Higher potential leaching of inorganic and organic additives from biodegradable compared to conventional agricultural plastic mulch film
文献类型： 外文期刊
作者： Reay, Michaela K. 1 ; Graf, Martine 2 ; Murphy, Madelyn 1 ; Li, Gupeng 2 ; Yan, Changrong 3 ; Bhattacharya, Mondira 4 ; Osbahr, Henny 4 ; Ma, Ji 5 ; Wen, Chengtao 5 ; Shi, Xiner 5 ; Ren, Siyang 2 ; Cui, Jixiao 3 ; Collins, Christopher 7 ; Chadwick, Dave 2 ; Jones, Davey L. 2 ; Evershed, Richard P. 1 ; Lloyd, Charlotte E. M. 1 ;
作者机构： 1.Univ Bristol, Sch Chem, Organ Geochem Unit, Bristol BS8 1TS, England
2.Bangor Univ, Sch Environm & Nat Sci, Bangor LL57 2UW, Gwynedd, Wales
3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China
4.Univ Reading, Sch Agr Policy & Dev, Dept Int Dev, Reading RG6, England
5.China Agr Univ, Coll Econ & Management, Qinghuadonglu 17, Beijing 10083, Peoples R China
6.China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Yuanmingyuan Xilu 2, Beijing 100193, Peoples R China
7.Univ Reading, Dept Geog & Environm Sci, Reading, England
8.Univ Bristol, Sch Geog, Bristol BS8 1SS, England
关键词： Low density polyethylene; Biodegradable; Organic additives; Heavy metals; Co-contaminants
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0304-3894
年卷期： 2025 年 488 卷
页码：
收录情况： SCI
摘要： Plastic mulch films support global food security, however, their composition and the potential release rates of organic, metal and metalloid co-contaminants remains relatively unknown. This study evaluates the low molecular weight organic additives, metal and metalloid content and leaching from low density polyethylene (LDPE) and biodegradable plastic mulch films. We identified 59 organic additives, and non-intentionally added substances in the new LDPE films (39.8 mg m- 2) and 60 in the new biodegradable films (129 mg m- 2). The leaching of organic compounds of high concern for ecosystem and human health (e.g. phthalates, organophosphite antioxidants) was comparable to those of low concern (fatty acids, fatty amides, alkanols). However, the majority of leached compounds have undergone no regulatory scrutiny and their environmental fate and toxicity remain unknown. Leaching of heavy metals (Cu, Zn, Pb) was low relative to inert fillers (Ca, Na). Leaching was higher for both organic and metal/metalloid additives from the biodegradable films (74.6 mg m- 2) than the LDPE films (23.7 mg m- 2). This untargeted approach allowed assessment of the chemical burden posed to individual farms, based on existing use patterns of plastic mulch films, with higher chemical burden coming from biodegradable films, raising the potential for pollution swapping. This research emphasises the need to include the complex mixture of leached additives when assessing the environmental risks presented by plastic mulch films, balancing yield benefits with the protection of our agricultural soils.
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