Heavy metals are toxic in nature, and their contamination in foodstuff is a matter of concern for human health. The present study was conducted to assess the concentrations of chromium, nickel, copper, arsenic, cadmium, and lead in rice and vegetables and their possible human health risks in Tangail district, Bangladesh. Metals were measured by inductively coupled plasma mass spectrometry (ICP-MS) after microwave digestion system. The average values of Cr, Ni, Cu, As, Cd, and Pb in rice and vegetables were 16.26, 16.11, 13.99, 2.28, 1.86, and 7.93 mg/kg, respectively. The average metal concentration in rice and vegetable species was in the decreasing order of okra > chili > bitter gourd > papaya > brinjal > bean > bottle gourd > rice > cucumber > sponge gourd > Indian spinach. The estimated daily intake (EDI) values of all the metals except Cu were higher than the maximum tolerable daily intake (MTDI). The target hazard quotients (THQs) values of Ni, Cu, As, Cd, and Pb exceeded the threshold value of 1 through consumption of rice and vegetables, indicating significant health risks to both adult and children. The target carcinogenic risk (TR) of As and Pb through consumption of rice and vegetables was higher than the USEPA threshold level (10⁻⁴). From the health point of view, this study clearly revealed that consumption of these contaminated rice and vegetables definitely poses carcinogenic and non-carcinogenic risks.

重金属本质上是有毒的，它们在食品中的污染是人类健康所关注的问题。本研究旨在评估孟加拉国坦盖尔地区大米和蔬菜中铬，镍，铜，砷，镉和铅的含量及其对人类健康的潜在风险。微波消解后，通过电感耦合等离子体质谱法（ICP-MS）测量金属。大米和蔬菜中Cr，Ni，Cu，As，Cd和Pb的平均值分别为16.26、16.11、13.99、2.28、1.86和7.93 mg / kg。水稻和蔬菜物种中的平均金属浓度依次为秋葵>辣椒>苦瓜>木瓜>茄子>豆>葫芦>大米>黄瓜>海绵葫芦>印度菠菜。除铜外，所有金属的估计每日摄入量（EDI）值均高于最大容许每日摄入量（MTDI）。通过食用大米和蔬菜，镍，铜，砷，镉和铅的目标危险系数（THQs）值超过了阈值1，表明对成人和儿童均存在重大健康风险。通过食用大米和蔬菜引起的砷和铅的目标致癌风险（TR）高于美国环保局的阈值水平（10^-4）。从健康的角度来看，这项研究清楚地表明，食用这些受污染的大米和蔬菜肯定会构成致癌和非致癌风险。