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Occurrence, spatiotemporal trends, fate, and treatment technologies for microplastics and organic contaminants in biosolids: A review. | LitMetric

AI Article Synopsis

  • - This review analyzes the prevalence and impact of microplastics (MPs) and various organic contaminants (OCs) in biosolids, highlighting that MPs and linear alkylbenzene sulfonate surfactants are the most common pollutants found.
  • - It notes that while dioxins and polychlorinated biphenyls are minimally present (<0.01%), OCs are more prevalent in Europe compared to Asia and the Americas, and that Australian biosolids have significantly higher MP concentrations than those in the US and Europe.
  • - The study concludes that anaerobic digestion is the most effective method for treating these contaminants in biosolids, while thermal treatment shows promise but needs further development in terms of infrastructure and

Article Abstract

This review provides a comprehensive overview of the occurrence, fate, treatment and multi-criteria analysis of microplastics (MPs) and organic contaminants (OCs) in biosolids. A meta-analysis was complementarily analysed through the literature to map out the occurrence and fate of MPs and 10 different groups of OCs. The data demonstrate that MPs (54.7% occurrence rate) and linear alkylbenzene sulfonate surfactants (44.2% occurrence rate) account for the highest prevalence of contaminants in biosolids. In turn, dioxin, polychlorinated biphenyls (PCBs) and phosphorus flame retardants (PFRs) have the lowest rates (<0.01%). The occurrence of several OCs (e.g., dioxin, per- and polyfluoroalkyl substances, polycyclic aromatic hydrocarbons, pharmaceutical and personal care products, ultraviolet filters, phosphate flame retardants) in Europe appear at higher rates than in Asia and the Americas. However, MP concentrations in biosolids from Australia are reported to be 10 times higher than in America and Europe, which required more measurement data for in-depth analysis. Amongst the OC groups, brominated flame retardants exhibited exceptional sorption to biosolids with partitioning coefficients (log K) higher than 4. To remove these contaminants from biosolids, a wide range of technologies have been developed. Our multicriteria analysis shows that anaerobic digestion is the most mature and practical. Thermal treatment is a viable option; however, it still requires additional improvements in infrastructure, legislation, and public acceptance.

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Source
http://dx.doi.org/10.1016/j.jhazmat.2024.133471DOI Listing

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