Scholarlink

<p>In this study, a new Cellulose- Nano-Crystals (CNC) was developed from industrial cotton waste that was first treated by hydrolysis acid, then encapsulated in the form of gelled beads in an alginate gel containing Eggshells powders (CNC/Eg-A). The objective is to remove <i>Brilliant Cresyl</i>&#xa0;<i>Blue</i> (BCB) and/or <i>Titanium Yellow</i>&#xa0;(TY) dyes, first in simple monosolute systems then in (BCB/TY) binary mixtures. XRD analysis showed that the CNC and CNC/Eg-A samples have crystallinity indices (<i>X</i><sub><i>C</i></sub>) of about 73.18 and 33.96%, respectively. Scanning electron microscopy (SEM) clearly shows that the surface morphology of CNC/Eg-A matrix is smoother and more evenly distributed than that of CNC powder. It also shows a mixture of microporous and macroporous structures. In single monocomponent systems (Dye/CNC/Eg-A) and at an initial concentration of 20 mg L<sup>−1</sup>, maximum removal efficiencies of 96.4% for BCB and 60% for TY are obtained at pH 8 and 2, respectively. The results of the kinetic study, which fit perfectly with the PSO model, indicate that the interactions are chemical. The Langmuir model modelling of sorption results on CNC/Eg-A yielded maximum sorption capacities in the order of 103 mg g<sup>−1</sup> (BCB) and 66 mg g<sup>−1</sup> (TY). In binary systems (BCB/TY), the sorbed quantities decrease to 98 mg g<sup>−1</sup> for BCB and 44 mg g<sup>−1</sup> for TY and indicate competitive sorption by antagonistic effect. The corresponding selectivity values <i>S</i><sub><i>(BCB/TY)</i></sub> are of the order of 2.196 and 0.455 for BCB and TY dyes, respectively. These results therefore confirm that the CNC/Eg-A sorbent has a higher affinity for larger BCB than for smaller TY dye species. The obtained experimental sorption results were well predicted by the extended form of the Langmuir model which assumes a limited number of identical adsorption sites.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Competitive Sorption of (Brilliant Cresyl Blue/Titanium Yellow) Couple on New Porous Nanocrystals Based on Cellulosic Waste: Modeling and Comparative Study

  • 期刊论文

  • 发表日期：

    2025年6月21日

查看全文
  • Leila Chabane,
  • Omar Bouras

摘要

In this study, a new Cellulose- Nano-Crystals (CNC) was developed from industrial cotton waste that was first treated by hydrolysis acid, then encapsulated in the form of gelled beads in an alginate gel containing Eggshells powders (CNC/Eg-A). The objective is to remove Brilliant Cresyl Blue (BCB) and/or Titanium Yellow (TY) dyes, first in simple monosolute systems then in (BCB/TY) binary mixtures. XRD analysis showed that the CNC and CNC/Eg-A samples have crystallinity indices (XC) of about 73.18 and 33.96%, respectively. Scanning electron microscopy (SEM) clearly shows that the surface morphology of CNC/Eg-A matrix is smoother and more evenly distributed than that of CNC powder. It also shows a mixture of microporous and macroporous structures. In single monocomponent systems (Dye/CNC/Eg-A) and at an initial concentration of 20 mg L−1, maximum removal efficiencies of 96.4% for BCB and 60% for TY are obtained at pH 8 and 2, respectively. The results of the kinetic study, which fit perfectly with the PSO model, indicate that the interactions are chemical. The Langmuir model modelling of sorption results on CNC/Eg-A yielded maximum sorption capacities in the order of 103 mg g−1 (BCB) and 66 mg g−1 (TY). In binary systems (BCB/TY), the sorbed quantities decrease to 98 mg g−1 for BCB and 44 mg g−1 for TY and indicate competitive sorption by antagonistic effect. The corresponding selectivity values S(BCB/TY) are of the order of 2.196 and 0.455 for BCB and TY dyes, respectively. These results therefore confirm that the CNC/Eg-A sorbent has a higher affinity for larger BCB than for smaller TY dye species. The obtained experimental sorption results were well predicted by the extended form of the Langmuir model which assumes a limited number of identical adsorption sites.