機(jī)物料中溶解性有機(jī)質(zhì)對土壤吸附除草劑的抑制作用-資料下載頁
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【正文】 ethyl in Soils[J]. Environmental Science, 2003, 24(3): 122125.[16] VON OEPEN B, K214。RDEL W, KLEIN W. Sorption of nonpolar and polar pounds to soils: process, measurements and experience with the applicability of the modified OECDguideline 106[J]. Chemosphere, 1991, 22: 285304.The inhibit effects of dissolved organic matter extracted from organic materials on herbicide sorption in soilTang Dongmin1, 2, Wu Jun1*, Chen Hualin2, Zhou Jiangmin2, Zhu Liang1,21. Resource and Environmental College of Sichuan Agricultural University, Ya’an Sichuan 625014, China；2. Life and Environmental Science College of Wenzhou University, Wenzhou Zhejiang 325027, ChinaAbstract: Dissolved organic matter (DOM) is a very important ponent in terrestrial and aquatic ecosystems. It can affect the toxicity, transformation, fate and biodegradability of organic pollutants, and application of organic fertilizer can release a large mount of DOM. The effect of dissolved organic matter (DOM) derived from various stages of crop straw deposition on the sorption behavior of Bensulfuronmethyl (BSM) in soil had been studied. The results showed that (i) linear model can pletely explained the mechanism of the BSM sorption。 (ii) Within the selected concentration range of the BSM and DOM in this study, the sorption capacity of soil BSM reduced significantly after applying DOM into soil, which derived from different deposing stages. Furthermore, there is significant difference (p) paring to control treatment (., no DOM in sorption course). The effect of DOM on the sorption capacity of soil BSM was weakened with longer DOM deposition time。 (iii)the role of hydrophilic fraction and hydrophobic fraction of DOM on the inhibit effects were different。 (iv) the adsorbed free energy of BSM in soil were all less than 40 kJmol1,could infer that it belonged to the physical adsorption, its sorption mechanism could be the action of Hbonds, hydrophobic bonding, dipolar action force and van de Walls force, while the chemical bond sorption action was not existed.Key words: dissolved organic matter (DOM)。 bensulfuronmethyl (BSM)。 soil。 sorption。 hydrophilic fraction。 hydrophobic fraction
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