Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Đặc trưng hóa chất hữu cơ hòa tan màu sắc và mối quan hệ giữa các thành phần PARAFAC với các tham số chất lượng nước ở Hắc Long Giang, Trung Quốc
Tóm tắt
Chất hữu cơ hòa tan màu sắc (CDOM) là một chất hoạt động quang quan trọng có khả năng vận chuyển chất dinh dưỡng và ô nhiễm từ hệ thống đất liền đến nước. Ngoài ra, nó còn được sử dụng như một tiêu chí đánh giá chất lượng nước. Để điều tra nguồn gốc và thành phần của CDOM, chúng tôi đã sử dụng các phân tích hóa học và huỳnh quang để đặc trưng hóa CDOM ở Hắc Long Giang. Thành phần của CDOM có thể được điều tra bằng ma trận phát xạ kích thích (EEM) và phân tích yếu tố song song (PARAFAC). PARAFAC đã xác định bốn thành phần riêng lẻ được quy cho chất hữu cơ giống humic vi sinh (C1) và chất hữu cơ giống humic đất liền (C2–4) trong các mẫu nước được thu thập từ sông Hắc Long Giang. Mối quan hệ giữa cường độ huỳnh quang tối đa của bốn thành phần PARAFAC và các tham số chất lượng nước cho thấy động lực của bốn thành phần này liên quan đến chất dinh dưỡng trong sông Hắc Long Giang. Mối quan hệ giữa thành phần huỳnh quang C3 và nhu cầu oxy sinh hóa (BOD5) cho thấy thành phần C3 đóng góp đáng kể vào BOD5 và có thể được sử dụng như một nguồn carbon cho vi sinh vật trong sông Hắc Long Giang. Hơn nữa, mối quan hệ giữa thành phần C3, carbon hữu cơ lơ lửng (POC) và nhu cầu oxy hóa học (CODMn) cho thấy thành phần C3 và POC đều đóng góp đáng kể vào BOD5 và CODMn. Việc sử dụng các chỉ số này cùng với kết quả PARAFAC sẽ giúp đặc trưng hóa mối tương quan giữa CDOM và các tham số chất lượng nước ở sông Hắc Long Giang.
Từ khóa
#chất hữu cơ hòa tan màu sắc #chất lượng nước #PARAFAC #oxy hóa học #Hắc Long GiangTài liệu tham khảo
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