Many minerals in nature have the self-purification capacity to hold and stabilize deleterious contaminant, which can be used to deal with heavy metalcontaminants.
自然界中的许多矿物自身赋有容纳和稳定有害物质的自净化能力，可用于重金属类污染物的治理。
2
Surface smoothness, oxygen and carbon contaminants were enough to explain deviations of calibrated sensitivities from the models predictions for metal photocathodes.
同时，阴极表面粗糙度、氧和碳沾污可以解释金属光阴极的实际灵敏度曲线与模型预测的偏离。
3
An overview of internal and external study is made on high temperature purification of gaseous contaminants including sulfur, nitrogen and chlorine pollutants, alkali metal, heavy metal and tar vapor.