赭石對(duì)模擬重金屬?gòu)U水的吸附效果研究
更新時(shí)間：2014-07-15 11:01
來(lái)源：環(huán)境工程學(xué)報(bào)
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閱讀：1838
| 中文摘要: |
| 采用模擬重金屬?gòu)U水的正交試驗(yàn)設(shè)計(jì)，進(jìn)行赭石對(duì)模擬重金屬?gòu)U水的吸附效果研究，探討pH、赭石加入量和振蕩時(shí)間等影響因素對(duì)吸附效果的影響。結(jié)果表明，在一定pH、赭石加入量和振蕩時(shí)間條件下，赭石對(duì)6種重金屬（Pb、Cd、Mn、Zn、Cr和Ni）均有較好吸附效果，對(duì)Pb、Cd、Mn、Zn和Cr的最大吸附率可達(dá)100%，對(duì)Ni的吸附率達(dá)8963%。處理后廢水中重金屬達(dá)到污水排放標(biāo)準(zhǔn)。各影響因素對(duì)Mn、Zn和Cr吸附效率的影響大小表現(xiàn)為：pH＞赭石加入量＞振蕩時(shí)間，Ni和Cd表現(xiàn)為：赭石加入量＞pH＞振蕩時(shí)間，Pb表現(xiàn)為：pH＞振蕩時(shí)間＞赭石加入量。赭石對(duì)廢水中重金屬吸附的最佳條件為赭石加入量40 g/L，pH 10～10.5，振蕩時(shí)間2 h。 |
| 英文摘要: |
| The heavy metal absorption effect of ochre from the simulated wastewater was conducted by the orthoganal design and the effects of pH, ochre amount and shake time on the heavy metal absorption were analyzed．The results showed that ochre had high absorbing efficiency to Pb, Cd, Mn, Zn, Cr, Ni under certain pH, ochre amount and shake time．The maximum removal rates of Pb，Cd，Mn，Zn，Cr all can reach 100%, Ni can reach 89.63%, which are under the Integrated Wastewater Discharge Standard of China．The influencing effect of different factors on Mn, Zn, Cr absorption were in the order of pH＞ochre amount＞shake time．Ni and Cd were in the order of ochre amount＞pH＞shake time, Pb was pH＞shake time＞ochre amount．The optimum absorption conditions of heavy metal from wastewater by ochre were ochre amount 40 g/L, pH 10～10.5, 2 hours shake time． |
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