Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, Rawalpindi, 46000, Pakistan.
Environ Monit Assess. 2018 Nov 20;190(12):737. doi: 10.1007/s10661-018-7119-z.
The dearth of adsorption studies on aminothiazole carboxamide-based fungicide Ethaboxam has eventuated to its current investigation of sorption behavior on soil samples utilizing standard batch equilibrium method. Ethaboxam-based sorption studies have never been reported in the selected regions. Linear adsorption coefficient (K) ranged from 3.2 to 16.74 μg mL. The highest value of K was observed for soil rich in organic matter. Low Gibbs free energy values indicated the weak interaction between soil particles and Ethaboxam resulting in physiosorption and an exothermic reaction. Statistical analysis expressed a negative correlation between soil pH and K (R = - 0.85 and p < 0.05) and positive correlation with organic matter (R = 0.94). The data was further analyzed by univariate ANOVA, and accuracy was checked by residual plots for investigating the statistical significance of the results. Cost effective Ethaboxam remediation from soils was performed by Juglans regia (walnut) shells-derived activated carbon on different pesticide concentrations (5 ppm and 7.5 ppm) in soils. Consummate removal percentages were obtained in 5 ppm (99%) and 7.5 ppm concentrations (89%). The use of Juglans regia shells for the removal of Ethaboxam makes this method environmental friendly, economical, and easily applicable.
由于缺乏氨基噻唑甲酰胺类杀菌剂乙霉威在吸附研究方面的资料，目前利用标准批量平衡法对土壤样品的吸附行为进行了研究。在所选地区从未报道过乙霉威的吸附研究。线性吸附系数 (K) 范围为 3.2 至 16.74μg/mL。在富含有机质的土壤中观察到 K 的最高值。低吉布斯自由能值表明土壤颗粒与乙霉威之间的相互作用较弱，导致物理吸附和放热反应。统计分析表明，土壤 pH 值与 K 呈负相关 (R = -0.85，p < 0.05)，与有机质呈正相关 (R = 0.94)。通过单因素方差分析进一步分析了数据，并通过残差图检查了结果的统计学意义。在不同农药浓度（5ppm 和 7.5ppm）下，用从核桃壳中提取的活性炭对土壤中的乙霉威进行了具有成本效益的修复。在 5ppm（99%）和 7.5ppm（89%）浓度下，获得了完全去除率。使用核桃壳去除乙霉威使这种方法具有环保、经济和易于应用的特点。
