An Integrated Precipitation-Electrodeposition-Electrodialysis Strategy for Efficient Close-Loop Recovery of Multiple Anions from Phosphogypsum Leachate

Li, Danhao1,3; Lou, Xiang-Yang2; Wang, Jingfu1,4; Wang, Dengjun5; Liao, Peng1,4; Hu, Xinping1,4; Shi, Peng3; Yang, Jiaojiao1,4; Chen, Jingan1,4; Liang, Jiaxin2; Chen, Hong2

2024-04-01

10.1021/acsestengg.4c00083

ACS ES&T ENGINEERING   影响因子和分区

2690-0645

The high concentration anions, including fluoride (F-), phosphorus (PO43-), and sulfate (SO42-), in phosphogypsum (PG) leachates from various landfill sites raise significant environmental concerns. Herein, we propose a combined strategy with chemical precipitation, electrodeposition, and electrodialysis for efficient close-loop recovery of these anions. This approach enabled a recovery rate of 95% for F-, 99% for PO43-, and 99% for SO42- with the resulting obtained products of AlF3/Ca-5(PO4)(3)F/AlPO4, Co-3(PO4)(2), and Na3FSO4/Na2SO4/CaSO4. Via this process, the concentrations of F-, PO43-, and SO42- anions in the effluent were lowered down to 0.14, 0.37, and 0.51 mgL-1, respectively, meeting the water discharge standards set by the phosphate fertilizer industry in China (F- < 15 mgL-1, TP < 10 mgL-1). Economic analysis indicated that processing 1 ton of PG leachate can yield a net profit of $4.62. Our proposed innovative closed-loop process not only provides a green and sustainable approach to treating the huge amount of PG leachates and properly addressing the global PG pollution problem but also offers valuable insights on the sequence recovery of multiple anions in PG leachates.

phosphogypsum leachate phosphorus electrodeposition electrodialysis anions resource utilization

ESCI

英语

通讯

Central Leading Local Science and Technology Development Fund Project[[2023]034] ; Guizhou Provincial Science and Technology Program (Qiankehe Platform Talents-YQK)[2021YFC3201000] ; National Key RD Plan of China[XDB40020400] ; Strategic Priority Research Program of CAS["41977296","42277253"] ; Chinese NSF[20214028] ; Central Leading Local Science and Technology Development Fund Project[KFJSTSQYZD202124001] ; Science and Technology Service Plan of CAS[2023B1212060002] ; Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2019389]

Engineering

Engineering, Environmental

WOS:001199605900001

AMER CHEMICAL SOC

Web of Science

1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut C, Shenzhen 518055, Peoples R China
3.Xian Univ Technol, Xian 710048, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Auburn Univ, Sch Fisheries Aquaculture & Aquat Sci, Auburn, AL 36849 USA

Li, Danhao,Lou, Xiang-Yang,Wang, Jingfu,et al. An Integrated Precipitation-Electrodeposition-Electrodialysis Strategy for Efficient Close-Loop Recovery of Multiple Anions from Phosphogypsum Leachate[J]. ACS ES&T ENGINEERING,2024.

Li, Danhao.,Lou, Xiang-Yang.,Wang, Jingfu.,Wang, Dengjun.,Liao, Peng.,...&Chen, Hong.(2024).An Integrated Precipitation-Electrodeposition-Electrodialysis Strategy for Efficient Close-Loop Recovery of Multiple Anions from Phosphogypsum Leachate.ACS ES&T ENGINEERING.

Li, Danhao,et al."An Integrated Precipitation-Electrodeposition-Electrodialysis Strategy for Efficient Close-Loop Recovery of Multiple Anions from Phosphogypsum Leachate".ACS ES&T ENGINEERING (2024).