Linear and Nonlinear Isotherm Models and Error Analysis for the Sorption of Kresoxim‑Methyl in Agricultural Soils of India

Khandelwal, Ashish and Narayanan, Neethu and Varghese, Eldho and Gupta, Suman (2020) Linear and Nonlinear Isotherm Models and Error Analysis for the Sorption of Kresoxim‑Methyl in Agricultural Soils of India. Bulletin of Environmental Contamination and Toxicology, 104. pp. 503-510.

Text Bulletin of Environmental Contamination and Toxicology_2020_Eldho Varghese.pdf Restricted to Registered users only Download (617kB) | Request a copy

Abstract

Kresoxim methyl sorption in soils of five agro-climatic zones of India varied from 41.6% to 84.7%. Highest sorption was recorded in organic carbon rich Almora soil. Isotherm parameters for linear and non-linear Freundlich and Temkin models were almost same, whereas Langmuir parameter Q0, for linear (1.60 to 9.434 μg g−1) and non-linear (8.48 to 17.129 μg g−1) models were quite different. For isotherms optimization different error functions such as sum of squares error (SSE), root mean square error (RMSE), Chi square error, hybrid fractional error (HYBRID) and average relative error (ARE) were calculated. Lowest error function values were obtained for Freundlich isotherm in all the soils except inceptisol (Kolkata) for which Langmuir isotherm gave the best fit. Statistical analysis using SAS 9.3 software and Tukey’s HSD test revealed the significant effect (p < 0.001) of soil type on sorption. Sorption correlated positively with the organic carbon and clay contents of the soil.

Actions (login required)

View Item