Evaluation of the influence of temperature and relative humidity on the permeability of four films to the fumigant dimethyl disulfide

文献类型： 外文期刊

第一作者： Fang, Wensheng

作者： Fang, Wensheng;Yan, Dongdong;Han, Dawei;Liu, Jie;Ren, Zongjie;Ouyang, Canbin;Li, Yuan;Wang, Qiuxia;Cao, Aocheng

作者机构：

关键词： Fumigation; Dimethyl disulfide; Permeability; Films; Polyvinyl chloride; Polyvinylidene chloride

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN： 0301-4797

年卷期： 2019 年 236 卷

页码：

收录情况： SCI

摘要： Dimethyl disulfide (DMDS) is an alternative fumigant to methyl bromide that was phased out globally due to its stratospheric ozone-depleting properties. Covering the surface of the soil with a plastic tarpaulin or 'barrier film' when using a soil fumigant is typically used to retain fumigants in the soil and to reduce emissions. Emission levels depend on the film's permeability, which varies mainly according to the film's material, the type of fumigant and the environmental conditions. We used specialized laboratory equipment to test the permeability of four films to DMDS under similar temperature and relative humidity (RH) conditions present in the field: polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) and ethylene vinyl alcohol copolymer (EVOH). This report presents evidence that the influence of temperature and relative humidity on the permeability of four films to the fumigant DMDS: PE, PVC, PVDC, EVOH. This research confirmed that PE and PVC films are relatively permeable to DMDS and PVC was more unstable to a range of environmental condition than other three films; PVDC and EVOH films are relatively impermeable to the fumigant DMDS and the permeability of PVDC was more stable to a range of environmental conditions than EVOH. The cumulative emissions of DMDS from soil covered with PE, PVC, PVDC or EVOH were 21.38%, 27.51%, 1.59% and 1.52%, respectively. As the permeability of PVDC was more stable to a range of environmental conditions than EVOH, PVDC shows potential for use in the field with a volatile fumigant such as DMDS.

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