Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge
Coastal saline-alkali soil can be transformed to agricultural soil with sewage sludge amendment. However, sewage sludge contains a large number of microplastics (MPs), and the fate of MPs in sludge-treated saline-alkali soil needs to be studied. Therefore, we investigated the accumulation and migrat...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
|
| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651323011016 |
| _version_ | 1797643605760802816 |
|---|---|
| author | Siqiang Yi Wengang Zuo Lu Xu Yimin Wang Chuanhui Gu Yuhua Shan Yanchao Bai |
| author_facet | Siqiang Yi Wengang Zuo Lu Xu Yimin Wang Chuanhui Gu Yuhua Shan Yanchao Bai |
| author_sort | Siqiang Yi |
| collection | DOAJ |
| description | Coastal saline-alkali soil can be transformed to agricultural soil with sewage sludge amendment. However, sewage sludge contains a large number of microplastics (MPs), and the fate of MPs in sludge-treated saline-alkali soil needs to be studied. Therefore, we investigated the accumulation and migration of MPs, and their influencing factors in saline-alkali soil after one-time sewage sludge application (0, 25, 50, 100 and 200 t ha−1 SSA). The results indicated that sewage sludge input contributed to MP accumulation in soil, and the MP abundance in 20–40 cm soil was significantly lower than that in 0–20 cm soil. Fragments and fibers were the most abundant MPs in soil, and the proportions of fragments and 50–200 µm MPs in 20–40 cm soil were lower than those in 0–20 cm soil, while the < 50 µm MP proportion was higher than that in 0–20 cm soil. Correlation analysis showed that MP accumulation rate (0–40 cm) and migration rate (20–40 cm) were negatively correlated with soil organic matter (SOM) content and SSA, but positively correlated with soil pH. Stepwise regression analysis further showed that SOM and SSA were the main factors affecting MP accumulation rate, which explained 47.7% and 46% of its variation, respectively, while pH was the crucial factor affecting the migration rate of MPs, followed by EC and SSA. In conclusion, SSA caused MP accumulation in saline-alkali soil, and SSA primarily affected the MP abundance, while soil OM, pH and EC directly affected MP migration in soil. |
| first_indexed | 2024-03-11T14:17:19Z |
| format | Article |
| id | doaj.art-7acf5a57e9af43e0895688ce383c7359 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-03-11T14:17:19Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-7acf5a57e9af43e0895688ce383c73592023-11-01T04:46:03ZengElsevierEcotoxicology and Environmental Safety0147-65132023-11-01266115597Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludgeSiqiang Yi0Wengang Zuo1Lu Xu2Yimin Wang3Chuanhui Gu4Yuhua Shan5Yanchao Bai6College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR ChinaEnvironmental Research Center, Duke Kunshan University, Kunshan 215316, PR ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR China; Key Laboratory of Arable Land Quality Monitoring and Evaluation, Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225127, PR China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, PR ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, PR China; Key Laboratory of Arable Land Quality Monitoring and Evaluation, Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Coastal Saline-Alkali Lands), Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225127, PR China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, PR China; Correspondence to: College of Environmental Science and Engineering, Yangzhou University, PR China.Coastal saline-alkali soil can be transformed to agricultural soil with sewage sludge amendment. However, sewage sludge contains a large number of microplastics (MPs), and the fate of MPs in sludge-treated saline-alkali soil needs to be studied. Therefore, we investigated the accumulation and migration of MPs, and their influencing factors in saline-alkali soil after one-time sewage sludge application (0, 25, 50, 100 and 200 t ha−1 SSA). The results indicated that sewage sludge input contributed to MP accumulation in soil, and the MP abundance in 20–40 cm soil was significantly lower than that in 0–20 cm soil. Fragments and fibers were the most abundant MPs in soil, and the proportions of fragments and 50–200 µm MPs in 20–40 cm soil were lower than those in 0–20 cm soil, while the < 50 µm MP proportion was higher than that in 0–20 cm soil. Correlation analysis showed that MP accumulation rate (0–40 cm) and migration rate (20–40 cm) were negatively correlated with soil organic matter (SOM) content and SSA, but positively correlated with soil pH. Stepwise regression analysis further showed that SOM and SSA were the main factors affecting MP accumulation rate, which explained 47.7% and 46% of its variation, respectively, while pH was the crucial factor affecting the migration rate of MPs, followed by EC and SSA. In conclusion, SSA caused MP accumulation in saline-alkali soil, and SSA primarily affected the MP abundance, while soil OM, pH and EC directly affected MP migration in soil.http://www.sciencedirect.com/science/article/pii/S0147651323011016Microplastic pollutionSalt soilOrganic fertilizerSoil properties |
| spellingShingle | Siqiang Yi Wengang Zuo Lu Xu Yimin Wang Chuanhui Gu Yuhua Shan Yanchao Bai Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge Ecotoxicology and Environmental Safety Microplastic pollution Salt soil Organic fertilizer Soil properties |
| title | Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge |
| title_full | Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge |
| title_fullStr | Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge |
| title_full_unstemmed | Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge |
| title_short | Accumulation and migration of microplastics and its influencing factors in coastal saline-alkali soils amended with sewage sludge |
| title_sort | accumulation and migration of microplastics and its influencing factors in coastal saline alkali soils amended with sewage sludge |
| topic | Microplastic pollution Salt soil Organic fertilizer Soil properties |
| url | http://www.sciencedirect.com/science/article/pii/S0147651323011016 |
| work_keys_str_mv | AT siqiangyi accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT wengangzuo accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT luxu accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT yiminwang accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT chuanhuigu accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT yuhuashan accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge AT yanchaobai accumulationandmigrationofmicroplasticsanditsinfluencingfactorsincoastalsalinealkalisoilsamendedwithsewagesludge |