Nghiên cứu quá trình chuyển hóa photpho trong nước và trầm tích để đề xuất các giải pháp thích hợp xử lý ô nhiễm hồ đô thị Hà Nội

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: THỊ THỦY BÙI, GS.TRẦN ĐỨC HẠ, THÚY ANH TRẦN

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2023

Mô tả vật lý: tr.60

Bộ sưu tập: Metadata

ID: 339024

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu tập trung tìm hiểu mối quan hệ thành phần photpho trong pha nước và pha trầm tích của 2 nhóm hồ đô thị (HĐT) ở Hà Nội (nhóm 1: hồ đã được tách nước thải và nhóm 2: hồ chưa được tách nước thải). Kết quả cho thấy, do tích lũy P trong bùn lắng đáy hồ, một lượng lớn photpho đơn dễ dàng xâm nhập vào nước hồ khi có điều kiện thuận lợi, gây hiện tượng phú dưỡng hồ. Đồng thời, nguy cơ ô nhiễm môi trường nước hồ do phú dưỡng của HĐT nhóm 2, là nhóm hồ chưa được tách nước thải, nạo vét và kè bờ, cao hơn rất nhiều so với hồ nhóm 1. Trên cơ sở này, nghiên cứu đề xuất giải pháp kỹ thuật tổng hợp để giảm thiểu suy thoái và cải thiện chất lượng nước cho các HĐT theo nguyên tắc tiếp cận ngăn ngừa ô nhiễm từ bên ngoài vào và loại bỏ nguồn ô nhiễm trong hồ. Nhóm giải pháp ngăn ngừa ô nhiễm từ bên ngoài, chủ yếu áp dụng cho nhóm hồ thứ hai, bao gồm kè bờ và tách nước thải. Nhóm giải pháp loại bỏ nguồn ô nhiễm trong hồ, áp dụng cho cả hai nhóm hồ, có thể kể đến như là: nạo vét bùn cặn lắng đọng, kiểm soát để giữ photpho lại trong bùn trầm tích bằng tổ hợp hóa chất gốc muối kim loại sắt hoặcnhôm. Từ khóa: Hồ đô thị
chu trình photpho
bùn trầm tích hồ
nạo vét bùn
phú dưỡng.The study focuses on understanding the relationship of phosphorus composition in the water and sedimentary phases of 2 groups of Hanoi urban lakes (Group 1 includes wastewater-separated lakes, and Group 2 includes wastewater non-separated lakes). The results showed that, due to the accumulation of Phosphorus in the sediment at the lake bottom, a large amount of orthophosphate quickly penetrates the lake water in favorable conditions, causing eutrophication. At the same time, the risk of environmental pollution of lake water due to eutrophication of group 2, which has not been separated from wastewater, dredged, and embankment, is much higher than that of group 1. On this basis, the study proposes integrated technical solutions to minimize degradation and improve water quality for Hanoi urban lakes according to the principle of approaching pollution prevention from outside and eliminating pollution sources in the lake. The solutions to prevent pollution from outside are mainly applied to the second group of lakes, including embankment and wastewater separation. The solutions to eliminate pollution sources in the lake, applicable to both groups of lakes, can be mentioned as dredging of deposited sludge and controlling to keep Phosphorus in the sediment by a combination of salt-based chemicals, namely iron or aluminum metal. Keyword: Urban lakes
Phosphorus cycle
lake sediments
sludge dredge
eutrophication.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR