Adsorption behavior of amine-modified cotton stalk extract on Congo red in aqueous solution

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2025-02-01 Epub Date: 2024-12-19 DOI:10.1016/j.reactfunctpolym.2024.106137

Zheng Zhang , Chengbo Zhang , Gang Liu , Daning Lang , Lu Wang , Chao Yang , Jihong Fu , Ronglan Wu , Wei Wang

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Abstract

Selective adsorbent materials for the remediation of printing and dyeing wastewater were successfully prepared from cotton stalks by sodium chlorite pretreatment and vinylamine modification. Its dye adsorption test showed that the cotton stalk-based adsorbent had a unique selective adsorption capacity for Congo red, and the maximum adsorption amount could reach 997.1 mg/g. It is worth noting that the environmental factors, such as pH value, salt ion concentration, and surfactant, had a small influence on the process. Exploring the adsorption mechanism, it was found that the process conformed to the quasi-secondary kinetic model (R² > 0.99) and the Langmuir isotherm model (R² > 0.99), in which electrostatic interactions, π-π, and hydrogen bonding played important roles in the adsorption process. Therefore, this environmentally friendly and efficient adsorbent has a broad application prospect in wastewater treatment.

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胺改性棉秆提取物对刚果红的吸附行为

以棉杆为原料，经亚氯酸钠预处理和乙烯胺改性，成功制备了印染废水选择性吸附材料。染料吸附试验表明，棉杆基吸附剂对刚果红具有独特的选择性吸附能力，最大吸附量可达997.1 mg/g。值得注意的是，pH值、盐离子浓度、表面活性剂等环境因素对工艺影响较小。探索吸附机理，发现吸附过程符合准二次动力学模型(R2 >；0.99)和Langmuir等温线模型(R2 >；0.99)，其中静电相互作用、π-π和氢键在吸附过程中起重要作用。因此，这种环保高效的吸附剂在废水处理中具有广阔的应用前景。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.