Microplastics aged in various environmental media exhibited strong sorption to heavy metals in seawater

被引：134

作者：

Gao, Liu ^{[1
,2
]}

Fu, Dongdong ^{[1
,2
]}

Zhao, Jinjin ^{[1
]}

Wu, Wanshan ^{[1
]}

Wang, Zezheng ^{[1
,2
]}

Su, Yuanyuan ^{[1
,2
]}

Peng, Licheng ^{[1
,2
]}

机构：

[1] Hainan Univ, Coll Ecol & Environm, Haikou 570228, Hainan, Peoples R China

[2] Key Lab Agro Forestry Environm Proc & Ecol Regula, Haikou, Hainan, Peoples R China

来源：

MARINE POLLUTION BULLETIN | 2021年 / 169卷

基金：

中国国家自然科学基金;

关键词：

Microplastic; UVA irradiation; Aging; Adsorption; Heavy metal; ADSORPTION BEHAVIOR; DEGRADATION; PELLETS; PARTICLES; BIOCHAR; FIBER; WATER;

D O I：

10.1016/j.marpolbul.2021.112480

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To date, the degradation of microplastics (MPs; 5 mm) in different environments, particularly their adsorption characteristics for coexisted metal pollutants remains to be elucidated. Thus, this study investigated the effects of aging MPs, including polyamide (mPA), polyethylene terephthalate (mPET), polystyrene (mPS), and polyvinyl chloride (mPVC) for 3 months under UVA irradiation in four environmental media (air, seawater, sand, and soil) and adsorption of heavy metals (Cu, Cd) onto seawater-aged mPS and mPVC. The results showed that surface morphological changes, including cracks, oxidized particles, and wrinkles, appeared on aged MPs. The heavy metal adsorption capacity decreased in the order aged mPVC aged mPS > unaged mPS > unaged mPVC, and the Cu2+ and Cd2+ ions competed for active adsorption sites on the MPs surfaces. Overall, the aging environment affected the physical and chemical properties of MPs and the aging of MPs enhanced their adsorption of coexisting metals tested.

引用

页数：11

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