Nghiên cứu xác định hàm lượng Cu, Pb, Cd trong loài Hến (Corbicula sp.) và trầm tích sông Cầu đoạn chảy qua tỉnh Bắc Giang và Bắc Ninh=Study on concentration of Cu, Pb and Cd in corbicula sp. and sediments collected along Cau river in Bac Giang and Bac Ninh province

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Thị Thư Bùi, Đăng Ngọc Lê, Thị Hồng Hạnh Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: TC Khoa học trái đất và môi trường – ĐH Quốc gia Hà Nội, 2018

Mô tả vật lý: tr.100-109

Bộ sưu tập: Metadata

ID: 474268

Thêm vào giỏ

Để đánh giá chất lượng trầm tích và lựa chọn sinh vật chỉ thị giám sát ô nhiễm kim loại nặng trong trầm tích sông, chúng tôi đã đánh giá mức độ ô nhiễm Cu, Pb, Cd trong trầm tích và tíchlũy những kim loại nặng này trongmẫu hến (Corbicula sp.) được thu thập tại 12 địa điểm dọc theo sông Cầu đoạn chảy qua tỉnh Bắc Giang và Bắc Ninh vào tháng 01 và tháng 4 năm 2018. Kết quả nghiên cứu cho thấy,hàm lượng Pb trong trầm tích lớn nhất (113,20 - 203,91 mg/kg trầm tích khô), tiếp theo là hàm lượng Cu (20,22 - 77,34 mg/kg trầm tích khô), và thấp nhất là hàm lượng Cd (0,22 - 1,28 mg/kg trầm tích khô). Hàm lượng các kim loại này trong mô loài hến (Corbicula sp.) dao động từ 0,04 đến 3,73mg/kg hến tươi. Kết quả cũng cho thấy hàm lượng Pb trong trầm tích và trong mô loài hến đều vượt quá giới hạn cho phép của QCVN 432012/BTNMT và QCVN 08-22011/BYT. Phân tích tương quan chỉ ra rằng hàm lượng Cu trong trầm tích có tương quan thuận và chặt chẽ (r = 0,54
p<
0,01), hàm lượng Cd không có tương quan (r = 0,27
p>
0,05), và của Pb có tương quan thuận và tương đối cao (r = 0,43, p<
0,05) với hàm lượng của chính các kim loại nặng đó trong mô hến (Corbicula sp.).Từ kết quả nghiên cứu này cho thấy, bước đầu có thể sử dụng loài hến (Corbicula sp.) làm sinh vật chỉ thị giám sát ô nhiễm kim loại nặng trong trầm tích tại sông Cầu.To evaluate the quality of sediments and to select an indicator organism for monitoring heavy metal pollution in river sediments, the sediment samples andCorbicula sp.samples collected in 12 sites along Cau River in Bac Giang and Bac Ninh provinces in January and April, 2018 were analysed for the concentrations of Cu, Pb, Cd in sediments and Corbicula sp.The results showed the highest concentration of Pb in sediment (113.20 - 203.91 mg/kg dried weight), followed by the concentration of Cu (20.22 - 77.34 mg/kg dried weight), and then the lowest concentration of Cd (0.22 - 1.28 mg/kg dried weight). The concentrations of these metals in tissues of Corbicula sp. ranged from 0.04 to 3.73 mg/kg fresh weight. The results also indicated that the concentrations of Pb in sediment and in tissues of Corbicula sp. were higher than the standards prescribed by QCVN 43 2012/BTNMT and QCVN 08-2 2011/BYT. Correlation analysis showed that the concentration of Cu in sediment was positively correlated (r = 0.54
p <
0.01), Cd in sediment was not correlated (r = 0.27
p>
0.05), and Pb was positively correlated (r = 0.43, p <
0.05) with the content of these heavy metals in the tissues of Corbicula sp. Thus, the results of this study initiallyconfirmed that Corbicula sp. could be used as an indicator organism to monitor heavy metal pollution in sediment in Cau River.

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