Leaching of the plasticizer di(2-ethylhexyl)phthalate (DEHP)
The breakdown pattern of DEHP is very important (Fig. 2) because stable metabolites are produced, such as 2-ethyl hexanol, 2-ethyl hexanoic acid, and its monoester, mono(2-ethylhexyl)phthalate (MEHP), each of which have been shown to be more toxic than DEHP itself (Horn et al. 2004; Nalli et al. 2006a; Nalli et al. 2006b; Nalli et al. 2006c).
Leaching of the plasticizer di(2-ethylhexyl)phthalate (DEHP)
Di(2-ethylhexyl)phthalate (DEHP) is a widely used plasticizer to render poly(vinyl chloride) (PVC) soft and malleable. Plasticized PVC is used in hospital equipment, food wrapping, and numerous other commercial and industrial products.
Leaching of the plasticizer di(2-ethylhexyl)phthalate (DEHP)
Phthalate plasticizers such as DEHP are synthesized from phthalic acid, in which the two carbonyl groups are in ortho-position to one another, i.e., on neighboring carbon atoms in the aromatic ring (Fig. 1). Phthalic acid is esterified with various alcohols, but most commonly with 2-ethyl hexanol, to form liquid DEHP (Fig. 1).
Leaching of the plasticizer di(2-ethylhexyl)phthalate (DEHP)
Abstract. Di (2-ethylhexyl)phthalate (DEHP) is a widely used plasticizer to render poly (vinyl chloride) (PVC) soft and malleable. Plasticized PVC is used in hospital equipment, food wrapping, and numerous other commercial and industrial products. Unfortunately, plasticizers can migrate within the material and leach out of it over time, ending
Aqueous leaching of di-2-ethylhexyl phthalate and “green” plasticizers
Di-2-ethylhexyl phthalate (DEHP) is responsible for over 50% of worldwide phthalate production, and remains the most widely used PVC plasticizer (Carlson, 2010, Wypych, 2004). A 2008 market survey predicted a 2% increase in PVC demand per year, with production exceeding 40 million tons globally by 2016 ( Ceresana, 2008 ).
- Does photoaging enhance the leaching rates of Di (2-ethylhexyl) phthalate (DEHP)?
- We show that photoaging strongly enhances the leaching rates of di (2-ethylhexyl) phthalate (DEHP) by a factor of 1.5, and newly-formed harmful transformation products, such as mono (2-ethylhexyl) phthalate (MEHP), phthalic acid, and phthalic anhydride from PVC microplastics into the aquatic environment.
- What is di(2-ethylhexyl)phthalate (DEHP)?
- Di(2-ethylhexyl)phthalate (DEHP) is a widely used plasticizer that is added to poly (vinyl chloride) (PVC) to make it soft and malleable. Plasticized PVC is used in various applications, including hospital equipment, food wrapping, and numerous other commercial and industrial products.
- Does environmental factors influence the leaching of di-2-ethylhexyl phthalate (DEHP) from PVC?
- The influence of environmental factors on the leaching of di (2-ethylhexyl) phthalate (DEHP) from PVC was assessed. Aqueous boundary layer diffusion is the governing diffusion process unaffected by environmental factors. Leaching of DEHP is slowed down at high salinity due to salting-out.
- Can PVC microplastics containing DEHP be used as model phthalate?
- In this study, we conducted batch leaching experiments using PVC microplastics containing DEHP as model phthalate and measured the leaching of DEHP (i) into three aqueous solutions with different salinities (1 mM KCl, freshwater, and artificial seawater) and (ii) under three different flow conditions (stagnant, moderate, and turbulent flow).
- How does photoaging affect the leaching rate of DEHP from PVC microplastics?
- Continuous leaching rates (slopes of the time-dependent leaching curves) increased with the degree of photoaging from 0.135 µg d −1 for pristine PVC microplastics to 0.179 µg d −1 and 0.209 µg d −1 for PVC 24d and PVC 48d, respectively. Fig. 1: Leaching of DEHP from pristine and photoaged PVC microplastics.
- Does photoaging improve the leaching rate of phthalate?
- Here, the authors show that photoaging enhances the leaching rate of the common additive di (2-ethylhexyl) phthalate (DEHP) by a factor of 1.5, and newly-formed harmful transformation products, such as mono (2-ethylhexyl) phthalate (MEHP), phthalic acid, and phthalic anhydride, are released from PVC microplastics into the aquatic environment.
