Plasticizers and their degradation products in the process
The plasticizers bis (2-ethylhexyl) phthalate (BEHP), bis (2-ethylhexyl) terephthalate (BEHTP) and bis (2-ethylhexyl) adipate (BEHA) were found in significant quantities in the influents, process streams, treated effluent and solid residues of a large physicochemical treatment plant in Montreal, Can
Plasticizers and their degradation products in the process
Given that plasticizers and their degradation products may pose a threat to ecosystems after they are released into receiving waters, a study of the fate of these compounds is warranted. In particular, it is essential to evaluate their prevalence in various treatment plant compartments and to identify processes that are most effective in
Plasticizers and their degradation products in the process
There are four potential modes of removal of organic compounds such as plasticizers during conventional wastewater treatment (Langford and Lester, 2003): (1) adsorption on suspended solids or into fats and oils; (2) aerobic and anaerobic biodegradation; (3) chemical degradation (e.g., surface-catalyzed hydrolysis, photo-oxidation); and (4)
Plasticiser loss from plastic or rubber products through
Polymers experience degradation during storage and service. One of the main degradation mechanisms of plasticised-polymer products is the loss of plasticiser, which leads to poorer mechanical
Plasticizers and their degradation products in the process
studies, it is still not evident how readily the degradation products of plasticizers will form and/or persist in process streams as they pass through sewage treatment systems. There are four potential modes of removal of organic compounds such as plasticizers during conventional waste-water treatment ( Langford and Lester, 2003): (1) adsorption on
- What research should be done about plasticizer degradation?
- Future research should focus on further elucidating the mechanisms of plasticizer degradation, investigating the metabolic pathways or enzymes involved in degradation by the identified bacterial genera, and conducting life cycle assessments of products containing plasticizers to better understand their overall environmental impacts.
- Do biotic processes play a role in plasticizer degradation?
- Although a significantly higher degradation was found in plasticizer-added microcosms under biotic processes (overall, 94%), there was a noticeable abiotic loss (72%), suggesting that abiotic processes also play a role in plasticizer degradation.
- Do polyvinyl chloride microplastics release phthalate and non-phthalate plasticizers into sediment?
- This study investigated the leaching of phthalate and non-phthalate plasticizers from polyvinyl chloride microplastics (MPs) into sediment and their degradation over a 30-d period via abiotic and biotic processes. The results showed that 3579% of plasticizers were released into the sediment from the MPs and > 99.9% degradation was achieved.
- Can phthalate plasticizers be degraded by biotic methods?
- Several studies have reported that phthalate plasticizers are readily degraded by biotic methods , , ; however, their abiotic degradation efficiencies have not been well studied. This study found that the potential for abiotic degradation of plasticizers was also high, which may be due to hydrolysis .
- Why are plasticizer degradation rates higher in PVC?
- It also shows that the rate of plasticizer degradation (DEHT and DINP) in the PVC batches is higher than that in the plasticizer batch, which is possibly due to biofilm formation on the surface of PVC MPs with the help of EPS, thereby enhancing degradation rates.
- What causes Abiotic degradation of plasticizers?
- This study found that the potential for abiotic degradation of plasticizers was also high, which may be due to hydrolysis . Further studies are required to investigate the potential causes of the abiotic degradation of plasticizers.
