Polymeric Nanocomposite Adsorbent of Cross-linked Chitosan-adipic Acid and SnO2 Nanoparticles for Adsorption of Methyl Orange Dye: Isotherms, Kinetics, and Response Surface Methodology

IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL
Ahmed Saud Abdulhameed, Rima Heider Al Omari, Al Omari, Samaa Abdullah, Alaa A. Al-Masud, Mahmoud Abualhaija, Sameer Algburi
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Abstract

In the present work, a polymeric nanocomposite adsorbent of cross-linked chitosan-adipic acid and SnO2 nanoparticles (CS-ADP/SnO2) was created for the adsorption of methyl orange (MO) dye from water. Response surface methodology (RSM) was used to examine how three factors affected the adsorption of the dye MO: time C (10–40 min), pH (4–10), and CS-ADP/SnO2 dosage (0.02–0.08 g/L). The CS-ADP/SnO2 nanocomposite has a BET surface area of 28.64 m2/g, a total pore volume of 0.0271 cm3/g, and a mean pore diameter of 3.79 nm. The several XRD diffraction peaks and average crystallite size of 31.33 nm of the CS-ADP/SnO2 nanocomposite indicate that it primarily possesses polycrystalline properties. The MO adsorption by CS-ADP/SnO2 could be well described by the isotherm model, which was validated by the adsorption kinetics and Freundlich and pseudo-first-order kinetic models. The best circumstances for maximum MO elimination (80.54%) were found to be a pH of 4, a CS-ADP/SnO2 dosage of 0.055 g/L, and a contact period of 40 min, according to the results of the BBD model. At 25 oC, the maximal adsorption capacity of the CS-ADP/SnO2 nanocomposite toward the MO dye was 344.91 mg/g. The Yoshida H-bonding, electrostatic interaction, hydrogen bonding, and n-π stacking interaction, were postulated as the mechanisms for MO dye adsorption onto CS-ADP/SnO2 nanocomposite. In summary, this research suggests that the composite has the ability to effectively remove organic dyes from water systems, making it a promising new adsorbent.

Abstract Image

交联壳聚糖-己二酸和SnO2纳米颗粒的聚合物纳米复合吸附剂对甲基橙染料的吸附:等温线、动力学和响应面方法
本文制备了一种交联壳聚糖-己二酸与SnO2纳米颗粒的聚合物纳米复合吸附剂(CS-ADP/SnO2),用于吸附水中的甲基橙(MO)染料。采用响应面法(RSM)考察了时间C (10 ~ 40 min)、pH(4 ~ 10)和CS-ADP/SnO2用量(0.02 ~ 0.08 g/L)对MO染料吸附的影响。CS-ADP/SnO2纳米复合材料的BET比表面积为28.64 m2/g,总孔体积为0.0271 cm3/g,平均孔径为3.79 nm。CS-ADP/SnO2纳米复合材料的几个XRD衍射峰和平均晶粒尺寸为31.33 nm,表明其主要具有多晶性质。CS-ADP/SnO2对MO的吸附可以用等温线模型很好地描述,吸附动力学和Freundlich及拟一级动力学模型验证了这一模型。根据BBD模型的结果,发现pH = 4、CS-ADP/SnO2投加量为0.055 g/L、接触时间为40 min时MO消除效果最佳(80.54%)。在25℃时,CS-ADP/SnO2纳米复合材料对MO染料的最大吸附量为344.91 mg/g。假设吉田氢键、静电相互作用、氢键和n-π堆叠相互作用是MO染料在CS-ADP/SnO2纳米复合材料上吸附的机理。综上所述,本研究表明该复合材料具有有效去除水中有机染料的能力,是一种很有前途的新型吸附剂。
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来源期刊
Journal of Polymers and the Environment
Journal of Polymers and the Environment 工程技术-高分子科学
CiteScore
9.50
自引率
7.50%
发文量
297
审稿时长
9 months
期刊介绍: The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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