The Preliminary Study Of Heavy Metals And Typical Organic Pollutants On The Exposure Levels And Health Risks In Municipal Waste Incinerator Workers In Shenzhen

ObjectTo understand the exposure levels and pollution characteristics of the heavy metals and typical organic pollutants?Phthalate metabolites and bisphenolics?in the urine of municipal waste incinerator workers in Shenzhen.To evaluate the health risk of the workers posing by the two chemicals above.To provide basic data for the risk assessment of occupational exposure to heavy metals and typical organic pollutants in population regionally.ContentTotal of 119 waste incinerator workers were designated as exposed group in Shenzhen.According to the match at least 2 controls,241residents whose residences are 8 kilometers away from the waste incineration plant randomly selected as the control group,matched by age.Morning urine samples and questionnaires were collected from both the exposed group and the control group.The contents of ten heavy metals in urine were determined by ICP-MS,and the contents of eleven phthalate metabolites and five bisphenols in urine were determined by HPLC-MS/MS.The data were processed and analyzed by using t-test,non-parametric test,logistic regression analysis.To explore the exposure levels and influencing factors of heavy metals and typical organic pollutants to municipal waste incineration workers in Shenzhen.ResultsThe median concentrations of Mn,Fe,Cr,As,Se,and 8-OHdG in the urine of the waste incineration workers were higher than those in the control group.The differences observed in the concentrations of Mn,Fe,and Cr were statistically significant?P<0.001?.No significant correlation found between ten heavy metals in urine and 8-OHdG concentrations?P>0.05?.In all urine samples?exposed group and control group?,the detection rates of MEHP,MEOHP,MEHP,MBP,and MEP reached 99%.The detection rate of MMP in the exposed group was 99%,however,it was only 32.5%in the control group.BPA was commonly detected with a detection rate of 92.8%.The detection rates of the BPF,BPS,BPAF and BPZ were 66.9%,16.4%,14.7%and 8.3%,respectively.There was no significant difference observed in the median concentrations of BPA,BPF,BPS and BPAF between the exposed group and the control group.The HQ values of BBzP,DEP,and DMP were less than 1 by assessing the health risk.Among the 119 waste incineration workers,100 workers of them?84%?whose HQ_DEHP were more than value 1,HQ_DEHP values of23 was observed in individuality.The median concentrations of the five bisphenols measured in the exposed group and the control group differ in a little degree,and the HQs were all less than 1.ConclutionWaste incineration increases the exposure levels of waste incinerator workers to certain heavy metals,especially the Mn,Fe and Cr.The degree of oxidative damage to the DNA of incinerators is higher than that of ordinary residents.Heavy metals released from waste incineration are not important factors for inducing DNA oxidative damage.MEHP,MEOHP,MEHP,MBP,and MEP are commonly found in humans;waste incineration significantly increases workers'MMP exposure;Exposure risk assessment finds that workers in waste incineration plants suffering a very high exposure risk to DEHP,with potential health hazards;The waste incineration workers and residents around are less exposed to bisphenols.