期刊论文

Beaded Active Carbon Modified by Alkali and Copper and Its Toluene Adsorption Mechanism

中文

环境科学研究

1001-6929

2021

34

11

2665-2673

10.13198/j.issn.1001-6929.2021.06.25

No.2016YFD0800202:国家重点研发计划 2017YFD0800700:国家重点研发计划

本校为第一机构

为了提高活性炭吸附材料对非极性污染物的吸附性能,采用碱〔(NaOH溶液)联合铜(Cu(CH3COO) 2溶液〕对珠状活性炭(beaded active carbon,BAC)进行改性,利用BET、SEM、Boehm滴定和FT-IR对改性前后的活性炭进行表征,并采用动态吸附法和Yoon-Nelson吸附理论模型研究了不同改性方法对活性炭吸附甲苯穿透曲线、饱和吸附量的影响及吸附机理.结果表明:改性后BAC表面不规则的孔隙增多,比表面积和微孔容积减少,平均孔径变化不显著,表面Cu含量明显升高;不同浓度碱铜联合改性后BAC对甲苯的吸附性能均提高,当NaOH溶液浓度为8 mol/L、Cu(CH3COO) 2溶液质量分数为0.5%时,联合改性效果最好,此时改性后BAC对甲苯的...

Alkali (NaOH) -copper (Cu(CH3COO) 2) modified beaded active carbons (BACs) were developed to improve the adsorption capacity of BACs for non-polar pollutants. BET,SEM,Boehm titration and FT-IR analyses determined that the alkali-copper BACs had abundant irregular pore structure,small surface area and micropore volume,and high Cu loading on its surface. The surface characteristics enhanced the adsorption of toluene,which reached a peak under the conditions of the 8 mol/L NaOH solution and 0.5% of Cu(CH3COO) 2 solution,indicating that the modification of BACs with high concentration NaOH solutio...