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Determination of heavy metals in dust from selected nursery and kindergarten classrooms within the Kumasi metropolis of Ghana

机译：测定加纳库玛西大都会内选定的幼儿园和幼儿园教室灰尘中的重金属

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The exposure potential of children in nursery and kindergarten schools to metals in dust in the Kumasi Metropolis was studied. Dust samples from 20 selected schools were analyzed for heavy metal levels using atomic absorption spectrophotometry. The results showed that concentrations were in the range of below detection ?9.710?μg/g for cobalt, below detection to 33.291?μg/g for chromium, below detection to 41.909?μg/g for lead, below detection to 1.383?μg/g for mercury, while cadmium levels were below detection for all samples. The mean levels of metals therefore decreased in the order: Cr??Pb??Co??Hg and Cd. Geographical variation correlated with heavy metal load. Health risk assessment using hazard quotient (HQ) and hazard index (HI) calculations indicated that ingestion contributed more to exposure than dermal contact. However, the values obtained by HQ and HI do not pose any immediate health risk but the cumulative effect is a matter of concern.
机译：研究了在库玛西大都会的托儿所和幼儿园的儿童暴露于灰尘中的金属的可能性。使用原子吸收分光光度法分析了来自20所选定学校的粉尘样品中的重金属含量。结果表明，钴的浓度在以下检测范围内：钴低于检测值9.710µg / g，铬低于检测值33.291µg / g，铅低于检测值41.909µg / g，低于检测值1.383µg / g g表示汞，而所有样品中的镉含量均低于检测值。因此，金属的平均含量按以下顺序降低：Cr 2＞ Pb 2＞ Co 2＞ Hg和Cd。地理变化与重金属负荷有关。使用危害商（HQ）和危害指数（HI）计算得出的健康风险评估表明，摄入比皮肤接触对暴露的影响更大。但是，HQ和HI所获得的值并不构成任何直接的健康风险，但是累积影响值得关注。

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