TÌNH TRẠNG Ô NHIỄM CADMIUM TRONG CÁ VÀ NƯỚC AO NUÔI CÁ TẠI 6 XÃ Ở HUYỆN VŨ THƯ, TỈNH THÁI BÌNH

Abstract

Research was conducted to determine the status of cadmium (Cd) contamination in
water and fish in 117 ponds in 6 communes of Vu Thu district, Thai Binh province (53
circulating pond and 64 uncirculating ponds). The results showed that: Contamination
level in fish of bottom level were 14.87 ± 8.73 ppb (parts per billion) and fish of surface
level was 12.86 ± 8.08 ppb with p <0.05; Cd in water of the bottom level was 0.42 ± 1.12
ppb and surface water was 0.23 ± 0.39 ppb. The average Cd content of the fish in the
cramped ponds was 15.12 ± 8,91 ppb and in circulating ponds was 12.05 ± 6.95 ppb with
p <0.05. The Cd content in cramped pond water was 0.31 ± 0.55 ppb and in the circulating
pond was 0.30 ± 0.57 ppb with p> 0.05. Concentration of Cd in fish in average dry season
was 14.96 ± 9.5 ppb and rainy season was 12.25 ± 5.97 ppb. Cd concentration in water in
the dry season was 0.42 ± 0.85 ppb and the rainy season was 0.16 ± 0.3 ppb with p <0.05.