Vận chuyển đồng thời của các colloid bentonite và vận chuyển Eu(III) trong môi trường xốp không đồng nhất bão hòa

Journal of Radioanalytical and Nuclear Chemistry - Tập 332 - Trang 1125-1133 - 2023
Zhen Xu1,2, Qingfeng Tang1, Duoqiang Pan1,2, Xiaoyan Wei1, Ximeng Chen1,2,3, Wangsuo Wu1,2,3
1School of Nuclear Science and Technology, Lanzhou University, Lanzhou, China
2Frontier Science Center for Rare Isotopes, Lanzhou University, Lanzhou, China
3Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, China

Tóm tắt

Môi trường dưới lòng đất tự nhiên là một hệ thống phức tạp và không đồng nhất. Các yếu tố chính ảnh hưởng đến sự hình thành dòng chảy không đồng nhất và hành vi đồng vận chuyển của các colloid bentonite với Eu(III) dưới các điều kiện thủy hóa học khác nhau đã được nghiên cứu trong cột cát thạch anh không đồng nhất bão hòa. Cát thạch anh có một hiệu ứng lọc nhất định đối với Eu(III), với các hạt cát lớn hơn hoạt động như một kênh chảy ưu tiên của môi trường không đồng nhất. Cấu trúc của môi trường và độ mạnh của ion cho thấy hiệu ứng cộng hưởng lên hoạt động vận chuyển và giải phóng của Eu(III) trong môi trường xốp đồng nhất/không đồng nhất. Dòng chảy không đồng nhất trong môi trường xốp sẽ làm tăng cường nguy cơ vận chuyển của các hợp chất colloid bentonite-radonuclide trong môi trường lưu trữ.

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