Extraction of sediment-associated polycyclic aromatic hydrocarbons with granular activated carbon

被引:27
|
作者
Rakowska, M. I. [1 ]
Kupryianchyk, D. [2 ]
Grotenhuis, T. [1 ]
Rijnaarts, H. H. M. [1 ]
Koelmans, A. A. [2 ,3 ]
机构
[1] Wageningen Univ, Dept Agrotechnol & Food Sci, Subdept Environm Technol, NL-6700 AP Wageningen, Netherlands
[2] Wageningen Univ, Dept Environm Sci, Aquat Ecol & Water Qual Management Grp, NL-6700 AP Wageningen, Netherlands
[3] Wageningen UR, Inst Marine Resources & Ecosyst Studies, Ijmuiden, Netherlands
关键词
Sorption; Sediment remediation; Granular activated carbon; Polycyclic aromatic hydrocarbons; ENVIRONMENTAL BLACK CARBON; SOOT-LIKE MATERIALS; SAN-FRANCISCO BAY; POLYCHLORINATED-BIPHENYLS; SURFACE-CHEMISTRY; PCB BIOAVAILABILITY; ORGANIC-COMPOUNDS; SORPTION; ADSORPTION; AMENDMENT;
D O I
10.1002/etc.2066
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Addition of activated carbon (AC) to sediments has been proposed as a method to reduce ecotoxicological risks of sediment-bound contaminants. The present study explores the effectiveness of granular AC (GAC) in extracting polycyclic aromatic hydrocarbon (PAH) from highly contaminated sediments. Four candidate GAC materials were screened in terms of PAH extraction efficiency using single-step 24-h GAC extractions, with traditional 24-h Tenax extraction as a reference. Subsequently, sorption of native PAHs to the best performing GAC 1240W (0.451.70?mm) was studied for sediment only and for GACsediment mixtures at different GACsediment weight ratios, using 76-mu m polyoxymethylene (POM) passive samplers. Granular AC sorption parameters for PAHs were determined by subtracting the contribution of PAH sorption to sediment from PAH sorption to the GACsediment mixture. It appears that the binding of PAHs and the effectiveness of GAC to reduce sediment porewater concentrations were highly dependent on the GACsediment mixing ratio and hydrophobicity of the PAH. Despite the considerable fouling of GAC by organic matter and oil, 50 to 90% of the most available PAH was extracted by the GAC during a 28-d contact time, at a dose as low as 4%, which also is a feasible dose in field-scale applications aimed at cleaning the sediment by GAC addition and removal. Environ. Toxicol. Chem. 2013;32:304311. (C) 2012 SETAC
引用
收藏
页码:304 / 311
页数:8
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