Nanoarchitectonics for High Adsorption Capacity Carboxymethyl Cellulose Nanofibrils-Based Adsorbents for Efficient Cu2+ Removal

• DOI: 10.3390/nano12010160
• Publication Date: 2022-01-10T01:21:56Z
• Authors: Rongrong Si; Yehong Chen; Daiqi Wang; Dongmei Yu; Qijun Ding; Ronggang Li; Chaojun Wu
• Keywords: Glutaraldehyde; Carboxymethyl cellulose; Langmuir adsorption model; Sodium hydroxide

In the present study, carboxymethyl cellulose nanofibrils (CMCNFs) with different carboxyl content (0.99–2.01 mmol/g) were prepared via controlling ratio of monochloroacetic acid (MCA) and sodium hydroxide to Eucalyptus bleached pulp (EBP). CMCFs-PEI aerogels obtained using crosslinking reaction polyethyleneimine (PEI) CMCNFs aid glutaraldehyde (GA). The effects pH, contact time, temperature, initial Cu2+ concentration on removal performance CMCNFs-PEI was highlighted. Experimental data showed that maximum adsorption capacity CMCNF30-PEI for 380.03 ± 23 mg/g, results consistent Langmuir isotherm (R2 > 0.99). theoretical 616.48 mg/g. After being treated 0.05 M EDTA solution, aerogel retained an 85% after three adsorption–desorption cycles. X-ray photoelectron spectroscopy (XPS) demonstrated complexation main mechanism. excellent provided another avenue utilization in wastewater treatment field.