... precipitation of calcium carbonate ==> 碳酸钙沉淀 precipitation of hydroxide ==> 氢氧化物沉淀 precipitation of salts ==> 盐类沉淀 ...
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贵金属：氢氧化物沉淀+贵金属回收，如蒸发，离子交换等等。
Precious metals: hydroxide precipitation and sedimentation plus precious metal recovery, e. g. evaporation, ion exchange, etc.
含铜废水的处理常用的有离子交换法、槽边电解法和氢氧化物沉淀法。
The conventional methods for treating Cu-containing wastewater include ion exchange, bath side electrolysis and hydroxide precipitation.
后者是指从被污染地下水中沉淀析出石膏、方解石、萤石以及某些重金属元素的氢氧化物、氧化物、酸式盐和碱式盐的过程。
The technogenic sedimentation refers to the precipitation of gypsum, calcite, fluorite, as well as hydroxides, oxides and salts of some heavy metallic elements from polluted groundwater.
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