Modulation of hybrid CaCO3 by biosurfactant for enhanced Cu2+ removal from aqueous solution

IF 6.6 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2026-03-01 Epub Date: 2026-02-19 DOI:10.1016/j.jwpe.2026.109754

Tingting Zhang , Changxiong Zou , Menchuan Yuan , Zhuangzhuang Yang , Jianhong Han , Qingkai Hu , Weida Wang , Zhe Liu

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Abstract

The persistence of heavy metals in aquatic environments has attracted increasing attention, highlighting the urgent need for rapid and efficient treatment technologies for heavy metal-contaminated waters. This study rapidly synthesized calcium carbonate (CaCO₃) under the Biosurfactant for the remval of Cu²⁺ from aqueous solutions. The results indicated that CaCO₃ synthesized without biosurfactants or under rhamnolipid regulation consisted exclusively of calcite. CaCO₃ under the regulation of sophorolipid was predominantly composed of calcite and vaterite, with vaterite content increasing as sophorolipid concentration rose. At a CaCO₃ dosage of 1.0 g/L, the Cu²⁺ removal efficiency in the control - group was 71.62%, while the rhamnolipid and sophorolipid groups achieved higher removal efficiencies of 76.96% and 80.39%, respectively. The observation that the Cu²⁺ removal-to-Ca²⁺ increase ratio exceeded 1 in both the rhamnolipid and sophorolipid groups, together with adsorption kinetic fitting results, indicates that Cu²⁺ removal is governed by a synergistic mechanism involving chemical precipitation and surface adsorption. The X-ray photoelectron spectroscopy (XPS) spectra further confirms the occurrence of surface adsorption, and the detection of Cu₄ (NO₃)₂(OH)₆ in X-ray diffraction (XRD) patterns indicates that Cu²⁺ was partially removed through chemical precipitation. This study demonstrated that biosurfactant-regulated CaCO₃ exhibits superior Cu²⁺ removal performance, providing theoretical insights and technical support for the rational design of heavy metal adsorbents.

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生物表面活性剂对杂化CaCO3的调控，以促进水溶液中Cu2+的去除

重金属在水生环境中的持久性日益引起人们的关注，迫切需要快速有效的重金属污染水体处理技术。本研究在生物表面活性剂的作用下快速合成碳酸钙（CaCO3），用于去除水溶液中的Cu2+。结果表明，在没有生物表面活性剂或鼠李糖脂调控下合成的CaCO3完全由方解石组成。在槐脂调控下的CaCO3主要由方解石和水晶石组成，水晶石含量随着槐脂浓度的升高而增加。在CaCO3投加量为1.0 g/L时，对照组的Cu2+去除率为71.62%，鼠李糖脂组和槐果脂组的Cu2+去除率分别为76.96%和80.39%。观察到鼠李糖脂和槐脂基团对Cu2+的去除率与ca2 +的增加比均大于1，以及吸附动力学拟合结果表明，Cu2+的去除是由化学沉淀和表面吸附的协同机制控制的。x射线光电子能谱（XPS）进一步证实了表面吸附的发生，x射线衍射（XRD）图中Cu4 (NO3)2(OH)6的检测表明Cu2+通过化学沉淀被部分去除。研究结果表明，生物表面活性剂调控的CaCO3具有优异的Cu2+去除性能，为重金属吸附剂的合理设计提供了理论见解和技术支持。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies