广东省清远市某电子垃圾拆解区农产品和饮用水中镍的非致癌健康风险评估

Non-carcinogenic health risk assessment of nickel in agricultural products and drinking water in an e-waste dismantling area of Qingyuan City,Guangdong Province

对广东省清远市电子垃圾拆解区的蔬菜、大米、鸡蛋和饮用水样品中镍进行测定,评估其非致癌健康风险,计算各样品的每日摄入量(DI)及危险系数(HQ)。该电子垃圾拆解区,大米和鸡蛋镍的含量分别为(0.46±0.24)、(0.16±0.13)μg/g,均高于对照区[大米和鸡蛋镍的含量分别为(0.17±0.03)、(0.02±0.02)μg/g](P值均<0.05)。大米、蔬菜、鸡蛋和饮用水的DI值分别为(3.61~5.86)、(1.75~2.99)、(0.11~0.24)和(0.08~0.12)μg·kg^-1·day^-1,HQ值分别为0.180~0.290、0.090~0.150、0.005~0.010、0.005~0.006。大米、蔬菜、鸡蛋和饮用水的HQ值均<1,为可接受水平,但考虑到重金属联合暴露的可能性,电子垃圾拆解区镍的非致癌健康风险仍需引起足够关注。

Vegetables,rice,eggs and drinking water samples were collected from e-waste dismantling area of Qingyuan City,Guangdong Province.Nickel(Ni)was analyzed in each sample,and the non-carcinogenic health[the daily intake(DI)and hazard quotient(HQ)]of each sample was evaluated.In this e-waste dismantling area,the contents of Ni in rice and eggs were(0.46±0.24)and(0.16±0.13)μg/g,which were higher than those in the control area[the contents of Ni in rice and eggs were(0.17±0.03)and(0.02±0.02)μg/g,respectively](both P values<0.05).The DI values of rice,vegetable,eggs,and drinking water were(3.61-5.86),(1.75-2.99),(0.11-0.24),and(0.08-0.12)μg·kg^-1·day^-1,respectively.The HQ values were 0.180-0.290,0.090-0.150,0.005-0.010,0.005-0.006,respectively.Although the HQ values of rice,vegetable,eggs,and drinking water were all lower than 1,which was an acceptable level.However,considering the possibility of combined exposure of heavy metals,the non-carcinogenic health risks of Ni in the e-waste dismantling area should still be concerned.