Mohammad Rezvani Ghalhari, Daryoush Sanaei, Ramin Nabizadeh, Amir Hossein Mahvi
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引用次数: 1
摘要
一些由天然聚合物材料制成的吸附性水凝胶尚未满足高水平废水净化的需求。在本研究中，描述了一种生产天然纤维素基金属氧化物纳米颗粒水凝胶珠的新型环保工艺。合成了废纸衍生的纤维素纤维、金属氧化物纳米粒子和聚乙烯醇等可回收吸附剂组分，利用交联剂（Ca2+、硼酸和NaCl）合成了WCF/PVA-MO-NP水凝胶珠，并通过评估其从水溶液中去除酸性红18（AR18）的能力进行了分析。通过FESEM、XRD、EDX、BET和FTIR对WCF/PVA MO NP进行了表征。结果表明，分布在WCF三维纤维网络内外通道上的金属氧化物纳米颗粒具有强共价/非共价交联键，有利于质量扩散，增强AR18之间的相互作用。结果表明，在最佳条件下（[AR18]:10mg·L−1；[吸附剂]:0.55g·L−2；pH:3；时间46min），AR18的去除率超过87.62%，吸附量为88.65mg·g−1。结果表明，吸附动力学符合拟二阶模型（0.99），吸附等温线符合Langmuir等温线模型（0.99）
Cellulose-based hydrogel beads derived from wastepapers: application for organic dye adsorption
Some adsorbent hydrogels made of natural polymeric materials have not yet met the needs for a high level of wastewater purification. In the present study, a novel and environmentally friendly process is described for the production of natural cellulose-based metal oxide nanoparticle hydrogel beads. Recyclable adsorbent components include wastepaper-derived cellulose fiber, metal oxide nanoparticles and polyvinyl alcohol was synthesized, the WCF/PVA MO NP hydrogel beads were synthesized by using cross-linking agents (Ca2+, boric acid and NaCl), and were analyzed by evaluating their ability to remove the acid red 18 (AR18) from aqueous solution. The WCF/PVA MO NP was characterized by FESEM, XRD, EDX, BET, and FTIR. The results revealed that the metal oxide nanoparticles distributed on external and internal channels of the 3D fiber network of WCF with strongly covalent/non-covalent cross-linking bonds would facilitate mass diffusion and enhance the interaction between AR18. The results shown that more than 87.62% of AR18 was removed and adsorption capacity was 88.65 mg·g−1 under optimized conditions ([AR18]: 10 mg·L−1; [adsorbent]: 0.55 g·L−1; pH: 3; Time: 46 min). Results shown that the adsorption kinetics fit the pseudo-second-order model (0.99), and the adsorption isotherms fitted to Langmuir isotherm model (0.99).
期刊介绍：
Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.
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