Bài viết Đánh giá hiện trạng và đề xuất giải pháp quản lý kim loại nặng trong trầm tích lưu vực sông Sài Gòn Đánh giá xu hướng phân bố hàm lượng tổng kim loại nặng; Các dạng kim loại nặng; Mức độ rủi ro ô nhiễm kim loại nặng; Mối tương quan giữa đặc tính hóa lý và kim loại nặng trong trầm tích lưu vực sông Sài Gòn. | VNU Journal of Science Earth and Environmental Sciences Vol. 39 No. 2 2023 95-111 Original Article Assessing the Current Status and Proposing Solutions for Heavy Metal Management in the Saigon River Basin Sediments Nguyen Xuan Tong Pham Thi Bich Van Le Hung Anh Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Go Vap Ho Chi Minh City Vietnam Received 06 Janurary 2023 Revised 22 February 2023 Accepted 07 April 2023 Abstract The sediment is the final environment where heavy metals accumulate and directly impact the health of aquatic systems and humans. Therefore the study was carried out to determine the total content and forms of heavy metals in the sediments at 13 locations in the Saigon River basin in rain and dry seasons of 2022. In addition this research also assesses the pollution risk level and the correlation between heavy metals and physicochemical properties in the sediments. Chemical analysis was applied to determine the contributors of heavy metals while the geochemical calculation methods hazard quotient HQ geo-accumulation index Igeo pollutant load index PLI individual contamination factors ICF and global contamination factors GCF risk assessment code RAC were used to assess the pollution risk level in river sediments. The results show that Ag Ba Mn and Zn were metals with high pollution risks especially in rain season. The results showed that the total concentration of heavy metals in sediments in rain season ranges from to 1 Mn gt Zn gt Li gt Ba gt Ag gt Cr gt Cu gt Pb and in dry season from 0 to 1 Mn gt Ag gt Zn gt Li gt Ba gt Cr gt Cu gt Pb . Applying the sequential extraction method the metal forms of Ba Cr Cu and Li in the sediment samples are mainly residues F5 up to proving these elements dominated by natural sources. In contrast the Mn extract composition was strongly influenced by human activity with exchange F1 gt 50 and carbonate F2 gt 20 components predominating. For Ag Pb and Cu were .
