Influence of organic matter and solute concentration on nitrate sorption in batch and diffusion-cell experiments

被引：8

作者：

Remya, Neelancherry ^{[2
]}

Kumar, Mathava ^{[1
]}

Mohan, S. ^{[2
]}

Azzam, Rafig ^{[3
]}

机构：

[1] Natl Chiao Tung Univ, Inst Environm Engn, Hsinchu 30010, Taiwan

[2] Indian Inst Technol, Environm & Water Resources Engn Div, Dept Civil Engn, Madras 600036, Tamil Nadu, India

[3] Rhein Westfal TH Aachen, Aachen, Germany

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 09期

关键词：

Nitrate; Adsorption; Diffusion-cell test; Organic matter; Leaching; DESORPTION CHARACTERISTICS; INDIAN SOILS; ADSORPTION; SURFACTANT; NITROGEN; REMOVAL; MEXICO; WATER;

D O I：

10.1016/j.biortech.2010.12.044

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

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.

引用

页码：5283 / 5289

页数：7