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Nanoarchitectonics for High Adsorption Capacity Carboxymethyl Cellulose Nanofibrils-Based Adsorbents for Efficient $Cu^{2+}$ Removal
| Content Provider | MDPI |
|---|---|
| Author | Si, Rongrong Chen, Yehong Wang, Daiqi Yu, Dongmei Ding, Qijun Li, Ronggang Wu, Chaojun |
| Copyright Year | 2022 |
| Description | In the present study, carboxymethyl cellulose nanofibrils (CMCNFs) with different carboxyl content (0.99–2.01 mmol/g) were prepared via controlling the ratio of monochloroacetic acid (MCA) and sodium hydroxide to Eucalyptus bleached pulp (EBP). CMCFs-PEI aerogels were obtained using the crosslinking reaction of polyethyleneimine (PEI) and CMCNFs with the aid of glutaraldehyde (GA). The effects of pH, contact time, temperature, and initial $Cu^{2+}$ concentration on the $Cu^{2+}$ removal performance of CMCNFs-PEI aerogels was highlighted. Experimental data showed that the maximum adsorption capacity of CMCNF30-PEI for $Cu^{2+}$ was 380.03 ± 23 mg/g, and the adsorption results were consistent with Langmuir isotherm $(R^{2}$ > 0.99). The theoretical maximum adsorption capacity was 616.48 mg/g. After being treated with 0.05 M EDTA solution, the aerogel retained an 85% removal performance after three adsorption–desorption cycles. X-ray photoelectron spectroscopy (XPS) results demonstrated that complexation was the main $Cu^{2+}$ adsorption mechanism. The excellent $Cu^{2+}$ adsorption capacity of CMCNFs-PEI aerogels provided another avenue for the utilization of cellulose nanofibrils in the wastewater treatment field. |
| Starting Page | 160 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12010160 |
| Journal | Nanomaterials |
| Issue Number | 1 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-03 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Paper and Wood Carboxymethylation Cellulose Nanofibrils Aerogel Adsorption |
| Content Type | Text |
| Resource Type | Article |
