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| Adsorption of 2, 4-Dichlorophenoxyacetic acid in aqueous solution by biochars derived fromthree feedstocks |
| Received:September 30, 2015 |
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| KeyWord:acid elution;feedstock;biochar;2, 4-dichlorophenoxyacetic acid;adsorption |
| Author Name | Affiliation | E-mail | | WANG Yue-ying | College of Resource and Environment, China Agricultural University, Beijing 100193, China | | | LI Li-jun | College of Resource and Environment, China Agricultural University, Beijing 100193, China | | | LÜ Yi-zhong | College of Resource and Environment, China Agricultural University, Beijing 100193, China | lyz@cau.edu.cn |
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| Abstract: |
| In this study, we investigated the adsorption kinetics and isotherms of a model solute(2, 4-dichlorophenoxyacetic, or 2, 4-D) by biochars prepared from three feedstocks(corn stover, poplar leaves and sewage sludge) at 400℃. At the same pyrolysis temperature, sewage sludge biochar had significant low C content in comparison with those derived from plant materials, but their O/C, H/C and(H+O)/C radio had similar trends. The properties of feedstocks greatly influenced the adsorption characteristics of biochars. The mechanisms of 2, 4-D adsorption by sewage sludge biochar were obviously different from those of the other two biochars. The selection of adsorbents must be caseby-case based on the characteristics of biochar feedstocks. This study provides us a potential way to use relatively more suitable biochar in reducing the leaching of organochlorine pesticides. |
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