recycling residue是什么意思

用法例句

The effects of the recycling residue, the concentration of Cu 2+ in solution and pH on the cobalt removal processes from the zinc neutral leaching solution are investigated with the single factor experiments.

采用单因素条件试验研究砷净液除钴工艺中返渣的利用、铜离子加入量和净化pH值等因素对净化效果的影响。