Unfortunately, the ion-exchange technique traps many more non-radioactive iron ions than radioactivecobalt ones.
遗憾的是，这种离子交换技术所捕获的非放射性铁离子比放射性钴离子还多得多。
2
He thinks that the new polymer could also be used to decontaminate decommissioned nuclear power-stations where residual radioactivecobalt in pipes remains a problem.
他认为新型聚合物还可以用来清除废弃核电站里的污染。这些地方的管道内残余的放射性钴还仍然是一个问题。
3
And they still may need to retest for other radioactive isotopes that had been found in the seawater around the No. 2 reactor, including troubling quantities of cesium, barium, cobalt and lanthanum.