Chất lượng nước ngầm và rủi ro cho sức khỏe khi sử dụng nước nhiễm asen tại An Giang

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Tác giả: Thanh Giao Nguyễn

Ngôn ngữ: Vie

Ký hiệu phân loại: 624 Civil engineering

Thông tin xuất bản: Nông nghiệp và Phát triển nông thôn, 2020

Mô tả vật lý: 124 - 131

Bộ sưu tập: Metadata

ID: 419291

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Tóm tắt
Chủ đề

Ô nhiễm asen trong nước ngầm là một trong những mối đe dọa lớn đối với sức khỏe. Nghiên cứu được tiến hành nhằm đánh giá chất lượng nước ngầm và rủi ro sức khỏe con người do sử dụng nước ngầm nhiễm asen tại 13 giếng quan trắc thuộc 8 huyện của tinh An Giang qua hai năm 2017 và 2018. Kết quả phân tích cho thấy tại hầu hết các giếng quan trắc đều nhiễm coliforms. Các giếng quan trắc tại An Phú, Tân Châu, Phú Tân và Chợ Mới có hàm lượng tổng chất rắn hòa tan (TDS), amoni (NH4+ - N) trung bình đều cao hơn QCVN 09-MT 2015/BTNMT. Tại điểm An Phú có hàm lượng asen khá cao và vượt quy chuẩn cho phép. Nguy cơ ung thư do sử dụng nước ngầm nhiễm asen đạt từ mức trung bình đến cao tại các vị trí quan trắc với chỉ số rủi ro dao động từ 1,43 x 10-4 - 1,96 x 102. Như vậy nước ngắm nhiễm asen gây nhiều rủi ro sức khỏe cho con người, nên việc xử lý nồng độ asen trong nước ngầm đạt mức khuyến cáo của EPA hay thay thể nguồn nước sinh hoạt khác là hết sức cần thiết., Tóm tắt tiếng anh, Arsenic pollution in groundwater is one of the major health threats. This study was conducted to assess the quality of groundwater and human health risks due to the use of arsenic-contaminated groundwater in 13 monitoring wells in 8 districts of An Giang province in 2017 and 2018. The findings revealed that most monitoring wells were contaminated with coliforms. Total dissolved solid (TDS) and ammonium (NH, -N) in the monitoring wells in An Phu, Tan Chau. Phu Tan and Cho Moi were higher than those regulated by QCVN 09-MT 2015/BTNMT. At An Phu site, arsenic concentration was relatively high and exceeds the permitted standard. The risk of cancer due to the use of arsenic-contaminated groundwater ranged from medium to high level at the monitoring sites with a risk index ranging from 1.43x10-4 to 1.96x10-2, Thus, arsenic-contaminated groundwater could pose potentially severely health risk to human, so it is necessary to treat arsenic in groundwater to safe level as recommended by EPA or use alternative clean water sources.

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