strategy for resource utilization of sewage sludge. The characterization on P speciation is important to control the practical applications and environmental behavior of the sewage sludge and its derived biochar. The mobility and bioavailability of P is closely related to its speciation, but knowledge gap in P speciation is still existed which needs to be narrowed by a systematic study including existing experimental methods and techniques as well as theoretical prediction. To achieve a comprehensive understanding of P speciation, this study conducted a series of research combining conventional fractionation of P with consideration of major concomitant elements (Al, Ca, Fe), advanced analytical techniques (solution and solid-state P-31 nuclear magnetic resonance (NMR), X-ray diffraction (XRD)), and theoretical simulation with respect to solubility of major elements in different acid-base extractants. Results showed that Ca and Fe were dominantly extracted by HCl whereas P and Al were both NaOH- and HCl-soluble. Inorganic orthophosphates were detected as predominant molecular configurations of P from solution P-31 NMR spectra, while the existence of calcium and aluminum orthophosphates was revealed by solid-state P-31 NMR. Moreover, the poor crystalline AIPO(4) mineral was further evidenced by XRD patterns of the sewage sludge and biochar. Finally, a theoretical simulation of P-containing minerals was performed on the basis of results above. which suggested the existence of variscite/berlinite and amorphous Ca-3(PO4)(2) in the sludge and biochar. This study does not only explore the P speciation in the sewage sludge and its derived biochar, but also provides a methodology for further research on P speciation. Through the intensive study on the environmental behavior of P, this work might further contribute to the fundamental knowledge basis for the recycle of P during integrate waste management. (C) 2018 Elsevier Ltd. All rights reserved.

Phosphorus Speciation Sewage sludge Biochar Minerals

SCI ; EI

英语

NI论文

第一 ; 通讯

Environment and Conservation Fund Project[22/2016]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000447359000009

PERGAMON-ELSEVIER SCIENCE LTD

20182205252910

Aluminum compounds ; Biochemistry ; Calcium compounds ; Chlorine compounds ; Knowledge based systems ; Minerals ; Nuclear magnetic resonance ; Nuclear magnetic resonance spectroscopy ; Phosphate minerals ; Phosphorus ; Sodium hydroxide ; Waste management ; Wastewater treatment ; X ray diffraction

Sewage Treatment:452.2 ; Industrial Wastes Treatment and Disposal:452.4 ; Minerals:482.2 ; Expert Systems:723.4.1 ; Biochemistry:801.2 ; Chemical Products Generally:804

ENVIRONMENT/ECOLOGY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Lab Adv Chem Engn, DICP, 457 Zhongshan Rd, Dalian, Peoples R China
3.Key Lab Municipal Solid Waste Recycling Technol &, Shenzhen 518055, Peoples R China
4.Technol & Higher Educ Inst Hong Kong, Fac Sci & Technol, Hong Kong, Hong Kong, Peoples R China

Li, Mi,Tang, Yuanyuan,Lu, Xiao-Ying,et al. Phosphorus speciation in sewage sludge and the sludge-derived biochar by a combination of experimental methods and theoretical simulation[J]. WATER RESEARCH,2018,140:90-99.

Li, Mi,Tang, Yuanyuan,Lu, Xiao-Ying,Zhang, Zuotai,&Cao, Yiming.(2018).Phosphorus speciation in sewage sludge and the sludge-derived biochar by a combination of experimental methods and theoretical simulation.WATER RESEARCH,140,90-99.

Li, Mi,et al."Phosphorus speciation in sewage sludge and the sludge-derived biochar by a combination of experimental methods and theoretical simulation".WATER RESEARCH 140(2018):90-99.