標題: Influence of organic matter and solute concentration on nitrate sorption in batch and diffusion-cell experiments
作者: Remya, Neelancherry
Kumar, Mathava
Mohan, S.
Azzam, Rafig
環境工程研究所
Institute of Environmental Engineering
關鍵字: Nitrate;Adsorption;Diffusion-cell test;Organic matter;Leaching
公開日期: 1-May-2011
摘要: Nitrate sorption potentials of three surface soils (soils-1-3) were evaluated under different solute concentrations. i.e. 1-100 mg L(-1). Batch and diffusion-cell adsorption experiments were conducted to delineate the diffusion property and maximum specific nitrate adsorption capacity (MSNAC) of the soils. Ho's pseudo-second order model well fitted the batch adsorption kinetics data (R(2) > 0.99). Subsequently, the MSNAC was estimated using Langmuir and Freundlich isotherms; however, the best-fit was obtained with Langmuir isotherm. Interestingly, the batch adsorption experiments over-estimated the MSNAC of the soils compared with the diffusion-cell tests. On the other hand, a proportionate increase in the MSNAC was observed with the increase in soil organic matter content (OM) under the batch and diffusion-cell tests. Therefore, increasing the soil OM by the application of natural compost could stop nitrate leaching from agricultural fields and also increase the fertility of soil. (C) 2010 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.biortech.2010.12.044
http://hdl.handle.net/11536/8955
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2010.12.044
期刊: BIORESOURCE TECHNOLOGY
Volume: 102
Issue: 9
起始頁: 5283
結束頁: 5289
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