| Autor: |
Sultan, Marriya1, Waheed, Sidra1, Ali, Usman1, Sweetman, Andrew James2, Jones, Kevin C.2, Malik, Riffat Naseem1 r_n_malik@qau.edu.pk |
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| Zdroj: |
Ecotoxicology & Environmental Safety. Apr2019, Vol. 170, p195-204. 10p. |
| Abstrakt: |
Abstract Waste dumping sites are considered as significant disposal pathway for waste contaminants including pesticides. In the present study OCPs were analyzed in soils of waste dumping sites of Pakistan. The mean concentrations of OCPs were in the order: ∑ DDTs> ∑ HCHs> ∑ Endosulfan> ∑ HCB>Heptachlor. Order of overall ∑OCPs contamination with respect to location was Lahore>Sukkur>Karachi>Kamoki>Faisalabad>Hyderabad>Losar>Gujrat>Peshawar. Distribution of OCPs in solid waste dumping site was mainly influenced by textural classes, input history and pollution source. Soil texture was the dominant factor for retention of OCPs, whereas TOC and black carbon has not significantly impacted the concentrations of OCPs. Diagnostic ratios indicated the historical input, anaerobic degradation pathway and use of technical mixtures of DDTs in majority of waste dumping sites whereas for HCHs recent as well as past usage of technical mixture was prevalent in most of the areas. Regression analysis revealed a weak positive correlation of OCPs with socioeconomic indices (HDI, Population, waste generation) which is linked with history of use of these contaminants in the respective areas. Forecasted waste generation quantity for the year 2026 showed that waste generation amount will get doubled by the year 2026 suggesting the need properly designed waste management system. Graphical abstract fx1 Highlights • Historic and recent dumping of organic chemicals has resulted in widespread contamination of soils. • Distribution of OCPs in solid waste dumping site is mainly influenced by textural classes, input history and pollution source. • High δ 13C values in soils and respective low TOC indicates inorganic source of Carbon with more inorganic waste components in dumping sites. • Forecasted waste generation for the year 2026 indicates that the solid waste amount will get doubled by the year 2026. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
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