Đánh giá sự phân tán đồng, yếu tố phơi sáng và hiệu quả diệt tảo trong một kênh tưới tiêu sau khi ứng dụng ngắn hạn đồng chelate

Springer Science and Business Media LLC - Tập 8 - Trang 1-9 - 2018
Ben E. Willis1, Mike Pearce2, West M. Bishop1,3
1SePRO Research & Technology Campus, SePRO Corporation, Whitakers, USA
2SePRO Corporation, Carmel, USA
3Department of Crop and Soil Sciences, North Carolina State University, Raleigh, USA

Tóm tắt

Sự phát triển của tảo phiền toái là mối đe dọa đáng kể đối với các kênh tưới tiêu phục vụ cho việc dẫn nước và kiểm soát lũ. Các loại thuốc diệt tảo chứa đồng thường được sử dụng để kiểm soát tảo trong nước chảy. Trong nghiên cứu này, chúng tôi đã theo dõi việc ứng dụng một mô hình sử dụng mới của loại thuốc diệt tảo chelate đồng vào một kênh chảy và đánh giá hiệu quả bằng phương pháp nghiên cứu ở quy mô phòng thí nghiệm với phơi nhiễm thực địa sử dụng một loại tảo thường gặp trong nước chảy (Oedogonium sp.). Nồng độ đồng cao nhất (3.17 ppm) được đo ở vị trí 0.80 km từ địa điểm ứng dụng, mặc dù nồng độ này giảm đáng kể ở mỗi khoảng thời gian lấy mẫu cho đến điểm lấy mẫu 9.66 km, và vẫn ở mức 0.2 ppm hoặc thấp hơn tại khoảng cách 9.66–19.31 km từ địa điểm ứng dụng. Khối lượng đồng giảm dần theo một đường cong mũ (R2 = 0.9558), và chưa đến 10% đồng đã được hồi phục ở vị trí 9.66 km hoặc xa hơn từ địa điểm ứng dụng. Nồng độ đạt đỉnh giảm theo quy luật phân rã mũ (R2 = 0.9922) và được dự đoán sẽ đạt đến nồng độ nền tại khoảng cách 20.9 km từ ứng dụng. Các thử nghiệm trong phòng thí nghiệm có quy mô cho thấy khả năng kiểm soát ở mức phơi nhiễm đạt được tại 6.44 km từ ứng dụng. Nghiên cứu này chứng minh một phương pháp nhằm nâng cao hiệu quả hoạt động trong việc sử dụng đồng trong nước chảy để đạt được hiệu quả kiểm soát tảo mong muốn, đồng thời giảm tổng lượng đồng sử dụng và tuân thủ các mức xả thải hiện hành.

Từ khóa

#diệt tảo #đồng chelate #kênh tưới tiêu #hiệu quả diệt tảo #kiểm soát tảo #phân tán đồng #phơi sáng

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