刚果民主共和国金沙萨城市周边地区种植的阿玛兰灌溉水、土壤中的重金属浓度和饮食风险评估

Georgette N. Ngweme , Emmanuel K. Atibu , Dhafer Mohammed M. Al Salah , Paola M. Muanamoki , Guillaume M. Kiyombo , Crispin K. Mulaji , Jean-Paul Otamonga , John W. Poté
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引用次数: 12

摘要

发展中国家的城市农业在应对消除饥饿、改善粮食安全和人民社会日常生活的挑战方面发挥着巨大的重要社会经济作用。然而,城市农业灌溉用水的质量评估以及新鲜农产品中重金属等污染物的积累在很大程度上仍未得到研究。本研究的目的是调查河流、土壤和Amaranthus viridis(A.viridis)灌溉水中金属(Cr、Co、Ni、Cu、Zn、As、Cd、Pb和Hg)的浓度,以评估潜在的人类饮食风险。这项研究是在刚果民主共和国首都金沙萨的八个以集约农业为特征的地点进行的。结果显示,不同采样点的绿色A.viridis叶片中的高金属浓度差异很大(P<;.05),达到2.97(Cr)、1.73(Co)、12.30(Ni)、16.11(Cu)、652.91(Zn)、0.10(As)、1.62(Cd)、8.91(Pb)和0.1(Hg)的值(以mg kg−1湿重为单位)。这些数值超过了粮食及农业组织/世界卫生组织(世界卫生组织/粮农组织)为人类消费设定的安全限值。使用目标风险商和估计的膳食摄入量对人类健康风险进行的评估显示,由于几个研究地点的叶菜中的Cd和Pb水平,对消费者的健康有潜在危害。蔬菜污染可以解释为用于对抗和预防病毒性A.viridis疾病的化学物质,以及周围的车辆和摩托车排放物。因此,考虑到黄曲霉叶片中金属的浓度,大量连续食用可能会对人类健康产生影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Heavy metal concentration in irrigation water, soil and dietary risk assessment of Amaranthus viridis grown in peri-urban areas in Kinshasa, Democratic Republic of the Congo

Heavy metal concentration in irrigation water, soil and dietary risk assessment of Amaranthus viridis grown in peri-urban areas in Kinshasa, Democratic Republic of the Congo

The urban agriculture in developing countries plays a huge important socioeconomic role in confronting the challenge of eradicating hunger, improving food security and the social daily life of the population. However, the quality evaluation of water used for urban agriculture irrigation as well as the accumulation of pollutants such as heavy metals in fresh produces are still largely unstudied. The purpose of this study was to investigate the concentration of metals (Cr, Co, Ni, Cu, Zn, As, Cd, Pb and Hg) in irrigation water from rivers, soil and Amaranthus viridis (A. viridis), in order to evaluate the potential human dietary risks. The research was conducted in eight sites characterized by intensive agriculture performed in watersheds in Kinshasa, capital of Democratic Republic of the Congo. The results showed high metal concentrations in A. viridis leaf varying considerably among sampling sites (P < .05), reaching the values (in mg kg−1 wet weight) of 2.97 (Cr), 1.73 (Co), 12.30 (Ni), 16.11 (Cu), 652.91 (Zn), 0.10 (As), 1.62 (Cd), 8.91 (Pb), and 0.1 (Hg). These values exceeded safe limits set by Food and Agriculture Organization/World Health Organization for human consumption (WHO/FAO). The assessment of human health risks using the targeted risk quotient and estimated dietary intake showed potential health hazards to consumers due to the levels of Cd and Pb in leafy vegetables from several studied sites. The vegetable contamination can be explained by chemicals used to combat and prevent A. viridis diseases, and the vehicle and motorcycle emissions around. Thus, given the concentrations of metals in A. viridis leaf, human health implications are likely to occur on heavy continuous consumption.

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