LIÊN KẾT WEBSITE
Coaggregation of micro polystyrene particles and suspended minerals under concentrated salt solution: A perspective of terrestrial-to-ocean transfer of microplastics
Marine Pollution Bulletin Số , năm 2022 (Tập 185, trang -)
ISSN: 0025326X
ISSN: 0025326X
DOI: 10.1016/j.marpolbul.2022.114317
Tài liệu thuộc danh mục:
Article
English
Từ khóa: Clay; Microplastics; Minerals; Plastics; Polystyrenes; Sodium Chloride; Sodium Chloride, Dietary; Soil; Bentonite; Efficiency; Hematite; Kaolinite; Microplastic; Polystyrenes; Suspended sediments; Van der Waals forces; mineral; plastic; polystyrene derivative; sodium chloride; Coaggregation; Colloidal Stability; Illitic soils; Kaolinitic soils; Microplastics; Mineral colloids; Polystyrene particle; Salt solution; Soil clay; Transport; clay; salt intake; soil; Agglomeration
Tóm tắt tiếng anh
This study evaluates the colloidal stability of polystyrene microplastics (PSMPs) in the presence of various mineral colloids. Although PSMPs were highly dispersive, they were found to be involved in the aggregation of each mineral colloid. The efficiency of mineral colloids to stimulate the coaggregation of PSMPs follows the order bentonite > kaolinitic soil clay > illitic soil clay > kaolinite > goethite > haematite. Surface charge density is likely a crucial factor that determines the efficiency of mineral colloids. In concentrated salt solution, PSMPs together with mineral colloids can be involved in various continuous and simultaneous electrochemical processes such as charge neutralization, double electric layer compression, van der Waals attraction stimulation and heteroaggregation. These processes may also occur in the estuary environments, where suspended mineral colloids may play an ultimate role in reducing the transport of microplastics into oceans while also intensifying microplastic enrichment in coastal sediments. 2022 Elsevier Ltd