| 摘要: |
| 根据化学共沉淀原理对污水中重金属净化的可能性进行了研究。选用FeSO4和AlCl3为共沉淀剂,以Cu、Cd、Cr、Hg和Pb为污染重金属。当pH7.0～8.0,共沉淀剂用量浓度为10.0 μg/mL,共沉淀时间为24h,共沉淀重金属浓度为:Cu<50 μg/mL,Pb<10 μg/mL,Cd<5.0 μg/mL,Hg
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| 关键词: 共沉淀,净化,污水,重金属 |
| DOI： |
| 分类号: |
| 基金项目: |
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| The Removal of Heavy Metals in Sewage by Coprecipitation |
|
Liu Junhua Xue Chengze
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| Abstract: |
| The method of removing heavy metals in waste water by using
coprecipitation was studied.FeSO4 and AlCl3 were selected as coprecipitants.
Cd,Cu,Hg,Cr and Pb were served as the polluted heavy metals in sewage.
The suitable pH of solution was adjusted to 7.0～8.0 and the appropriate
amount of coprecipitants was 10.0 μg/mL. after coprecipitants were dded to,
it must be settled at least for 24 hours.when the concentration of heavy metals
was:Cu<50 μg/mL,Pb<10 μg/mL;Cd<5.0 μg/mL;Hg<0.5 μg/mL,Cr<0.5 μg/mLL,the removing efficiency was very good.Owing to the form of Cr(Ⅵ)
presented as negative ion in the solution,when the concentration of Cr(Ⅵ) was
more than 1.00 μg/mL,most of which still remained in solution.All these
conditions of coprecipitation were quite suitable for the removing heavy metals from
lagoon sewage. |
| Key words: coprecipitation, purification, sewage, heavy metal |
