Jafarian-Dehkordi A, Alehashem M
Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran.
Res Pharm Sci. 2013 Jan;8(1):51-8.
Vegetables are an inevitable and important part of a healthy and balanced diet. They could be contaminated by heavy metals in many ways including irrigation by sewage water and industrial effluents sewage sludge, vehicular emissions, industrial waste and atmospheric deposition. In this study, we sought to determine if some vegetables (cucumbers, tomatoes, cabbage, lettuce, potatoes, onions, carrots, persian leeks, dill, spinach, coriander, parsley) grown locally in the suburban of Isfahan city and sold in the urban markets are contaminated with cadmium (Cd), chromium (Cr) and lead (Pb). Vegetables were sampled from August to October 2010. After washing, they were oven-dried and digested using three-acid mixture (70% HNO3, 65% HClO4 and 70% H2SO4). Analyzes of the heavy metals was performed using atomic absorption spectrophotometry. To validate the assay method, intra-day and inter-day variation studies were performed. The concentrations (μg/g) of heavy metals in the samples ranged from 0.00 to 3.66 for Cd, 0.00 to 6.00 for Cr and 0.00 to 7.14 for Pb. The highest concentration of heavy metals was for Pb. The results showed that the amount of Cd, Cr and Pb of some samples exceeded the recommended levels. The amount of Cd in cucumber, tomatoes, potatoes with skin, carrots, and spinach was significantly higher in the samples collected from Isfahanak, Dashti and Ilchi farms than those of Dorche farms. Also, the amount of Cr in onion, carrots, and spinach was significantly higher in samples collected from Isfahanak, Dashti and Ilchi farms than those of Dorche farms. However, the amount of Pb in the carrots and leek was significantly higher in the samples collected from Dorche farms than those of Isfahanak, Dashti and Ilchi farms. It can be concluded from the findings of this study that the amounts of Cd, Cr, and Pb were higher than the acceptable levels recommended by WHO/FAO. Also, higher amount of Cd and Cr in some samples collected from Isfahanak, Dashti and Ilchi farms compared to that of the samples collected from Dorche farms may indicate the influence of contaminants that enter ZayadeRood River as it passes Isfahan.
蔬菜是健康均衡饮食中不可或缺的重要组成部分。它们可能通过多种方式受到重金属污染，包括污水和工业废水灌溉、污水污泥、车辆排放、工业废物以及大气沉降。在本研究中，我们试图确定在伊斯法罕市郊区本地种植并在城市市场销售的一些蔬菜（黄瓜、西红柿、卷心菜、生菜、土豆、洋葱、胡萝卜、韭葱、莳萝、菠菜、香菜、欧芹）是否受到镉（Cd）、铬（Cr）和铅（Pb）的污染。蔬菜于2010年8月至10月采样。清洗后，将其烘干并使用三酸混合液（70%硝酸、65%高氯酸和70%硫酸）进行消解。使用原子吸收分光光度法对重金属进行分析。为验证分析方法，进行了日内和日间变异研究。样品中重金属的浓度（μg/g）范围为：镉0.00至3.66、铬0.00至6.00、铅0.00至7.14。重金属浓度最高的是铅。结果表明，一些样品中的镉、铬和铅含量超过了推荐水平。从伊斯法罕纳克、达什提和伊尔奇农场采集的黄瓜、西红柿、带皮土豆、胡萝卜和菠菜样品中的镉含量显著高于多尔切农场的样品。此外，从伊斯法罕纳克、达什提和伊尔奇农场采集的洋葱、胡萝卜和菠菜样品中的铬含量显著高于多尔切农场的样品。然而，从多尔切农场采集的胡萝卜和韭菜样品中的铅含量显著高于伊斯法罕纳克、达什提和伊尔奇农场的样品。从本研究结果可以得出结论，镉、铬和铅的含量高于世界卫生组织/联合国粮食及农业组织推荐的可接受水平。此外，与从多尔切农场采集的样品相比，从伊斯法罕纳克、达什提和伊尔奇农场采集的一些样品中较高的镉和铬含量可能表明污染物在扎亚德罗德河流经伊斯法罕时对其产生的影响。
