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首页> 外文期刊>International Journal of Soil, Sediment and Water >Effects of Soil and Aging on the Dermal Bioavailability of Hydrocarbons and Metals in Soil
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Effects of Soil and Aging on the Dermal Bioavailability of Hydrocarbons and Metals in Soil

机译：土壤和衰老对土壤中碳氢化合物和金属的生物利用度的影响

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The potential health risk from exposure to chemically contaminated soil can be assessed from bioavailability studies. The aims of this research were: (a) to determine the dermal bioavailability of contaminants in soil for representatives of hydrocarbon classes of chemicals, namely, volatiles (toluene) and polycyclic aromatic hydrocarbons [benzo(a)pyrene] as well as for heavy metals (arsenic, mercury, and nickel, respectively, as arsenic acid, mercuric chloride, and nickel chloride); and (b)to examine the effects of soil matrix and chemical sequestration in soil with time (“aging”) on their bioavailability. In vitro flow-through diffusion cell studies were performed utilizing dermatomed male pig skin and radioactive chemicals to measure dermal penetration. The volatility of toluene reduced the amount of the chemical available for dermal penetration. With soil contact, the penetration of toluene was 16-fold to 21-fold less than toluene without soil. Benzo(a)pyrene penetration was decreased faster in soil with a higher clay content than one with more organic carbon. The soil matrix as well as aging in soil lowered the dermal penetration of the metal compounds by 95-98%. This study provided evidence that the bioavailability from dermal exposure to the chemicals examined can be significantly reduced by soil matrix and aging in soil.
机译：可以从生物利用度研究中评估因接触化学污染土壤而引起的潜在健康风险。这项研究的目的是：（a）确定污染物在皮肤中的生物利用度，以代表烃类化学物质的代表，即挥发性物质（甲苯）和多环芳烃[苯并（a）py]以及重金属（砷，汞，氯化镍和氯化镍分别为砷，汞和镍）; （b）研究土壤基质和化学固存随着时间的推移（“老化”）对其生物利用度的影响。体外穿流扩散细胞研究是使用经过皮切开的雄性猪皮肤和放射性化学物质测量皮肤穿透力而进行的。甲苯的挥发性降低了可用于皮肤渗透的化学物质的量。接触土壤后，甲苯的渗透率比不接触土壤的甲苯低16倍至21倍。在粘土含量较高的土壤中，苯并（a）re的渗透速度要比有机碳含量较高的土壤快。土壤基质以及土壤的老化使金属化合物的皮肤渗透率降低了95-98％。这项研究提供的证据表明，土壤基质和土壤老化会显着降低皮肤接触被测化学品的生物利用度。

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