Fabrication of chitosan-alginate-polyvinylpyrrolidone for efficient removal of Cr(VI) from wastewater in experiment and adsorption mechanism

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-07-27 DOI:10.1007/s10450-024-00521-3

Amru Daulay, David Candra Birawidha, Singgih Prabowo, Evi Dwi Yanti, Lukman Hakim Nasution, Yassaroh Yassaroh, Lukmanul Hakim Samada

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Abstract

This study synthesized chitosan-alginate-polyvinylpyrrolidone and applied it for Cr(VI) removal. Characterization was carried out using FTIR, TGA, N₂ adsorption, ¹H NMR, and FE-SEM. FTIR spectra show peaks at 1415 cm^− 1, 1323 cm^− 1, 1029 cm^− 1, and 448 cm^− 1, which are COO, C-N, C-O, and N-C = O groups. The surface area of CsAgPVP was 20.42 m²/g. The pore size of CsAgPVP was 5.36 nm. Field emission shows the C, O, N, and Na. The optimum conditions CsAgPVP dor adsorption Cr(VI) were 50 ppm, 360 min, and pH 4. It uses adsorption isotherm and kinetic to show the Langmuir model and pseudo-second-order. The CsAgPVP adsorption process is assumed homogeneous and considered as chemisorption. Adsorption capacity shows 208.67 mg/g. It uses a regeneration study of removal percentage up to 90% in the fourth cycle. The removal percentage in real sample mine wastewater and waste acid laboratories was 80% and 72%.

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壳聚糖-海藻酸盐-聚乙烯吡咯烷酮高效去除废水中六价铬的制备与吸附机理实验

本研究合成了壳聚糖-精氨酸聚乙烯吡咯烷酮，并将其用于去除六价铬。利用傅立叶变换红外光谱、热重分析、N2 吸附、1H NMR 和 FE-SEM 进行了表征。傅立叶变换红外光谱在 1415 cm- 1、1323 cm- 1、1029 cm- 1 和 448 cm- 1 处显示出峰值，分别为 COO、C-N、C-O 和 N-C = O 基团。CsAgPVP 的表面积为 20.42 平方米/克。CsAgPVP 的孔径为 5.36 nm。场发射显示出 C、O、N 和 Na。CsAgPVP 对 Cr(VI) 的最佳吸附条件为 50 ppm、360 min、pH 值为 4，并利用吸附等温线和动力学显示了 Langmuir 模型和伪秒阶。假定 CsAgPVP 吸附过程是均匀的，并将其视为化学吸附。吸附容量为 208.67 mg/g。通过再生研究，第四个循环的去除率可达 90%。矿山废水和废酸实验室实际样品的去除率分别为 80% 和 72%。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.