Oloruntoba Elizabeth, Gurusa Olusegun, Omokhodion Folashade, Fobil Julius, Basu Niladri, Arko-Mensah John, Robin Thomas
Department of Environmental Health Sciences, University of Ibadan, Ibadan, Nigeria.
Department of Community Medicine, University of Ibadan, Ibadan, Nigeria.
J Health Pollut. 2021 Mar 2;11(29):210304. doi: 10.5696/2156-9614-11.29.210304. eCollection 2021 Mar.
Heavy metals are usually present in trace amounts in various environmental media such as water, soil, and air, and many are poisonous to human health even at very low concentrations.
To assess the risk of heavy metal contamination of water, soil, and plants around a used lead acid battery (ULAB) recycling center in Ibadan, Nigeria.
Environmental samples (water, soil, and plants) were collected using standard methods and concentrations of arsenic (As), cadmium (Cd), antimony (Sb), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), selenium (Se), and zinc (Zn) were determined using inductively coupled plasma-optical emission spectrometry at the International Institute of Tropical Agriculture, Ibadan, Nigeria.
The concentration of metals detected in water samples were higher than permissible limits at more than 50% of the sampling locations. In contrast, heavy metals in soil were within permissible limits. Most of the heavy metals except Pb were found to be present in the plant within permissible limits. Lead levels in water and plants from all locations exceeded the permissible limits. The contamination degree and pollution load index of water sources around the ULAB recycling center indicate a high degree of pollution of water sources with heavy metals, while soil samples were within the normal baseline levels. The transfer factor of Pb from soil to was 1.92. This has implications for human health as the plant is often harvested and for sale in local markets as a source of food and medicine.
The present study recommends improved technology for ULAB recycling and adequate treatment of effluent/runoff from recycling centers before discharge.
The authors declare no competing financial interests.
重金属通常以痕量存在于水、土壤和空气等各种环境介质中，许多重金属即使在极低浓度下也对人体健康有毒害作用。
评估尼日利亚伊巴丹一个废旧铅酸电池回收中心周边水、土壤和植物的重金属污染风险。
采用标准方法采集环境样品（水、土壤和植物），并在尼日利亚伊巴丹的国际热带农业研究所使用电感耦合等离子体发射光谱法测定砷（As）、镉（Cd）、锑（Sb）、铬（Cr）、铜（Cu）、锰（Mn）、镍（Ni）、铅（Pb）、硒（Se）和锌（Zn）的浓度。
在超过50%的采样地点，水样中检测到的金属浓度高于允许限值。相比之下，土壤中的重金属含量在允许限值内。除铅外，大多数重金属在植物中的含量在允许限值内。所有地点的水和植物中的铅含量均超过允许限值。废旧铅酸电池回收中心周边水源的污染程度和污染负荷指数表明水源受到重金属的高度污染，而土壤样品处于正常基线水平。铅从土壤到植物的转移因子为1.92。这对人类健康有影响，因为这种植物经常被收割并在当地市场作为食物和药材出售。
本研究建议改进废旧铅酸电池回收技术，并在回收中心排放废水/径流前进行充分处理。
作者声明不存在相互竞争的财务利益。
