There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine.
铀矿山坑道污水含有铀、镭、钍、钋等放射性核素，外排前必须加以处理。
2
There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine. The effluent must be treated before discharging.