Lead removal from water using carboxycellulose nanofibers prepared by nitro-oxidation method
Abstract
Carboxycellulose nanofibers were extracted from untreated jute using a simple nitro-oxidation method based on nitric acid/sodium nitrite. The characteristics of nitro-oxidized carboxycellulose nanofibers (NOCNF) with low crystallinity (35%), high carboxylate content (1.15 mmol/g) and high surface charge (− 70 mV) made them an excellent substrate for Pb(II) ion removal from water. For example, a low concentration of NOCNF suspension (0.23 wt%) could remove a wide range of Pb(II) ions ranging from 50 to 5000 ppm in a short time-interval (< 5 min) at room temperature and pH ~ 7, where the adsorption efficiency of NOCNF was found to be 2270 mg/g based on the Langmuir isotherm analysis. The high removal efficiency of NOCNF was due to the combined effects of adsorption (dominated at Pb(II) concentration ≤ 1000 ppm) and mineralization of lead hydroxide (Pb(OH)2) crystals at high Pb(II) concentration (> 1000 ppm). Evidence of nanoscale lead hydroxide crystallization, induced by the lead(II)-NOCNF aggregated scaffold, was confirmed by FTIR, UV–visible spectroscopy, SEM/EDS, WAXD and TEM measurements.
Publisher URL: https://link.springer.com/article/10.1007/s10570-018-1659-9
DOI: 10.1007/s10570-018-1659-9
Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.
Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.