Journal of water process engineering最新文献

{"title":"Enhanced volatile fatty acids production from kitchen waste by peroxyacetic acid pretreatment: Insights into organic solubilization and microbial community succession","authors":"Huikun Yan ,&nbsp;Hui Li ,&nbsp;Wanqing Wang ,&nbsp;Zhenhua Wang ,&nbsp;Zhuangzhuang Xiang ,&nbsp;Jie Bai ,&nbsp;Hongyang Wang ,&nbsp;Xiao Huang","doi":"10.1016/j.jwpe.2026.109574","DOIUrl":"10.1016/j.jwpe.2026.109574","url":null,"abstract":"<div><div>The efficient solubilization of organic substrates through cell membrane and extracellular polymeric substances (EPS) disruption remains a critical challenge in volatile fatty acids (VFAs) production from kitchen waste (KW). This study systematically investigated an advanced Peroxyacetic acid (PAA) oxidation pretreatment to overcome this limitation, achieving both enhanced VFAs yield and selective acetate enrichment. The optimized PAA dosage (50 mg/g TSS) demonstrated remarkable performance, increasing total VFAs production from 4818 to 24,338 mg COD/L (a 405% improvement), with acetate constituting 98.64% of total VFAs. Comprehensive mechanistic analysis revealed that PAA pretreatment effectively degraded EPS and enhanced cell lysis, releasing substantial soluble organic matter. After 24-h treatment with 50 mg/g TSS, protein and polysaccharide concentrations reached 5107 mg/L and 12,804 mg/L, respectively, representing 3.2-fold and 2.9-fold increases compared to the control group. This significantly improved substrate availability for subsequent hydrolysis and acidogenesis processes. Microbial community analysis revealed that PAA pretreatment significantly enriched hydrolytic and acidogenic bacterial consortia (e.g., Comamonas and Acinetobacter) while enhancing the activities of key metabolic enzymes, including phosphofructokinase (glycolysis), L-lactate dehydrogenase, and acetate kinase. The pronounced acetate kinase activity elevation mechanistically explained the observed acetate dominance. These findings demonstrate a potentially practical technology for targeted acetate production from waste kitchen materials, offering new possibilities for sustainable resource recovery.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109574"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic degradation of naphtol blue black using CuO/g-C3N4 composite with persulphate: Optimization of the process by response surface methodology","authors":"Jean Marie Dikdim Dangwang ,&nbsp;Nasser Oudou ,&nbsp;Sadou Dalhatou ,&nbsp;Sali Mouhamadou ,&nbsp;Christophe Caperaa ,&nbsp;Abdoulaye Kane ,&nbsp;Pierre Bonet ,&nbsp;Guy Bertrand Noumi ,&nbsp;Xu Zhao","doi":"10.1016/j.jwpe.2026.109576","DOIUrl":"10.1016/j.jwpe.2026.109576","url":null,"abstract":"<div><div>CuO/g-C₃N₄ photocatalysts were prepared using a simple technique and applied for the degradation of naphtol blue black (NBB) in an aqueous medium. The characteristics of materials were examined to determine functional groups, crystalline structure, elemental composition, morphology, and band gap energy. The findings confirmed the effective formation of the CuO/g-C₃N₄ hybrid nanomaterials, which were tested for photocatalytic experiments under several operating conditions. The results revealed that the highest degradation efficiency of 99.05% was achieved under UV/0.2CuO/g-C₃N₄/PS system after 30 min, with the corresponding highest reaction rate constant <em>k</em> = 0.135 min⁻¹. The enhancement of NBB photodegradation was attributed to the involvement of persulphate (PS) in the inhibition of photocharge carriers. The study of the NBB degradation process through Box-Behnken Design indicated that the irradiation time was the variable exerting the dominant influence during the treatment. The optimal conditions for NBB degradation were 27.75 min, 85.75 mg, and 25 mg for irradiation time, PS mass and catalyst quantity, respectively. The degradation efficiency obtained under these conditions was 95.74 ± 0.12%. The development of CuO/g-C₃N₄ type heterostructure combined with PS for photocatalytic degradation offers a new direction to address the challenges encountered during purification of wastewater containing dyes.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109576"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing Pond-In-Pond wastewater treatment systems: The impact of pit placement on hydrodynamics and efficiency","authors":"Amanda Avozani ,&nbsp;Clifford B. Fedler ,&nbsp;Luís Carlos Soares da Silva Júnior","doi":"10.1016/j.jwpe.2026.109597","DOIUrl":"10.1016/j.jwpe.2026.109597","url":null,"abstract":"<div><div>The Pond-in-Pond (PIP) system offers a sustainable, low-cost wastewater treatment solution for small communities with limited infrastructure. This study evaluated the hydrodynamic performance of three PIP configurations using Computational Fluid Dynamics (CFD) modeling. The three configurations were compared by varying the internal pit, the inlet location, and position in the PIP. These configurations were compared to a conventional pond (CP), as a reference. The hydraulic behavior, strongly influenced by internal geometry, was assessed through velocity distribution and tracer transport analysis. All PIP configurations exhibited longer hydraulic retention time and reduced short-circuiting compared with the reference system. The PIP 2.3, configuration with the inlet pit located farthest from the outlet, achieved the highest hydraulic efficiency, with a 70% increase over the CP. The PIP 2.2, which features an internal pit adjacent to the pond wall, showed the lowest cross-sectional velocity coefficient of variation (CV = 0.21). These results showed that the PIP 2.2 and PIP 2.3 demonstrated consistent hydrodynamic behavior, characterized by stable and uniform flow regimes. In terms of design of retrofitting existing ponds, adding a pit at the furthest point from the outlet (PIP 2.2) or as an external pit (PIP 2.3) resulted in hydraulic efficiency gains of 33% and 70%, respectively. These findings support the use of simple geometric modifications to enhance hydraulic performance without increasing operational complexity or energy demand.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109597"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separation of selected pharmaceuticals using commercially available nanofiltration membranes – Analysis of the influence of process parameters","authors":"Obinna Anike,&nbsp;Jiří Cuhorka,&nbsp;Petr Mikulášek","doi":"10.1016/j.jwpe.2026.109488","DOIUrl":"10.1016/j.jwpe.2026.109488","url":null,"abstract":"<div><div>The persistence of pharmaceutical residues in our water bodies is becoming worrisome due to its potential health hazards and ecological challenges, hence necessitating the need for advance treatment technologies. Despite the growing interest in membrane filtration, comprehensive evaluations using real-world conditions remain scarce. With focus on rejection efficiency, membrane selectivity and optimisation of process parameters for Atenolol (ATN), Metformin (MET) and Norfloxacin (NFX), our study investigated the effectiveness of polyamide thin-film composite nanofiltration membranes (AFC 30 and AFC 40) in treating synthetic wastewater mimicking real life conditions. We utilised a Box-Behnken experimental design (BDD) and feed concentration as low as 250 μg L^-1 to examine the impact of pH, transmembrane pressure, flowrate and membrane type on pharmaceutical rejection and permeate flux. Models that were based on Response Surface Methodology (RSM) were able to accurately predict results with 95% accuracy. Under optimized conditions, AFC 30, a denser membrane, showcased superior rejection efficiencies of 97.33 ± 0.01% (NFX), 94.55 ± 0.01% (ATN), and 69.54 ± 0.01% (MET), with corresponding flux rates of 91.02 ± 0.95 L m⁻² h⁻¹, 96.42 ± 0.91 L m⁻² h⁻¹, and 85.87 ± 0.28 L m⁻² h⁻¹, respectively. Conversely, AFC 40 demonstrated superior performance in high throughput separation and proved to be a looser membrane with fluxes recorded as 163.05 ± 0.29 L m⁻² h⁻¹, 156.78 ± 0.46 L m⁻² h⁻¹, 169.56 ± 0.17 L m⁻² h⁻¹ for ATN, MET and NFX respectively at a pH of 7, 30 bar, 27.5 °C and 10 Lmin⁻¹. In contrast to other studies, this study uses the Spiegler-Kedem model (SKM) to clarify solute transport mechanism, and the result shows a good correlation between the theoretical and experimental rejection with a deviation of about 5%. This results demonstrate the crucial significance of membrane characteristics, operating conditions and nature of pharmaceutical on pharmaceutical removal, providing valuable insights for improving the process.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109488"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cu2S-ZnS PANI nanocomposite adsorbent for the removal of lead ion from water samples","authors":"Lamees Bassim Hussien ,&nbsp;Emad M. Al-Kinani ,&nbsp;W.M. Hamud ,&nbsp;Mohammad Eftekhari ,&nbsp;Hasanali Moradi ,&nbsp;Mohammad Gheibi","doi":"10.1016/j.jwpe.2026.109501","DOIUrl":"10.1016/j.jwpe.2026.109501","url":null,"abstract":"<div><div>In this study, copper(I) sulfide‑zinc(II) sulfide (Cu₂S-ZnS) nanoparticles were synthesized via a one-step hydrothermal method using zinc acetate, copper sulfate, and thiourea as precursors, and subsequently chemically modified with polyaniline (PANI) to produce the Cu₂S-ZnS PANI nanocomposite. Thiourea served a dual function: it acted as a reducing agent, converting Cu²⁺ to Cu⁺, and under hydrothermal conditions, provided sulfur for the formation of Cu₂S-ZnS nanoparticles. The resulting Cu₂S -ZnS PANI nanocomposite was characterized using Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), Fourier Transform Infrared (FT-IR) spectrophotometry, and X-Ray Diffraction (XRD) techniques. The nanocomposite was subsequently applied for the removal of lead ion (Pb²⁺) from water samples. Key factors affecting Pb²⁺ removal were systematically investigated, with the maximum removal percentage (∼93% for 20 mg/L Pb²⁺) achieved at pH 6.0, using 1000 mg/L of adsorbent and a 25-min contact time. Isotherm analysis indicated that Pb²⁺ adsorption follows a multilayer mechanism with a maximum adsorption capacity of 169.5 mg/g. Kinetic studies revealed that the pseudo-first-order model accurately describes the adsorption process. The reusability test demonstrated that the Cu₂S-ZnS PANI adsorbent could be used for at least six adsorption/desorption cycles without a significant loss in performance. Overall, its high efficiency, rapid adsorption, low cost, and demonstrated reusability make the Cu₂S-ZnS PANI nanocomposite as a highly effective adsorbent for Pb²⁺ removal from wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109501"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy optimisation and performance enhancement in nutrient concentration from AnMBR effluent via electrodialysis for resource recovery","authors":"S. Hernández-Cuenca ,&nbsp;J. Carrillo-Abad ,&nbsp;A. Bouzas ,&nbsp;J. Serralta ,&nbsp;R. Barat","doi":"10.1016/j.jwpe.2026.109629","DOIUrl":"10.1016/j.jwpe.2026.109629","url":null,"abstract":"<div><div>Optimising energy consumption in electrodialysis systems treating real wastewater effluents remains a challenge, which is essential to be feasible and applicable. In this sense, long-term experiments were conducted under varying currents and applied voltages (0.1 A, 7.5 V and 10 V), aiming to determine the best operating conditions. Subsequently, long-term experiments were performed regarding operational mode in one-stage and two-stage, number of cell pairs, relaxation stages and different influent nutrient concentration to determine the most suitable configuration of an electrodialysis stack treating free-sulphide Anaerobic Membrane Bioreactor effluent.</div><div>All experiments performed successfully in terms of efficiencies, achieving 88.8 ± 3.1% and 79.6 ± 5.1% nitrogen and phosphorus removal, with 80.2 ± 7.7% and 73.6 ± 11.3% recovery, respectively. Approximately 100% of total current efficiency resulted in experiments, confirming good performance, although only a tiny fraction of current is used by the ions of interest. The best one-stage performance occurred at 7.5 V, improved when operating in two stages and when increasing number of cell pairs. Indeed, two-stages operation with 20 cell pairs represented the most favourable condition, enabling compliance with DIRECTIVE (EU) 2024/3019 while maintaining low energy demand (0.17 kWh/m³, 29.92 kWh/kg P recovered, and 4.05 kWh/kg N recovered). Relaxation stages provided no further improvements, whereas higher influent nutrient concentration enhance nutrient recovery.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109629"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From industrial waste to functional nano-adsorbent: CTAB-functionalized fly ash geopolymer for dual-dye removal: Mechanistic insights, reusability, biosafety, and antimicrobial properties","authors":"Fatima Zahra Karmil ,&nbsp;Bouchra Benhniya ,&nbsp;Noureddine El Messaoudi ,&nbsp;Fatima Lakhdar ,&nbsp;Dison S.P. Franco ,&nbsp;Samira Etahiri ,&nbsp;Ashraf M. Al-Msiedeen ,&nbsp;Hanan El Alaoui-Belghiti","doi":"10.1016/j.jwpe.2026.109610","DOIUrl":"10.1016/j.jwpe.2026.109610","url":null,"abstract":"<div><div>In this study, a high-performance CTAB-functionalized fly ash geopolymer (CTAB-GP) was engineered for the efficient removal of cationic and anionic dyes from aqueous solutions. The adsorbent was synthesized via a surfactant-assisted exfoliation process, resulting in a mesoporous nanostructure with enhanced surface area and dual-surface functionality. The material was evaluated for its ability to remove Crystal Violet (CV), Methylene Blue (MB), Rose Bengal (RB), and Methyl Orange (MO) under varying conditions of pH, contact time, initial concentration, and adsorbent dosage. Kinetic studies revealed that the adsorption process followed the Pseudo-Second-Order model, indicating chemisorption as the rate-limiting step, while equilibrium data fitted well with the Langmuir isotherm, suggesting monolayer adsorption. The maximum adsorption capacities reached 82.35 mg/g for RB, 71.8 mg/g for CV 45.4 mg/g for MB, and 16.7 mg/g for MO, with an excellent regenerability after six consecutive cycles using 0.1 M HCl / 0.1 M Na₂CO₃ for elution. Thermodynamic analysis confirmed the spontaneous and endothermic nature of the process. Notably, CTAB-GP exhibited exceptional antimicrobial activity, achieving 100% inhibition of <em>Aspergillus niger</em> and significant antibacterial effects against <em>E. coli</em> (45 mm) and <em>S. aureus</em> (38 mm) for the parent fly ash geopolymer. Cytotoxicity assessment confirmed its biocompatibility. This work demonstrates that CTAB-GP is not only a highly efficient, reusable adsorbent but also a multifunctional material with intrinsic antimicrobial properties, offering a sustainable solution for treating complex wastewater containing both organic pollutants and microbial contaminants.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109610"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"pH-responsive nanofibrous membrane with P(AA-r-MPS)/SiO2 hybrid hydrogel coating for oil-water separation","authors":"Run Yuan,&nbsp;Qimin Xuan,&nbsp;Tingting Deng,&nbsp;Wensheng Qi,&nbsp;Dapeng Liu,&nbsp;Shusu Shen,&nbsp;Ganwei Zhang,&nbsp;Yaoliang Hong","doi":"10.1016/j.jwpe.2026.109634","DOIUrl":"10.1016/j.jwpe.2026.109634","url":null,"abstract":"<div><div>The ecological environment faces significant risks from oil-containing wastewater, highlighting a pressing need for advanced and effective oil-water separation methods. Although membrane separation technology is recognized for its low energy consumption, it faces challenges including low porosity and high cost in its traditional forms. Smart membranes, offer a new path to overcome this bottleneck. This study developed a pH-responsive PVDF oil-water separation membrane by preparing an organic-inorganic hybrid material through the hydrolytic hybridization of a copolymer containing a silane coupling agent with nano-SiO₂. The smart separation membrane not only achieved a high oil-water rejection rate (&gt;99.80%) and remarkable flux of 1821 L·m⁻²·h⁻¹, but also exhibited intelligent self-cleaning properties. Leveraging its pH responsiveness, simple rinsing with acidic water effectively removed contaminants, resulting in a flux recovery rate of up to 97.90%, highlighting its significant potential for treating complex oily wastewater. Collectively, these results demonstrated that this strategy has achieved a degree of integration between high-efficiency separation performance and intelligent self-cleaning functionality, providing valuable insights and potential solutions for the advancement of intelligent separation technology.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"83 ","pages":"Article 109634"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Resin architecture as a governing factor in uranium (VI) adsorption: Integrated kinetic and equilibrium modeling of gel-type and macroporous systems","authors":"Amirhossein Wizan ,&nbsp;Atiyeh Eyvazi Atashbeik ,&nbsp;Davood Ghoddocynejad ,&nbsp;Mohammad Outokesh ,&nbsp;Seyed Mohammad Davachi","doi":"10.1016/j.jwpe.2026.109791","DOIUrl":"10.1016/j.jwpe.2026.109791","url":null,"abstract":"<div><div>The study investigated uranium (VI) adsorption using gel-type Varion-AP and macroporous A500 resins. Nonlinear kinetic analysis confirmed a mixed diffusion-controlled mechanism, but a deeper interrogation using the Weber–Morris model revealed a critical dosage-dependent kinetic transition: classical diffusion at low dosages (k_i1 &lt; k_i2) shifted to an accelerated second stage (k_i2 &gt; k_i1) at higher dosages. This behavior reflects swelling-assisted diffusion in Varion-AP and enhanced macropore accessibility in A500, quantitatively supported by effective diffusion coefficients (D_eff). Equilibrium data fitted the Freundlich isotherm (R² &gt; 0.99), confirming surface heterogeneity. Both resins showed high capacities (q_max &gt; 120 mg/g), with Varion-AP slightly higher (127.2 mg/g vs. 122.5 mg/g). These results highlight the interplay between resin structure, capacity, and mass transfer, informing optimized uranium recovery strategies.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"84 ","pages":"Article 109791"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of hybrid CaCO3 by biosurfactant for enhanced Cu2+ removal from aqueous solution","authors":"Tingting Zhang ,&nbsp;Changxiong Zou ,&nbsp;Menchuan Yuan ,&nbsp;Zhuangzhuang Yang ,&nbsp;Jianhong Han ,&nbsp;Qingkai Hu ,&nbsp;Weida Wang ,&nbsp;Zhe Liu","doi":"10.1016/j.jwpe.2026.109754","DOIUrl":"10.1016/j.jwpe.2026.109754","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"84 ","pages":"Article 109754"},"PeriodicalIF":6.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}