Bed and suspended sediment-associated rare earth element concentrations and fluxes in a polluted Brazilian river system

被引：23

作者：

Agra Bezerra da Silva, Yuri Jacques ^{[1
]}

Araujo do Nascimento, Clistenes Williams ^{[2
]}

Agra Bezerra da Silva, Ygor Jacques ^{[2
]}

Amorim, Fabio Farias ^{[2
]}

Barros Cantalice, Jose Ramon ^{[2
]}

Singh, Vijay P. ^{[3
]}

Collins, Adrian L. ^{[4
]}

机构：

[1] Fed Univ Piaui UFPI, Agron Dept, BR-64900000 Bom Jesus, PI, Brazil

[2] Fed Rural Univ Pernambuco UFRPE, Agron Dept, Dom Manuel Medeiros St S-N Dois Irmaos, BR-52171900 Recife, PE, Brazil

[3] Texas A&M Univ, Zachry Dept Civil Engn, Biol & Agr Engn Dept, College Stn, TX 77843 USA

[4] Rothamsted Res, Sustainable Agr Sci, North Wyke EX20 2SB, Okehampton, England

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2018年 / 25卷 / 34期

基金：

英国生物技术与生命科学研究理事会;

关键词：

Lanthanides; Environmental quality; Sediment-associated transport; Watershed management; Water quality; Bedload; ANTHROPOGENIC GADOLINIUM; CHEMICAL-COMPOSITION; MANDOVI ESTUARY; IPOJUCA RIVER; WATER; FRACTIONATION; GEOCHEMISTRY; TRACE; YTTRIUM; SOILS;

D O I：

10.1007/s11356-018-3357-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Rare earth elements (REEs) have been recently recognized as emergent pollutants in rivers. However, data regarding REE fluxes in association with either bed or suspended are scarce. To address this knowledge gap, we determined the concentrations and fluxes of La, Ce, Pr, Nd, Sm, Eu, Gd, Yb, Lu, Dy, Er, Ho, Tb, and Tm in bed and suspended sediment samples of a representative polluted Brazilian River. Sediment-associated data on REEs were placed in the context of corresponding background concentrations in soils under natural conditions along the Ipojuca watershed. Light rare earth elements (LREEs) comprised more than 94% of the total REEs associated with bed and suspended sediments. Suspended sediments accounted for more than 95% of the total REE flux. The Ce and Nd fluxes of about 7tyear(-1) underscore the importance of including REEs in future estimations of global suspended sediment-associated element fluxes. In contrast, bedload often transported less than 0.0007tyear(-1) of each REE. The main sources of pollution in the Ipojuca River are anthropogenic, likely due to domestic effluent and waste water from industrial and agricultural operationsmajor causes of sediment-associated Gd transport in polluted streams.

引用

页码：34426 / 34437

页数：12

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