So sánh Ảnh hưởng của Biochar, Xỉ và Quặng Sắt-Mangan đối với Sự Immobilization của Chì và Cadmium trong Đất

Springer Science and Business Media LLC - Tập 100 - Trang 286-292 - 2017
Sajid Mehmood1, Muhammad Rizwan1, Saqib Bashir1, Allah Ditta2, Omar Aziz1, Li Zhe Yong1, Zhihua Dai1, Muhammad Akmal3, Waqas Ahmed4, Muhammad Adeel5, Muhammad Imtiaz6, Shuxin Tu1
1College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
2Department of Environmental Sciences, Shaheed Benazir Bhutto University Sheringal, Dir (U), Pakistan
3Department of Soil Science & SWC, PMAS Arid Agriculture University, Rawalpindi, Pakistan
4Institute of Agricultural Resources and Regional Planing, Chinese Academy of Agricultural Sciences, CAAS, Beijing, China
5Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
6School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China

Tóm tắt

Nhiều phương pháp cải tạo đã được áp dụng cho đất nhiễm kim loại nặng, tuy nhiên, việc immobilization các kim loại trong đất đồng nhiễm vẫn chưa được làm rõ. Do đó, một nghiên cứu ủ đã được thực hiện để đánh giá các tác động tức thời của các nồng độ khác nhau của biochar (BC), xỉ (SL) và quặng sắt-mangan (FMO) đối với sự immobilization của Pb và Cd thông qua quy trình rửa độc tố (TCLP) theo tiêu chuẩn của Cơ quan Tham khảo Cộng đồng Châu Âu (BCR), CaCl2 và NH4NO3. Phép chiết tách tuần tự của BCR cho thấy giảm các phân đoạn hòa tan trong axit, trong khi tỷ lệ còn lại của Pb và Cd được cải thiện với nồng độ SL và BC tăng lên. Việc bổ sung BC đã làm giảm đáng kể các phân đoạn có thể chiết xuất của cả hai kim loại thông qua TCLP, NH4NO3 và CaCl2 so với SL và FMO. Trong số tất cả các chất cải tạo, việc kết hợp BC vào đất đồng nhiễm đã mang lại kết quả đầy hứa hẹn cho sự immobilization Pb và Cd. Tổng thể, tất cả các chất cải tạo đều cho thấy tác động tích cực và lâu dài đối với việc phục hồi đất đồng nhiễm kim loại nặng và đáng được nghiên cứu theo dõi nâng cao ở quy mô hiện trường.

Từ khóa

#biochar #xỉ #quặng sắt-mangan #chì #cadmium #đất #cải tạo #immobilization #kim loại nặng

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