亞甲基藍活性炭吸附

　　氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)是在(zai)氧化(hua)(hua)(hua)鐵(tie)(tie)浸漬活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)后合成(cheng)的。通過(guo)(guo)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)和氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)pH、ZPC和FTIR光(guang)譜表(biao)征。亞(ya)甲(jia)基藍通過(guo)(guo)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)和氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)去(qu)除(chu)。在(zai)7-10的pH氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)的去(qu)除(chu)率(lv)高達95%(高于活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan))。雖然反應動力學是偽二次(ci)的，但(dan)整體速率(lv)由膜擴(kuo)散、孔擴(kuo)散和顆粒擴(kuo)散等多(duo)個過(guo)(guo)程控制(zhi)。活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)和氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)分別為21.79和14.82 kJ / mol)亞(ya)甲(jia)基藍攝入的活(huo)(huo)化(hua)(hua)(hua)能值(zhi)顯(xian)示了(le)物理(li)吸(xi)附過(guo)(guo)程。氧化(hua)(hua)(hua)鐵(tie)(tie)活(huo)(huo)性(xing)(xing)(xing)炭(tan)(tan)(tan)在(zai)再生研究中不(bu)斷出現≥去(qu)除(chu)亞(ya)甲(jia)基藍90%，甚至多(duo)達10次(ci)重復循環。

　　生(sheng)物(wu)體(ti)提(ti)供新鮮(xian)空氣和(he)清潔(jie)水(shui)(shui)(shui)(shui)(shui)非常重要。因(yin)此，保持淡水(shui)(shui)(shui)(shui)(shui)資源的(de)質量(liang)仍(reng)然是(shi)一個挑戰。當然，工(gong)(gong)業(ye)(ye)場所釋(shi)放的(de)污(wu)泥和(he)殘留物(wu)通常含(han)有(you)有(you)害(hai)污(wu)染(ran)物(wu)，會惡化(hua)水(shui)(shui)(shui)(shui)(shui)質。金屬(shu)、染(ran)料、農藥(yao)等(deng)有(you)害(hai)物(wu)質以及(ji)許多抗生(sheng)素作(zuo)為工(gong)(gong)業(ye)(ye)作(zuo)業(ye)(ye)和(he)農業(ye)(ye)徑(jing)流(liu)排放對環境構成嚴(yan)重威(wei)脅。合(he)成染(ran)料賦予(yu)廢(fei)水(shui)(shui)(shui)(shui)(shui)顏色，*終會擾亂(luan)水(shui)(shui)(shui)(shui)(shui)生(sheng)生(sheng)物(wu)的(de)生(sheng)長活(huo)性，并負責增加化(hua)學(xue)需氧(yang)(yang)量(liang)。此外(wai)，水(shui)(shui)(shui)(shui)(shui)生(sheng)植物(wu)生(sheng)長必須通過(guo)(guo)吸收陽光來抑制光合(he)作(zuo)用(yong)。這些(xie)污(wu)染(ran)物(wu)也威(wei)脅到食(shi)物(wu)循環和(he)水(shui)(shui)(shui)(shui)(shui)生(sheng)生(sheng)物(wu)，因(yin)為它(ta)們會導(dao)致(zhi)突變和(he)致(zhi)癌。嘔(ou)吐、黃疸、加速心(xin)率(lv)、休克(ke)和(he)組織壞死是(shi)與染(ran)料有(you)關的(de)健(jian)康風險。因(yin)此，在進入水(shui)(shui)(shui)(shui)(shui)系統之前，對含(han)有(you)染(ran)料的(de)工(gong)(gong)業(ye)(ye)廢(fei)水(shui)(shui)(shui)(shui)(shui)進行處理至關重要。混凝、氧(yang)(yang)化(hua)、吸附、納米過(guo)(guo)濾和(he)絮凝、離子交(jiao)換和(he)膜處理等(deng)大(da)量(liang)物(wu)理化(hua)學(xue)方法(fa)已用(yong)于從廢(fei)水(shui)(shui)(shui)(shui)(shui)和(he)工(gong)(gong)業(ye)(ye)廢(fei)水(shui)(shui)(shui)(shui)(shui)中去除合(he)成染(ran)料。

　　然而，活(huo)性(xing)(xing)(xing)(xing)炭已廣泛(fan)應(ying)用(yong)(yong)(yong)于水(shui)介質的(de)凈(jing)化、氣體/固(gu)相分離、催化和電(dian)化學(xue)過程中(zhong)的(de)吸(xi)(xi)附劑。活(huo)性(xing)(xing)(xing)(xing)炭的(de)表面特性(xing)(xing)(xing)(xing)，即膨脹的(de)孔隙率(lv)和高表面積(ji)，易于分離，運行(xing)成本低，吸(xi)(xi)收親和力顯著，使活(huo)性(xing)(xing)(xing)(xing)炭成為(wei)各種(zhong)應(ying)用(yong)(yong)(yong)的(de)通(tong)用(yong)(yong)(yong)和首選材(cai)料。為(wei)了(le)進一(yi)步提高效率(lv)，研究(jiu)了(le)活(huo)性(xing)(xing)(xing)(xing)炭的(de)修改和可(ke)重用(yong)(yong)(yong)性(xing)(xing)(xing)(xing)。

　　本文簡要(yao)介紹了活(huo)性(xing)(xing)炭(tan)的(de)表(biao)面(mian)改性(xing)(xing)，以改善其對(dui)亞甲(jia)基藍的(de)吸附親和(he)力和(he)廢(fei)(fei)吸附劑的(de)再生。為(wei)了在活(huo)性(xing)(xing)炭(tan)上產(chan)生更多的(de)活(huo)性(xing)(xing)位(wei)點(dian)，用(yong)氧化(hua)劑修飾表(biao)面(mian)，然(ran)后用(yong)鐵(tie)(tie)前(qian)體浸漬，產(chan)生鐵(tie)(tie)浸漬活(huo)性(xing)(xing)炭(tan)。充分表(biao)征活(huo)性(xing)(xing)炭(tan)和(he)氧化(hua)鐵(tie)(tie)活(huo)性(xing)(xing)炭(tan)，研究了水系統的(de)亞甲(jia)基藍攝入。對(dui)于實(shi)際應用(yong)，廢(fei)(fei)吸附劑的(de)可重用(yong)性(xing)(xing)是主要(yao)的(de)經濟效(xiao)益，一是降低運行(xing)成本，二(er)是解決廢(fei)(fei)吸附劑的(de)處理(li)問題，是昂貴的(de)選擇和(he)資源浪(lang)費。

　　由(you)(you)于表面氧(yang)化(hua)(hua)和鐵(tie)浸漬，活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)的(de)(de)表面電荷(he)密度(pH ZPC)從7.4降低(di)到4.3.這有(you)(you)(you)助于增(zeng)加氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)的(de)(de)酸性(xing)(xing)(xing)(xing)特(te)性(xing)(xing)(xing)(xing)，對陽(yang)離子(zi)染料(亞甲基藍(lan))在(zai)水(shui)系統(tong)(tong)中(zhong)具有(you)(you)(you)更高效的(de)(de)吸(xi)附水(shui)平。與其對應(ying)物活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)pH(2-10)環(huan)(huan)境溫度(298K))在(zai)有(you)(you)(you)利條件下，氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)的(de)(de)亞甲基藍(lan)去除(chu)率一(yi)直很高，需(xu)要較低(di)的(de)(de)劑(ji)(ji)量(0.2g顯示高達98%)。動力(li)學建模表明，偽二階模型很好地解釋(shi)了反應(ying)機制，但(dan)整體(ti)吸(xi)附過(guo)程由(you)(you)膜擴散(san)(san)、孔擴散(san)(san)和顆粒擴散(san)(san)控制。目前工作的(de)(de)可行性(xing)(xing)(xing)(xing)和有(you)(you)(you)效性(xing)(xing)(xing)(xing)與廢吸(xi)附劑(ji)(ji)的(de)(de)可重(zhong)用性(xing)(xing)(xing)(xing)研究有(you)(you)(you)關。通過(guo)觀察活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)和氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)的(de)(de)吸(xi)附/解吸(xi)，我(wo)們可以得出結論，氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)比(bi)連續流(liu)動系統(tong)(tong)中(zhong)使用的(de)(de)未(wei)改性(xing)(xing)(xing)(xing)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)更合(he)適。氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)在(zai)10次(ci)循環(huan)(huan)后重(zhong)復(fu)使用，脫(tuo)除(chu)率高達90%，反映其高再生能力(li)。氧(yang)化(hua)(hua)鐵(tie)活(huo)(huo)(huo)性(xing)(xing)(xing)(xing)炭(tan)是從廢水(shui)中(zhong)去除(chu)陽(yang)離子(zi)污染物的(de)(de)優質吸(xi)附劑(ji)(ji)材料。