Assessment of the contribution of municipal solid waste dumping coupled with open burning to the contamination of the surrounding environment by plasticizers

Open dumping sites have become a hotspot for combined environmental pollution. In developing countries,
including Tunisia, this practice is commonly coupled with municipal solid waste open burning as a costless
method compared to other methodologies. However, the resulting pollution may cause a significant hazard to the
surrounding environment and the nearby population’s health by spreading dangerous chemicals such as plasticizers.
In this context, the current study aimed at evaluating the levels of contamination across the dumpsite
coupled with open burnings in Mahdia city by plasticizers. Gas chromatography-single quadrupole mass spectrometry
analyses were conducted to identify and measure the concentration levels of 18 plasticizers in various
environmental matrices. The results of this study have shown the occurrence of several plasticizers (n =10) at a
wide range of concentrations, with di(2-ethylhexyl) phthalate, diisobutyl phthalate, and di(2-ethylhexyl) terephthalate
being the predominant compounds. Interestingly, the total concentration of plasticizers detected in
plant matrices was significantly higher than those found in the majority of the remaining matrices. Namely, the
detected concentrations of total plasticizers were in the following order: plant samples (3.777 mg Kg− 1 dw) >fly
ash (2.581 mg Kg− 1 dw) >soil-leachate (1.403 mg Kg− 1 dw) >soil (0.816 mg Kg− 1 dw) >sediment (0.505 mg
Kg− 1 dw) > water (0.009 mg L-1 dw).
Our findings confirm a large distribution of phthalates (PAE) and non-phthalates (NPP) across the open
dumping site in “Sabkha of Oued EL Maleh.” The detection of plasticizers in plant materials affirms their potential
to bioconcentrate through the food chain. Atmospheric transport and deposition of pollutants following
waste-burning practices could play a significant role in the contamination of the neighboring area, highlighting a
serious environmental and health impact of MSW mismanagement.