Key role of the sorption process in alteration of metal and metalloid quantification by fouling development on DGT passive samplers

被引：11
作者：
Devillers, Deiphine [1 ]
Buzier, Remy [1 ]
Grybos, Malgorzata [1 ]
Charriau, Adeline [1 ]
Guibaud, Gilles [1 ]
机构：
[1] Univ Limoges, Res Grp Water Soil & Environm GRESE, 123 Ave Albert Thomas, F-87060 Limoges, France
来源：
ENVIRONMENTAL POLLUTION | 2017年 / 230卷
关键词：
Diffusive gradients in thin films; Biofouling; Trace elements; Freshwater; SITU INTERCOMPARISON EXERCISE; DIFFUSIVE GRADIENTS; FRESH-WATER; THIN-FILMS; SURFACE-COATINGS; TRACE-METALS; ADSORPTION; BIOFILMS; DEVICES; PHASES;
D O I：
10.1016/j.envpol.2017.07.005
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The DGT technique (diffusive gradients in thin films) is widely used for passive sampling of labile trace metals and metalloids in natural waters. Although development of fouling on the protective membranes is frequently observed, its effect on DGT sampling has been barely investigated. This study evaluates the influence of fouling on sampling of trace cationic metals Cd(II), Cu(II), Ni(II) and Pb(II) and oxyanions As(V), Cr(VI), Sb(V) and Se(VI). Fouling was developed in situ on polycarbonate membranes in four diverse natural freshwater environments and sampling alteration was assessed in controlled laboratory experiments. Accumulation of oxyanions and Ni was unaltered in the presence of fouling whereas significant alteration occurred in sampling of Cd, Cu and Pb (at pH similar to 5.4). Characterization of the fouled membranes highlighted the intervention of sorption phenomenon as sampling alteration was systematically observed alongside element sorption onto fouled membrane. A preliminary flowchart for identifying potentially biased quantifications linked to fouling development during in situ DGT deployment in natural waters is proposed. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：523 / 529
页数：7
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