Flexible brushite/nanofibrillated cellulose aerogels for efficient and selective removal of copper(II)

Wang，Qinyu1; Zuo，Wei1; Tian，Yu1; Kong，Lingchao2; Cai，Guiyuan1; Zhang，Haoran1; Li，Lipin1; Zhang，Jun1

2022-12-15

10.1016/j.cej.2022.138262

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

1873-3212

To achieve efficient removal of copper(II) from heavy metal wastewater, designing an eco-friendly and low-cost adsorbent is highly desirable. Here, a novel air- and underwater shape-memory cellulose aerogel was reported via coupling brushite and polyethyleneimine (PEI)-modified nanofibrillated cellulose (NFC) for selectively adsorbing Cu(II) ions. The adsorption kinetic and isotherm studies were consistent with pseudo-second-order model and Langmuir model, indicating the removal of Cu(II) was a monolayer chemisorption process. Benefiting from the open three-dimensional (3D) framework structure and abundant exposed active sites, such compressible aerogel exhibited excellent adsorption capacity of 332.66 mg/g for Cu(II). In addition, the developed aerogel could be conveniently used as a continuous flow filter for successive purification of industrial wastewater, where the up-to-standard treatment volume was about 5.6 L. The Cu(II)-loaded aerogel could be regenerated after being eluted by 0.1 M EDTA-2Na, and its structure, shapeability and selective adsorption properties were hardly affected even after 8 consecutive cycles. Mechanistic analysis confirmed that the surface complexation, ion exchange and chemical deposition were the main driving forces for the superior adsorption performance. Finally, PNFCA/BRU could inhibit the contamination of crops by heavy metals, which was a great safeguard for wheat growth.

Adsorption mechanism Brushite Compressible Functional groups Heavy metal ions Nanocellulose aerogel

EI ; SCI

English

Others

Booz Allen Foundation[41877396];Booz Allen Foundation[QA202129];Booz Allen Foundation[YQ2021E029];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000888190500007

ELSEVIER SCIENCE SA

20223012419821

Adsorption ; Aerogels ; Chemical analysis ; Chemicals removal (water treatment) ; Copper compounds ; Industrial water treatment ; Ion exchange ; Metal ions ; Monolayers ; Nanocellulose ; Wastewater treatment

Water Treatment Techniques for Industrial Use:445.1.2 ; Industrial Wastes:452.3 ; Industrial Wastes Treatment and Disposal:452.4 ; Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Colloid Chemistry:801.3 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Cellulose, Lignin and Derivatives:811.3 ; Organic Polymers:815.1.1

ENGINEERING

2-s2.0-85134795189

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,Zuo，Wei,Tian，Yu,et al. Flexible brushite/nanofibrillated cellulose aerogels for efficient and selective removal of copper(II)[J]. CHEMICAL ENGINEERING JOURNAL,2022,450.

Wang，Qinyu.,Zuo，Wei.,Tian，Yu.,Kong，Lingchao.,Cai，Guiyuan.,...&Zhang，Jun.(2022).Flexible brushite/nanofibrillated cellulose aerogels for efficient and selective removal of copper(II).CHEMICAL ENGINEERING JOURNAL,450.

Wang，Qinyu,et al."Flexible brushite/nanofibrillated cellulose aerogels for efficient and selective removal of copper(II)".CHEMICAL ENGINEERING JOURNAL 450(2022).