本文選題：脫墨污泥 + 活性炭　； 參考：《天津科技大學(xué)》2017年碩士論文

【摘要】：廢紙再生脫墨過程中會產(chǎn)生大量脫墨污泥,我國廢紙漿消耗在紙漿中所占比例超過65%,因此脫墨污泥產(chǎn)量巨大。脫墨污泥處理成本高、難度大,對環(huán)境危害大,是廢紙再生主要固廢;活性炭作為一種高效吸附材料,在水處理、醫(yī)藥、食品等諸多領(lǐng)域具有廣泛的應(yīng)用,以脫墨污泥為原料制備活性炭,實現(xiàn)廢棄物高值化利用,對實現(xiàn)脫墨污泥的無害化處理,提高產(chǎn)品附加值等具有深遠(yuǎn)的經(jīng)濟(jì)和社會意義,符合循環(huán)經(jīng)濟(jì)發(fā)展模式。本論文以脫墨污泥為原料,通過磷酸活化法制備活性炭,并將其應(yīng)用于模擬金屬廢水的吸附研究。通過正交實驗和單因素條件實驗確定了活性炭最佳制備工藝條件為:活化溫度450℃、活化時間90min、浸漬比1:3.5、磷酸濃度70%。最優(yōu)條件下活性炭碘吸附值和亞甲基藍(lán)吸附值分別達(dá)到421.98 mg/g和10.97 mL/0.1g;通過N2吸附-脫附實驗計算得到活性炭比表面積為715.576 m2/g,總孔容為0.353 mL/g,平均孔徑為18.573 nm,為中孔活性炭。掃描電鏡分析表明脫墨污泥中碳酸鈣等無機(jī)填料在活性炭制備過程中的溶出可產(chǎn)生大量直徑為1～5μm左右的孔隙結(jié)構(gòu),存在提高活性炭吸附的傳質(zhì)優(yōu)勢;XRD分析證明脫墨污泥基活性炭石墨化程度高,孔隙結(jié)構(gòu)穩(wěn)定性好;傅里葉紅外檢測活性炭表面具有酚羥基、羧基等官能團(tuán),有利于活性炭的吸附;活性炭的浸出毒性檢測表明,浸出液濃度均遠(yuǎn)低于國家允許最高濃度,通過磷酸法以脫墨污泥為原料制備活性炭工藝總體可行。將脫墨污泥活性炭應(yīng)用于Cr (Ⅵ)的吸附研究,并對其吸附條件進(jìn)行優(yōu)化。在最優(yōu)條件下,即活性炭用量15g/L、Cr (Ⅵ)溶液濃度150mg/L、吸附時間6h,活性炭對Cr (Ⅵ)的去除率和吸附量分別為87.12%和8.71 mg/g;動力學(xué)實驗測定了脫墨污泥基活性炭對Cr(Ⅵ)的理論飽和吸附量和吸附能力常數(shù)分別為16.16 mg/g和0.068 L/g。將脫墨污泥活性炭應(yīng)用于Fe (Ⅲ)的吸附,在最優(yōu)吸附條件:即活性炭含量7.5 g/L、Fe (Ⅲ)溶液濃度100 mg/L、吸附時間3 h、pH為2時,活性炭對Fe (Ⅲ)的去除率和吸附量分別為89.03%和11.87 mg/g;動力學(xué)實驗研究表明,脫墨污泥活性炭對Fe (Ⅲ)的理論飽和吸附量為40.87 mg/g,吸附能力常數(shù)為0.029 L/g,吸附性能優(yōu)良。將活性炭進(jìn)行改性處理,并應(yīng)用于Cr (Ⅵ)吸附,最佳改性條件為:改性劑為10mol/L的HN03、炭酸比1: 15 (m: V)、改性時間2.0h。當(dāng)改性活性炭用量為5 g/L時,其去除率和吸附量也分別達(dá)到83.89%和25.17 mg/g,吸附量與未改性活性炭相比提高了 140.30%。
[Abstract]:A large amount of deinking sludge will be produced in the process of regeneration and deinking of waste paper, which accounts for more than 65% of the pulp consumed in our country, so the output of deinking sludge is huge. Deinking sludge treatment has high cost, great difficulty and great harm to the environment, it is the main solid waste of waste paper regeneration. As a kind of high efficiency adsorption material, activated carbon has been widely used in many fields, such as water treatment, medicine, food and so on. Using deinking sludge as raw material to prepare activated carbon to realize high value utilization of waste is of profound economic and social significance to realize the harmless treatment of deinking sludge and to improve the added value of products, which is in line with the development mode of circular economy. Activated carbon was prepared from deinked sludge by phosphoric acid activation method and applied to the adsorption of simulated metal wastewater. The optimum preparation conditions of activated carbon were determined by orthogonal experiment and single factor experiment. The optimum conditions were as follows: activation temperature 450 鈩，

本文編號：2101169