碳酸钙复合材料的制备及其对Fe的吸附研究

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关键词：多巴胺；海藻酸钠；碳酸钙；Fe吸附 中图分类号：TS727 文献标识码：A DOI：10. 11980/j. issn.0254-508X.2026.04.023

Preparation of Calcium Carbonate Composite Materials and Their Adsorption of Fe3+

JIAO Xinye JIANG Xue*TIAN Xiuzhi DU Yichun XIAO Jiale XIANG Zhong LI Yuhang （ColegefoldelsniUstfiir （*E-mail： jiangx@sust.edu.cn）

Abstract：Thisstudyimedtoinvestigatetheinfluence mechanismsofdopamine（DA）andsodiumalginate （SA）asregulatingagentsonte structure of calcium carbonate composites and their adsorption performance for F e3+ . By adjusting the concentrations of DA and SA，the regulatoryefectsostalasecrosuurendprticleistrbuifcboteesteatialleddd sorptionperforanceandcylinabiltoftetoompositeforFewerecompard.Thesultsshowedtatthedsoptionbavioof DA- CaCO3 conformedtotheFreundlichisotheraladsorptionodelindicatingitsheterogeneoussufaceandadsorptiondominatedbymultilayer physisorption and weak chemical interactions with I . In contrast，SA-CaCO3better followed the Langmuir isothermal adsorption model，sugestingielyfoceitesdoaesotiprocssdoatedlaiitheicald sorption capacity of 515.36mg/g .Cycling experiments further showed that SA-CaCO maintained a removal rate above 8O% towards F e3+ after 3

5 times of adsorption-desorption cycles， demonstrating a good regeneration stability.

Key words：dopamine；sodium alginate；calcium carbonate; Fe3+ adsorption

水生系统中的金属离子污染已成为21世纪的关键环境问题，其中铁离子（ Fe3+ ）尤为普遍。（剩余15902字）