摘要:

采用電(dian)(dian)(dian)(dian)動修復(fu)(fu)裝(zhuang)置,選用電(dian)(dian)(dian)(dian)鍍污泥(ni)作為(wei)(wei)試(shi)驗(yan)(yan)(yan)材料,試(shi)驗(yan)(yan)(yan)設計(ji)了(le)(le)3個不(bu)(bu)同(tong)pH值的(de)(de)陰極(ji)緩沖液(ye)處理,施加(jia)直流(liu)(liu)電(dian)(dian)(dian)(dian)壓(ya)32V,運行7d,研究(jiu)了(le)(le)不(bu)(bu)同(tong)pH值陰極(ji)緩沖液(ye)對(dui)電(dian)(dian)(dian)(dian)鍍污泥(ni)電(dian)(dian)(dian)(dian)動修復(fu)(fu)過程(cheng)的(de)(de)影(ying)響.結果表明,陰極(ji)緩沖液(ye)pH值的(de)(de)變化(hua),影(ying)響了(le)(le)電(dian)(dian)(dian)(dian)動過程(cheng)中(zhong)電(dian)(dian)(dian)(dian)流(liu)(liu)大(da)小,pH較(jiao)低時,電(dian)(dian)(dian)(dian)流(liu)(liu)較(jiao)大(da);pH較(jiao)高時,電(dian)(dian)(dian)(dian)流(liu)(liu)較(jiao)小.電(dian)(dian)(dian)(dian)動修復(fu)(fu)后,各處理電(dian)(dian)(dian)(dian)鍍污泥(ni)重(zhong)金屬的(de)(de)電(dian)(dian)(dian)(dian)動修復(fu)(fu)效(xiao)果不(bu)(bu)同(tong),其中(zhong),pH值控制(zhi)為(wei)(wei)3時,Ni、Cu、Zn和(he)(he)Cr的(de)(de)去(qu)除率分別達到(dao)70%、59%、30%和(he)(he)29%,而Pb的(de)(de)去(qu)除率在(zai)(zai)pH值控制(zhi)為(wei)(wei)5時去(qu)除率達46%.各處理截面重(zhong)金屬濃度較(jiao)實驗(yan)(yan)(yan)前都有(you)不(bu)(bu)同(tong)程(cheng)度的(de)(de)降低,其中(zhong)Cu、Pb和(he)(he)Ni在(zai)(zai)不(bu)(bu)同(tong)污泥(ni)截面分布較(jiao)均勻(yun),而Cr和(he)(he)Zn在(zai)(zai)各截面分布波(bo)動較(jiao)大(da).電(dian)(dian)(dian)(dian)動修復(fu)(fu)對(dui)各種(zhong)形態的(de)(de)重(zhong)金屬都有(you)不(bu)(bu)同(tong)程(cheng)度的(de)(de)去(qu)除,對(dui)可(ke)交(jiao)換態和(he)(he)鐵(tie)錳氧化(hua)物(wu)態的(de)(de)去(qu)除效(xiao)果較(jiao)差,對(dui)碳(tan)酸鹽(yan)結合態和(he)(he)殘渣態有(you)明顯去(qu)除,有(you)機硫化(hua)物(wu)態去(qu)除效(xiao)果一般(ban).

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