Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Mô hình phân bố và tình trạng ô nhiễm thông qua phân tích hàm lượng một số kim loại nặng trong trầm tích ven biển từ miền nam Biển Caspi
Tóm tắt
Hàm lượng các nguyên tố kim loại nặng (Zn, Cd, Pb, Cu, Ni, Co, Mn và Fe) trong trầm tích bề mặt ở bốn khu vực (bờ biển, cửa sông, các dòng sông đổ ra biển, và vịnh Gorgan) dọc theo bờ biển phía nam của Biển Caspi đã được điều tra vào mùa hè năm 2015. Dữ liệu thu thập được đã được áp dụng để đánh giá mức độ ô nhiễm trầm tích và nguồn gốc của các chất ô nhiễm dựa trên Chỉ số Tích lũy Địa chất. Tình trạng ô nhiễm đã được đánh giá thông qua Hệ số Tăng cường (EF) và Chỉ số Rủi ro Sinh thái Tiềm năng (PERI, chỉ số Hakanson). Hàm lượng kim loại nặng trong trầm tích tính theo mg g−1 dw dao động từ 3000 đến 39,500 đối với Fe, 166,66 đến 2000 đối với Mn, 11 đến 4198 đối với Zn, không phát hiện (ND) đến 822,83 đối với Pb, ND đến 40,66 đối với Cd, 6,16 đến 37,16 đối với Cu, 11,66 đến 69 đối với Ni, và 6,33 đến 33,00 đối với Co. Hàm lượng Cd, Pb, Cu, Mn và Fe cao hơn được xác định trong các dòng sông đổ trầm tích ra biển. Tại vịnh Gorgan, Zn, Ni, và Co là cao nhất. Mức độ rủi ro sinh thái tiềm năng lớn hơn được phát hiện dọc theo bờ biển cũng như trong các dòng sông đổ ra biển. Trong các kim loại nặng được xem xét, Zn và Cd có hệ số tăng cường cao nhất. Chỉ số Tích lũy Địa chất cho thấy khu vực được điều tra có thể được phân loại là khu vực ô nhiễm Zn và Cd.
Từ khóa
#kim loại nặng #ô nhiễm trầm tích #Chỉ số Tích lũy Địa chất #Hệ số Tăng cường #Rủi ro Sinh thái Tiềm năng #Biển CaspiTài liệu tham khảo
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