Đánh giá rủi ro sinh thái do tích luỹ kim loại nặng trong trầm tích mặt tại sông Bồng Miêu, Quảng Nam

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Phước Cường Lê, Văn Hào Lê

Ngôn ngữ: vie

Ký hiệu phân loại: 338.479159 Secondary industries and services

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Đà Nẵng, 2023

Mô tả vật lý: 51-57

Bộ sưu tập: Metadata

ID: 502477

Thêm vào giỏ

In this study, the accumulation level and ecological risks of several heavy metals (As, Pb, Cd, Hg, Cu, Cr, Zn) in surface sediments of Bong Mieu river, Quang Nam province was assessed. Research results showed that, in two sampling periods, the concentrations of Hg, Cu, Cr, Zn, Cd elements in sediments were all within the acceptable limits of VNTR 43:2017/MONRE, particularly As and Pb at all sampling locations were significantly higher than VNTR 43:2017/ MONRE, specifically As was 4.1 - 25.4 times higher, Pb was 2.3 - 7.8 times higher. Concentrations of heavy metals in the dry season tend to be higher than in the wet season. The level of contamination accumulation in the sediments of As, Pb is at a heavy contaminated, there are signs of Cd contamination, the remaining heavy metals have not shown any signs of contamination or moderately.Nghiên cứu này tiến hành đánh giá khả năng tích lũy và rủi ro sinh thái một số kim loại nặng (As, Pb, Cd, Hg, Cu, Cr, Zn) trong trầm tích mặt sông Bồng Miêu, tỉnh Quảng Nam. Kết quả nghiên cứu cho thấy, trong hai đợt lấy mẫu, nồng độ của các nguyên tố Hg, Cu, Cr, Zn, Cd trong trầm tích mặt đều nằm trong giới hạn cho phép của QCVN 43:2017/BTNMT (Quy chuẩn kỹ thuật Quốc gia về chất lượng trầm tích), riêng nồng độ As và Pb tại tất cả các vị trí lấy mẫu đều cao hơn nhiều lần so với QCVN 43:2017/BTNMT, cụ thể As cao hơn từ 4,1 - 25,4 lần, Pb cao hơn từ 2,3 - 7,8 lần. Nồng độ các kim loại nặng ở mùa khô có xu hướng cao hơn mùa mưa. Mức độ tích lũy ô nhiễm trong trầm tích của As, Pb ở mức nặng, có dấu hiệu ô nhiễm Cd, các kim loại nặng còn lại chưa thấy dấu hiệu ô nhiễm hoặc ô nhiễm nhẹ.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR