Reduced mobility of fomesafen through enhanced adsorption in biochar-amended soil

The residual soil material resulting from biomass thermochemical transformation during carbon separation, known as biochar, has been introduced as a soil amendment because of its numerous environmental benefits, including uses for contaminated land management. Adsorption and leaching of fomesafen in...

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Bibliographic Details
Published in:Environmental toxicology and chemistry 2015-06, Vol.34 (6), p.1258-1266
Main Authors: Khorram, Mahdi Safaei, Wang, Yun, Jin, Xiangxiang, Fang, Hua, Yu, Yunlong
Format: Article
Language:English
Subjects:
Adsorption
Agricultural land
Agriculture
Benzamides - chemistry
Biomass
Carbon - chemistry
Charcoal
Charcoal - chemistry
Desorption
Fomesafen
Herbicides
Herbicides - chemistry
Land management
Land pollution
Leachates
Leaching
Residual soils
Rice hull biochar
Rice hulls
Soil - chemistry
Soil amendment
Soil columns
Soils
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Summary:The residual soil material resulting from biomass thermochemical transformation during carbon separation, known as biochar, has been introduced as a soil amendment because of its numerous environmental benefits, including uses for contaminated land management. Adsorption and leaching of fomesafen in soils amended with 3 different rates of rice hull biochar (0.5%, 1%, and 2% w/w) under laboratory conditions were investigated, and studies were performed following a batch equilibration adsorption–desorption procedure and a column experiment for leaching. Adsorption–desorption data fit with the Freundlich equation well. The adsorption coefficient of fomesafen sharply increased from 0.59 to 0.99 to 8.02 to 22.23 when the amount of biochar amendment in the soil increased from 0% to 2% (w/w). In addition, a strong correlation was found between the amount of adsorbed fomesafen and the rate of amended biochar (r > 0.992, p 
ISSN:0730-7268
1552-8618
DOI:10.1002/etc.2946