Chromate removal as influenced by the structural changes of soil components upon carbonization at different temperatures

被引：16

作者：

Chen, K. Y. ^{[1
]}

Liu, J. C. ^{[2
]}

Chiang, P. N. ^{[3
]}

Wang, S. L. ^{[1
]}

Kuan, W. H. ^{[4
]}

Tzou, Y. M. ^{[1
]}

Deng, Y. ^{[6
]}

Tseng, K. J. ^{[1
]}

Chen, C. C. ^{[5
]}

Wang, M. K. ^{[7
]}

机构：

[1] Natl Chung Hsing Univ, Dept Soil & Environm Sci, Taichung 40227, Taiwan

[2] Agr Res Inst, Wufong 41301, Taichung County, Taiwan

[3] Natl Taiwan Univ, Nantou 55743, Taiwan

[4] Ming Chi Univ Technol, Dept Safety Hlth & Environm Engn, Taipei 24301, Taiwan

[5] Natl Taiwan Normal Univ, Dept Life Sci, Taipei 116, Taiwan

[6] Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77840 USA

[7] Natl Taiwan Univ, Dept Agr Chem, Taipei 10617, Taiwan

来源：

ENVIRONMENTAL POLLUTION | 2012年 / 162卷

关键词：

Chromate; Carbonization; Reduction; Soil organic matter; ORGANIC-MATTER; CR(VI); FIRE; ADSORPTION; REDUCTION; CHROMIUM; CARBON;

D O I：

10.1016/j.envpol.2011.10.036

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Surface fire could induce heat transferring into the soil, creating a carbonized environment, which may alter the chemical compositions of soil organic matters (SOM). In the study, a surface soil was carbonized at up to 600 degrees C with limited air to simulate soils experiencing a surface fire, and Cr(VI) removal on the carbonized soils was investigated. NMR and FTIR analyses demonstrated a remarkable change of SOM structures at 300-400 degrees C. TGA-MS spectra indicated that (e.g. C2H4, CH3OH and C3H8) were the major components in the evolved gases from the pyrolyzed soil. A maximum amount of Cr(VI) removal (ca. 4 mg g(-1) soil) occurred for the 200 degrees C-carbonized soils, attributed mainly to a significant increase of Cr(VI) reduction by 0.1 M KCl extractable organic carbon (EOC) with abundant carboxylic groups. Nonetheless, the formation of aromatic C upon carbonization of the soil at >400 degrees C may be responsible for Cr(VI) reduction. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：151 / 158

页数：8

共 35 条

[1] Rearrangement of carbon and nitrogen forms in peat after progressive thermal oxidation as determined by solid-state 13C and 15N-NMR spectroscopy [J].

Almendros, G ;

Knicker, H ;

González-Vila, FJ .

ORGANIC GEOCHEMISTRY, 2003, 34 (11) :1559-1568

[2] FIRE-INDUCED TRANSFORMATION OF SOIL ORGANIC-MATTER FROM AN OAK FOREST - AN EXPERIMENTAL APPROACH TO THE EFFECTS OF FIRE ON HUMIC SUBSTANCES [J].

ALMENDROS, G ;

GONZALEZVILA, FJ ;

MARTIN, F .

SOIL SCIENCE, 1990, 149 (03) :158-168

[3]

Bartlett R. J., 1996, Methods of soil analysis. Part 3 - chemical methods., P683

[4] Prescribed fire alters the impact of wildfire on soil biochemical properties in a ponderosa pine forest [J].

Choromanska, U ;

DeLuca, TH .

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 2001, 65 (01) :232-238

[5]

Cotton F. A., 1980, ADV INORGANIC CHEM

[6] Thermal resistance to high temperatures of different organic fractions from soils under pine forests [J].

Fernandez, I ;

Cabaneiro, A ;

Carballas, T .

GEODERMA, 2001, 104 (3-4) :281-298

[7]

Giovannini G., 1993, SOIL BIOTA NUTR CYCL, P279

[8]

Greene-Kelly R., 1957, The Differential Thermal Investigations of Clays, P140

[9] ADSORPTION AND DESORPTION OF NATURAL ORGANIC-MATTER ON IRON-OXIDE - MECHANISMS AND MODELS [J].

GU, BH ;

SCHMITT, J ;

CHEN, ZH ;

LIANG, LY ;

MCCARTHY, JF .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1994, 28 (01) :38-46

[10] Microbial recolonization and chemical changes in a soil heated at different temperatures [J].

Guerrero, C ;

Mataix-Solera, J ;

Gómez, I ;

García-Orenes, F ;

Jordán, MM .

INTERNATIONAL JOURNAL OF WILDLAND FIRE, 2005, 14 (04) :385-400

← 1 2 3 4 →