Quantification of activated carbon contents in soils and sediments using chemothermal and wet oxidation methods

被引：14
作者：
Brandli, Rahel C. [1 ]
Bergsli, Anders [1 ]
Ghosh, Upal [2 ]
Hartnik, Thomas [3 ]
Breedveld, Gijs D. [1 ,4 ]
Cornelissen, Gerard [1 ,5 ]
机构：
[1] NGI, Dept Environm Engn, N-0806 Oslo, Norway
[2] Univ Maryland Baltimore Cty, Dept Civil & Environm Engn, Baltimore, MD 21250 USA
[3] Norwegian Inst Agr & Environm Res Bioforsk, Soil & Environm Div, N-1432 As, Norway
[4] Univ Oslo, Dept Geosci, N-0316 Oslo, Norway
[5] Stockholm Univ, Dept Appl Environm Sci ITM, S-10691 Stockholm, Sweden
来源：
ENVIRONMENTAL POLLUTION | 2009年 / 157卷 / 12期
关键词：
Soil; Sediment; Activated carbon; Black carbon; Quantification; BLACK CARBON; ORGANIC-MATTER; SOOT; SORPTION; PAH; BIOAVAILABILITY; PCB;
D O I：
10.1016/j.envpol.2009.06.015
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Activated carbon (AC) strongly sorbs organic pollutants and can be used for remediation of soils and sediments. A method for AC quantification is essential to monitor AC (re)distribution. Since AC is black carbon (BC), two methods for BC quantification were tested for AC mixed in different soils and sediments: i) chemothermal oxidation (CTO) at a range of temperatures and ii) wet-chemical oxidation with a potassium dichromate/sulfuric acid solution. For three soils, the amount of AC was accurately determined by CTO at 375 degrees C. For two sediments, however, much of the AC disappeared during combustion at 375 degrees C, which could probably be explained by catalytic effects by sediment constituents. CTO at lower temperatures (325-350 degrees C) was a feasible alternative for one of the sediments. Wet oxidation effectively functioned for AC quantification in sediments, with almost complete AC recovery (81-92%) and low remaining amounts of native organic carbon (5-16%). (C) 2009 Elsevier Ltd. All rights reserved.
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页码：3465 / 3470
页数：6
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