Compressible amino-modified carboxymethyl chitosan aerogel for efficient Cu(II) adsorption from wastewater

Wang，Qinyu1; Li，Lipin1; Kong，Lingchao2; Cai，Guiyuan1; Wang，Pu1; Zhang，Jun1; Zuo，Wei1; Tian，Yu1

2022-07-15

10.1016/j.seppur.2022.121146

SEPARATION AND PURIFICATION TECHNOLOGY   影响因子和分区

1383-5866

1873-3794

Copper ions (Cu(II)) in water pose a huge threat to human health and ecosystem security. Therefore, developing eco-friendly and sustainable strategies to eliminate the toxicity risk of Cu(II) in the aqueous environment remains a great challenge. In this work, an elastic polyethyleneimine-modified carboxymethyl chitosan aerogel was developed via a freeze-drying process for the adsorption of Cu(II). The adsorption kinetic and isotherm experiments demonstrated that the adsorption process was monolayer chemisorption and the maximum adsorption capacity calculated from Langmuir model was 175.56 mg g. The obtained aerogels exhibited preferential selectivity for Cu(II) even when the competing cations and organics existed. Besides, about 0.93 g of aerogel realized continuous fixed-bed column filtration of industrial wastewater with an effective purification volume of 4.14 L. Mechanistic analysis via FTIR and XPS revealed that the excellent adsorption performance for Cu(II) might be attributed to the strong electrostatic force, Vander Waals' force and coordination of N/O -containing functional groups. It is worth mentioning that the adsorbed Cu(II) ions in the aerogel were converted into a reusable photocatalyst, avoiding the secondary leakage of heavy metals. This work opened a door to synthesize carboxymethyl chitosan aerogel, promising for heavy metal wastewater treatment and realizing the concept of waste utilization.

Adsorbent recycle Adsorption Carboxymethyl chitosan aerogel Functional groups Heavy metal ions

SCI ; EI

英语

ESI高被引

其他

National Key Laboratory of Human Factors Engineering[2019YFD1100300];National Natural Science Foundation of China[41877396];National Natural Science Foundation of China[52100037];National Natural Science Foundation of China[52170028];Open Society Foundations[QA202129];Natural Science Foundation of Heilongjiang Province[YQ2021E029];

Engineering

Engineering, Chemical

WOS:000796644000004

ELSEVIER

20221812061151

Aerogels ; Chitosan ; Copper compounds ; Health risks ; Heavy metals ; Metal ions ; Monolayers ; Wastewater treatment

Industrial Wastes Treatment and Disposal:452.4 ; Health Care:461.7 ; Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Colloid Chemistry:801.3 ; Chemical Operations:802.3 ; Organic Compounds:804.1

CHEMISTRY

2-s2.0-85129159533

Scopus

1.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE),School of Environment,Harbin Institute of Technology,Harbin,150090,China
2.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China

Wang，Qinyu,Li，Lipin,Kong，Lingchao,et al. Compressible amino-modified carboxymethyl chitosan aerogel for efficient Cu(II) adsorption from wastewater[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,293.

Wang，Qinyu.,Li，Lipin.,Kong，Lingchao.,Cai，Guiyuan.,Wang，Pu.,...&Tian，Yu.(2022).Compressible amino-modified carboxymethyl chitosan aerogel for efficient Cu(II) adsorption from wastewater.SEPARATION AND PURIFICATION TECHNOLOGY,293.

Wang，Qinyu,et al."Compressible amino-modified carboxymethyl chitosan aerogel for efficient Cu(II) adsorption from wastewater".SEPARATION AND PURIFICATION TECHNOLOGY 293(2022).