文献类型：期刊文献

英文题名：Phosphate distribution and sources in the waters of Huangbai River, China: using oxygen isotope composition of phosphate as a tracer

作者：Wei, Kai[1,2];Zeng, Xiongwei[1,2];Wang, Chuanshang[1,2];Peng, Zhongqin[1,2];Wang, Jianpo[1,2];Zhou, Fengxia[3,4,5];Chen, Fajin[3,4,5]

机构：[1]China Geol Survey, Wuhan Ctr, Wuhan 430205, Peoples R China;[2]Hubei Key Lab Paleontol & Geol Environm Evolut, Wuhan 430205, Peoples R China;[3]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental, Zhanjiang 524088, Peoples R China;[5]Guangdong Ocean Univ, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China

年份：2021

卷号：28

期号：23

起止页码：29732

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000616913700016)、、EI(收录号：20242616373278)、Scopus(收录号：2-s2.0-85100761934)、WOS

基金：This work was supported by the Project of China Geological Survey (grant number DD20190823), the Open Fund of Hubei Key Laboratory of Paleontology and Geological Environment Evolution (grant number PEL-202001) and the Foundation for Young Talents in General Colleges and Universities of Guangdong Province (grant number 2019KQNCX044).

语种：英文

外文关键词：Phosphate; Phosphate oxygen isotopes; Tracing sources; Phosphate ore; River waters

外文摘要：We investigated the distributions of phosphate (PO4-P) and used the oxygen isotope composition of phosphate (delta O-18(P)) to quantify PO4-P sources in the waters of Huangbai River. According to the environmental characteristics of Huangbai River basin, the sampling stations in the Huangbai River were divided into three groups: sampling stations in the phosphate mining area, in the outcrop area of phosphate rock, and in the residential/agricultural area. The average PO4-P concentration was highest (2.34 +/- 1.00 mu mol/L) in the outcrop area of phosphate ore, intermediate in the residential/agricultural area (1.06 +/- 1.21 mu mol/L), and lowest in the phosphate mining area (0.58 +/- 0.31 mu mol/L). The delta O-18(P) measured in the Huangbai River waters ranged from 6.0 to 20.9 parts per thousand, with the highest average value in the outcrop area of phosphate rock (average: 14.6 parts per thousand +/- 3.1 parts per thousand). The majority of the measured delta O-18(P) values in the Huangbai River deviated greatly from the expected equilibrium values, indicating that delta O-18(P) in this area could be used to trace PO4-P sources. We used two end-member mixing models to quantify the contribution of PO4-P from different sources. In the phosphate mining area, the average fractions of PO4-P from phosphate ore and sewage were 49.5% +/- 23.8% and 50.5% +/- 23.8%, respectively. In the outcrop area of phosphate rock, the average fractions of PO4-P from phosphate ore and sewage were 60.1% +/- 21.7% and 39.9% +/- 21.7%, respectively. In the residential/agricultural area, the average fractions of PO4-P from fertilizer and sewage were 49.2% +/- 23.2% and 50.8% +/- 23.2%, respectively. These results indicate that phosphate mining activities was not an important source for PO4-P in the waters of Huangbai River. The natural weathering of phosphate rock, fertilization, and domestic sewage contributed more to the high PO4-P concentrations in the Huangbai River waters.