Biosorption of Cr(VI) Using Cellulose Nanocrystals Isolated from the Waterless Pulping of Waste Cotton Cloths with Su-Percritical CO2: Isothermal, Kinetics, and Thermodynamics Studies

Siti Hajar Mohamed, Md Sohrab Hossain, Mohamad Haafiz Mohamad Kassim, Venugopal Balakrishnan, Mohamed A. Habila, Azham Zulkharnain, Muzafar Zulkifli, Ahmad Naim Ahmad Yahaya

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In the present study, supercritical carbon dioxide (scCO2 ) was utilized as a waterless pulping for the isolation of cellulose nanocrystals (CNCs) from waste cotton cloths (WCCs). The isolation of CNCs from the scCO2-treated WCCs’ fiber was carried out using sulphuric acid hydrolysis. The morphological and physicochemical properties analyses showed that the CNCs isolated from the WCCs had a rod-like structure, porous surface, were crystalline, and had a length of 100.03 ± 1.15 nm and a width of 7.92 ± 0.53 nm. Moreover, CNCs isolated from WCCs had a large specific surface area and a negative surface area with uniform nano-size particles. The CNCs isolated from WCCs were utilized as an adsorbent for the hexavalent chromium [Cr(VI)] removal from aqueous solution with varying parameters, such as treatment time, adsorbent doses, pH, and temperature. It was found that the CNCs isolated from the WCCs were a bio-sorbent for the Cr(VI) removal. The maximum Cr(VI) removal was determined to be 96.97% at pH 2, 1.5 g/L of adsorbent doses, the temperature of 60 C, and the treatment time of 30 min. The adsorption behavior of CNCs for Cr(VI) removal was determined using isothermal, kinetics, and thermodynamics properties analyses. The findings of the present study revealed that CNCs isolated from the WCCs could be utilized as a bio-sorbent for Cr(VI) removal.

本文言語English
論文番号887
ジャーナルPolymers
14
5
DOI
出版ステータスPublished - 2022 3月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • ポリマーおよびプラスチック

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