Bioaccessibility and Health Risk of Heavy Metals in a Chromium Salt Plant
Taking chromium(Cr),nickel(Ni),copper(Cu),and lead(Pb)in the contaminated soil of a chrome salt factory as the target,the deutsches institut für normung(DIN-19738),the effects of different feeding conditions on the bioavailability of heavy metals were studied.Based on the bioavailability of Cr,human health risks under the oral intake exposure pathway were calculated.The results showed that only Cr was detected in the soil of the site,and the concentration ranged from 9.06×103 to 8.07×104 mg/kg;the bioavailability in the enteric phase was lower than that in the gastric phase for Pb,Ni and Cr,and higher than that in the gastric phase for Cu;the bioavailability in fasting was higher than that in feeding for Cr and Ni,and vice versa for Pb and Cu;and the bioavailability based on the bioavailability of Cr was higher than that of Cr and Ni in fasting,and vice versa for Cu.The opposite was true for Pb and Cu;Cr exposures and human health risks in soil based on bioavailability were reduced to varying degrees.
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