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Nghiên cứu sự tích lũy của một số kim loại nặng ở vịt bị phơi nhiễm với kim loại nặng trong nước nuôi

Mục tiêu của nghiên cứu này là xác định sự tích lũy sinh học của các kim loại nặng (KLN) (Cu, Zn, Hg, Pb và Cd) trong 15 mô và cơ quan nội tạng khác nhau (não, cơ ức, xương ức, cơ đùi, xương đùi, máu, tim, phổi, mề, gan, ruột, lách, tụy, mật và thận) của vịt nhà được phơi nhiễm với các KLN trong nước nuôi với nồng độ tương đương giới hạn qui định trong Cột B của QCVN 40:2011/BTNMT. | 24 Trường Đại học Nông Lâm TP. Hồ Chí Minh Accumulation of heavy metals in ducks exposed to heavy metals-contaminated water Ha N. Nguyen1 2 Uyen H. Nguyen2 Thuyen H. Nguyen2 Dong V. Nguyen3 amp Tu P. C. Nguyen4 1 Research Institute for Biotechnology and Environment Nong Lam University Ho Chi Minh City Vietnam 2 Faculty of Biological Sciences Nong Lam University Ho Chi Minh City Vietnam 3 Faculty of Chemistry University of Science Ho Chi Minh City Vietnam 4 Faculty of Fisheries Nong Lam University Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper The objective of this study was to determine the bioaccumulation of heavy metals HM Cu Zn Hg Pb and Cd in 15 tissues brain breast mus- Received May 05 2021 cle sternum thigh muscle femur blood heart lung gizzard liver in- Revised June 28 2021 testine spleen pancreas bile and kidney of domestic ducks exposed to Accepted July 05 2021 HM-contaminated water with levels equal to values specified in the column B of QCVN 40 2011 BTNMT. The experiment was a completely random- ized design with two treatments without exposure to HM CT and with Keywords exposure to HM ET . Each treatment was replicated 3 times. Ducks were randomly allocated to the treaments with a stocking density of 10 ducks per cage and reared for 8 weeks. The results showed that concentrations of Bioaccumulation HM particularly toxic metals such as Hg Pb and Cd in all tissues of duck Duck in the CT were lower than those in the ET. The highest levels of HM in Heavy metals tissues were found in the liver and kidney. In the ET Pb levels in kidney Internal organs and bone and Cd levels in liver and kidney exceeded the permissible expo- Tissue sure limit according to the guidance of the Ministry of Health of Vietnam and the European Commission. This study demonstrated that the accumu- Corresponding author lation of HM in duck tissues could happen even though ducks were exposed to relatively low concentrations of HM in water. Thus further investigation .