Journal of water process engineering最新文献

{"title":"Mass-balance analysis of sulfamethoxazole during extracellular-polymeric-substance extraction from excess sludge","authors":"Ming Cheng ,&nbsp;Yijia Qian ,&nbsp;Bohan Zhao ,&nbsp;Nan Zhang ,&nbsp;Lihua Sun ,&nbsp;Liang Zhao ,&nbsp;Ranbin Liu ,&nbsp;Xiaodi Hao ,&nbsp;Chen Shi","doi":"10.1016/j.jwpe.2025.107859","DOIUrl":"10.1016/j.jwpe.2025.107859","url":null,"abstract":"<div><div>Recycling of biopolymers such as alginate-like extracellular polymers (ALE) and alkaline-extraction extracellular polymeric substances (AEPS) from excess sludge is expected to solve the resource-climate crisis and transform water-resource plants. However, the extracted biopolymers may be contaminated with waste products entering the environment, limiting biopolymer applications and necessitating by-product treatment. This study quantifies the effects of different factors on the occurrence of the antibiotic sulfamethoxazole (SMX) in biopolymers extracted from four sludge categories: conventional activated sludge, anaerobic granular sludge, aerobic digested sludge, and bacterial–algal granular sludge. The mass balance of SMX is analyzed throughout the extraction process. SMX occurrence is higher in the water phase than in the other mass flows and is significantly higher in AEPS than in ALE because ALE contains no humic acids and low amounts of extracted protein. The AEPS level is the highest (~28 %) in aerobic granular sludge. The pH value, which affects the dissociation degree of SMX and the zeta potential of AEPS, potentially affecting the electrostatic interaction, exerts the greatest impact on SMX assignment, followed by temperature and SMX concentration. These results provide a theoretical basis for understanding the interaction between sludge and SMX. They also provide an important reference for optimizing the extracellular-polymeric-substance extraction process and processing the extraction residue.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107859"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917667","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":"Feather keratin-based hybrid adsorbents: Reproducibility and efficacy in metal removal from synthetic wastewater","authors":"Irum Zahara ,&nbsp;Muhammad Faisal Irfan ,&nbsp;Tariq Siddique ,&nbsp;Aman Ullah","doi":"10.1016/j.jwpe.2025.107891","DOIUrl":"10.1016/j.jwpe.2025.107891","url":null,"abstract":"<div><div>This study investigates the reproducibility of two effective keratin-based biopolymers (KBPs), modified through specific chemical processes, and their subsequent combination for the simultaneous removal of multiple metals from synthetic wastewater. The KBPs modified with an ionic liquid and propylamine are designated as KBP-IV and KBP-V, respectively. Under simulated industrial conditions, both KBP-IV and KBP-V exhibited high adsorption capacities, effectively removing oxyanions (e.g., V⁵⁺, Cr⁶⁺, As³⁺) and divalent cations (e.g., Ni²⁺, Co²⁺, Cd²⁺), respectively. The surface characteristics of the triplicate modifications of each KBP-IV or KBP-V in this study demonstrated consistent thermal properties, crystallinity, and functional groups. These results confirm the reproducibility of these materials, as reflected in the consistent metal adsorption outcomes across the various modifications. A hybrid adsorbent (KBP-IX) was produced by combining KBP-IV and KBP-V in a 1:1 ratio to evaluate their combined effectiveness in multi-metal removal. KBP-IX adsorbed all divalent cations and oxyanions, with better divalent cation removal than KBP-V but lower oxyanion removal than KBP-IV. Isotherm studies were performed using several two and three-parametric nonlinear isotherm models for the adsorption of V⁵⁺ and Cr⁶⁺ on KBP-IX. Cr⁶⁺ adsorption was aligned more closely with the Redlich-Peterson isotherm model (χ² = 1.94E-5, R² = 0.9986), which incorporates elements of both the Langmuir (monolayer) and Freundlich (multilayer) models, while V⁵⁺ was better represented by the Langmuir (monolayer) isotherm model (χ² = 1.75E-4, R² = 0.9838). The findings of this work underscore the promising potential of these KBPs for valorization and their reproducibility in effectively removing divalent cations and oxyanions from synthetic industrial wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107891"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917664","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":"A recycled polymetallic catalyst derived from acid mine drainage(AMD) for efficient tetracycline removal via peroxymonosulfate activation","authors":"Penghui Li ,&nbsp;Ting Luo ,&nbsp;Chunyao Gu,&nbsp;Peng He,&nbsp;Jianyu Zhu,&nbsp;Min Gan,&nbsp;Ke Zhang","doi":"10.1016/j.jwpe.2025.107899","DOIUrl":"10.1016/j.jwpe.2025.107899","url":null,"abstract":"<div><div>Catalysts are critical components in advanced oxidation processes (AOPs) for removing recalcitrant antibiotics from water. The preparation of metal catalysts through waste conversion has gradually received growing attention owing to their sustainability and low-cost. Herein, acid mine drainage (AMD) as wastewater offers a tantalizing resource to be harnessed due to its high concentration of metal ions. To reduce the continuous consumption of metallic resources and prevent environmental pollution by heavy metals. This study, utilizing the abundance of transition metal ions in AMD, devises a straightforward methodology for adept transformation into persulfate catalysts—metal sulfides(MS) for antibiotic removal, enabling the MS/PMS system to sustainably degrade tetracycline(TC) over a wide pH range (2.0–10.0). Notably, it recycled more than 97 % of the transition metals in AMD; the removal of TC (30 mg/L) by adsorption and advanced oxidation was as high as 92 %, and MS can achieve 99.5 % removal of TC (10 mg/L) at low concentrations. Transition metal elements such as manganese and iron in the recovered catalytic material dispersed on MS played an indelible role in activating the PMS, and the non-radical pathway dominated by singlet oxygen led to the degradation of the TC. Overall, MS prepared based on the concept of treating pollution with waste had excellent TC removal capability, providing an innovative approach for the reduction of recalcitrant antibiotics (TC) and the resourceization of AMD.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107899"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923437","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":"Application of solid-waste derived biochar from Penaeus vannamei mariculture for black-odorous water remediation","authors":"Wenjing Tian ,&nbsp;Xiangyu Zhang ,&nbsp;Wenjie Xu ,&nbsp;Lele Wu ,&nbsp;Zhitao Huang ,&nbsp;Yongkun Cai ,&nbsp;Shuangyong Zhang ,&nbsp;Xiefa Song ,&nbsp;Xian Li","doi":"10.1016/j.jwpe.2025.107878","DOIUrl":"10.1016/j.jwpe.2025.107878","url":null,"abstract":"<div><div><em>Penaeus vannamei</em>, a premium aquatic protein source, experienced rising global demand accompanied by increasing aquaculture production, yet this growth has concurrently led to the accumulation of solid aquaculture waste. Currently, the treatment of mariculture solid waste remains a pressing challenge due to technical limitations and its inherent high salinity. Coastal eutrophication poses a persistent threat to nations worldwide, necessitating long-term remediation and maintenance of black-odorous water body, with previous studies confirmed biochar's efficacy as an in-situ remediation material. This study pioneered a novel preparation method for biochar(BC) derived from <em>Penaeus vannamei</em> mariculture solid waste; systematically investigated the effects of feedstock mass ratio (shrimp residual feed/feces: shrimp shell = a 1:0, b 4:1, c 2:1, d 1:1) and pyrolysis temperature (500 °C, 700 °C, 900 °C) on the biochar's physicochemical properties and heavy metal removal efficiency, while comprehensively evaluated its remediation performance for coastal black-odorous water. Results demonstrated the shrimp solid-derived BC700c prepared under optimal conditions (2:1, 700 °C) exhibited significantly better physicochemical characteristics and increased significantly (<em>P</em> &lt; 0.05) removal rates for aquatic heavy metals, along with promising removal rate for total nitrogen (33.02 %), total phosphorus (49.09 %), Cu(II) (51.88 %), and Cd(II) (54.41 %) in coastal black-odorous water body. Furthermore, BC700c substantially improved microbial diversity, with the Shannon index increasing by 21.64 %. It promoted the relative abundance of functionally beneficial phyla, particularly <em>Proteobacteria</em> and <em>Actinobacteriota</em>, which helpful to heavy metal and nutrient (N/P) removal. This research provided groundbreaking insights into sustainable aquaculture waste valorization and an innovative technological solution for effective black-odorous water remediation.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107878"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923439","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":"High-performance fixed-bed adsorption using active-site-controlled amine-functionalized adsorbent for naproxen removal: insights into isotherms, kinetics, and regeneration","authors":"Nor Aida Yusoff ,&nbsp;Luqman Chuah Abdullah ,&nbsp;Siti Nurul Ain Md. Jamil ,&nbsp;Teo Ming Ting ,&nbsp;Halimatun Sakdiah Zainuddin","doi":"10.1016/j.jwpe.2025.107802","DOIUrl":"10.1016/j.jwpe.2025.107802","url":null,"abstract":"<div><div>The removal of trace pharmaceutical contaminants from wastewater remains a critical challenge owing to the limitations of conventional adsorbents, including slow kinetics, high internal diffusion resistance, and limited reusability. To overcome these challenges, this study presents a novel amine-functionalized adsorbent, EDA-((PE/PP)-g-GMA), which was synthesized via radiation-induced grafting. The material exhibited exceptional adsorption performance, achieving &gt;96 % naproxen removal in a fixed-bed system under high-flow conditions (7 mL/min) and a short bed height (1 cm). With effluent concentrations below 0.25 mg/L, approaching the regulatory limits established for drinking water, the adsorbent exhibited a high capacity of 300.33 mg/g and successfully treated 3.78 L before reaching breakthrough. The rapid adsorption of naproxen was attributed to the abundance of active functional groups on the surface of EDA-((PE/PP)-g-GMA), following pseudo-second-order kinetics and the Sips isotherm, with active site interactions serving as the rate-limiting step for efficient uptake. Thermodynamic analysis confirmed an exothermic and spontaneous process, whereas FTIR and XPS analyses revealed hydrogen bonding and electrostatic and hydrophobic interactions governing adsorption. Reusability studies demonstrated stable performance over nine cycles without a significant loss of functionality. The fixed-bed adsorption process aligned well with the Thomas, Yoon-Nelson, and BDST models, confirming its scalability. This study demonstrates the effectiveness of the novel adsorbent in fixed-bed systems, highlighting its potential for large-scale environmental remediation while addressing the limitations of current technologies, which is essential for environmental protection and public health preservation against the long-term impacts of pharmaceutical pollution.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107802"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894780","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":"Numerical study of the separation performance of granular sludge and activated sludge in gravity-driven cyclonic field","authors":"Fei Huang ,&nbsp;Yuantao Zhang ,&nbsp;Jinyi Tian","doi":"10.1016/j.jwpe.2025.107842","DOIUrl":"10.1016/j.jwpe.2025.107842","url":null,"abstract":"<div><div>The cultivation of aerobic granular sludge (AGS) in a continuous flow process requires an external granular sludge and flocculent activated sludge separator to return the faster settling granular sludge. Experimental studies have confirmed that hydrocyclones are an effective solution for this purpose. This study employed CFD numerical simulations to investigate the operational performance of hydrocyclones at different installation angles. Furthermore, it explored the principles of gravity-driven hydrocyclone-enhanced separation of granular sludge and activated sludge, as well as the hydrocyclone-promoted granulation. The split ratio and separation efficiency are generally proportional to the installation angle, with the optimal angle range identified as −15°~15°. Activated sludge shows a better flow separability with low velocity fluctuations, whereas granular sludge shows more pronounced velocity variations. The results indicate that the inclined gravity-driven hydrocyclone exhibit only a limited difference in separation performance between granular sludge and activated sludge. Therefore, the potential reason for the hydrocyclone-promoted granulation may not be the traditionally considered separative effect, but rather the particle motion induced by the hydraulic shear flow field.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107842"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898374","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":"Improved charge carrier dynamics in rationally designed F-g-C3N4/In2O3 type II heterojunction for efficient pollutant removal: Mechanistic insights, real-world applications, and toxicity study","authors":"Arun S. Chopade ,&nbsp;Akshay A. Ransing ,&nbsp;Vinayak G. Parale ,&nbsp;Santosh V. Mohite ,&nbsp;Abhijit N. Kadam ,&nbsp;Jiseung Kim ,&nbsp;Vaishali A. Patil ,&nbsp;Sadaf Jamal Gilani ,&nbsp;Mohaseen S. Tamboli ,&nbsp;Hyun-Kyung Kim ,&nbsp;Dattakumar S. Mhamane ,&nbsp;Hyung-Ho Park ,&nbsp;Mukund G. Mali","doi":"10.1016/j.jwpe.2025.107810","DOIUrl":"10.1016/j.jwpe.2025.107810","url":null,"abstract":"<div><div>Herein, we present a simple chemical bath/impregnation method for synthesizing fluorine (F)-doped graphitic carbon nitride (g-C₃N₄)/indium oxide (In₂O₃) type-II heterojunction for enhanced photocatalytic degradation of methylene blue (MB) and tetracycline (TC), and reduction of Cr(VI) pollutants under visible light irradiation. Heterojunction formation and F-doping were confirmed using several physicochemical characterization techniques. The synthesized F-doped g-C₃N₄/In₂O₃(FCN/INO) photocatalyst demonstrated remarkable degradation efficiencies, achieving 97 % MB degradation in 60 min, 97 % TC degradation in 35 min, and 96 % Cr(VI) reduction in 40 min. The FCN/INO sample exhibited exceptional photocatalytic activity for pollutant degradation in tap and lake water, and also for effectively degrading MB + TC mixtures. It demonstrated outstanding stability over five cycles, confirming excellent recyclability. Strong anti-interference activity ensured robustness against co-existing ions, and toxicity studies confirmed the formation of non-toxic degradation products, highlighting its suitability for long-term environmental applications. The improved photocatalytic performance of FCN/INO is ascribed to its exceptional optical, electronic, and surface properties, which promote efficient electron-hole pair generation, separation, and rapid transport, as confirmed by photoluminescence (PL), electrochemical impedance spectroscopy, and photocurrent density data. The charge carrier lifetime, as determined via time-resolved PL, was found to be significantly longer in FCN/INO than in its bare counterparts.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107810"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904385","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":"Efficient adsorption of tetracycline by phytic acid modulated ramie fiber-derived porous carbon: Performance, mechanism, and application potential","authors":"Dongxinyu Chen ,&nbsp;Yuwei Deng ,&nbsp;Boyan Cui ,&nbsp;Shou Mei ,&nbsp;Lixi Xiao ,&nbsp;Huo Zhou ,&nbsp;Ziyi Zhan ,&nbsp;Rongling Wang ,&nbsp;Xuanyuan Pei ,&nbsp;Qiang Li ,&nbsp;Jun Wan ,&nbsp;Yuxuan Ye ,&nbsp;Fei Pan","doi":"10.1016/j.jwpe.2025.107857","DOIUrl":"10.1016/j.jwpe.2025.107857","url":null,"abstract":"<div><div>Tetracyclines are widely adopted in various industries and ubiquitous in wastewater, and developing efficient removal technologies remains a challenge. In this study, a phytic acid pre-modulated porous carbon originating from ramie fiber (PARPC) was prepared to remove tetracycline from water. Batch experiments showed that PARPC had excellent adsorption capacity (Q_max = 520.47 mg/g) for TC, whereas the adsorption of TC by the carbon material without PA pretreatment (RPC) was almost negligible. Various coexisting substances (sulfate, nitrate, chloride, phosphate, carbonate, and humic acid) had a negligible effect on the adsorption of TC by PARPC. FTIR, XPS, and DFT analysis indicated that π-π bonding and C-O-P formation were responsible for TC adsorption. The fix-bed system further verified that PARPC was capable of continuously treating TC-containing wastewater for &gt;600-bed volume (BV). The depleted PARPC was completely regenerated by NaOH solution without significant reduction in treating capacity. This study not only presents a novel concept for preparing functional adsorbent, but also offers an effective solution for addressing antibiotic pollutants in aqueous environments.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107857"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894674","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":"Comparative biosorption efficiency of Agaricus bisporus mushroom and spent mushroom compost for cobalt and manganese removal from aqueous solution: Equilibrium, kinetic and thermodynamic analysis","authors":"Ankita,&nbsp;Nisha Sharma","doi":"10.1016/j.jwpe.2025.107839","DOIUrl":"10.1016/j.jwpe.2025.107839","url":null,"abstract":"<div><div>The search for affordable and environmentally friendly adsorbents has become a top priority for the effective removal of heavy metals to mitigate their harmful effects using waste residues. In this direction, the present study investigates the effectiveness of <em>Agaricus bisporus</em> mushroom (ABM) and its spent mushroom compost (SMC), a waste, as potential adsorbents for removing cobalt Co(II) and manganese, Mn(II) from aqueous solutions. The optimal conditions for the maximum removal of these metals were found to be at pH 5, 0.5 g of biosorbent, 6 h of equilibrium time, and initial concentrations of 24 μg/mL for Co(II), while 15 μg/mL for Mn(II). A pseudo second order kinetic model with R² &gt; 0.991 for both the metals, and Freundlich's isotherm model with R² &gt; 0.997 for Co(II) and R² &gt; 0.985 for Mn(II) provided good correlation with the data. Thermodynamic analysis indicated the spontaneous and endothermic nature of the biosorption process for both metals. Characterization techniques including FTIR, XRD, SEM, and EDX confirmed the accumulation of Co(II) and Mn(II) on the biosorbent surfaces with the involvement of hydroxyl, carboxyl, amine, phosphate, and amide groups in metal uptake. The results indicated that SMC has higher biosorption efficiency than ABM for both the metals, accompanied by higher biosorption of Co(II) than Mn(II). Furthermore, both ABM and SMC have shown remarkable regeneration and recyclability up to seven adsorption-desorption cycles with significant adsorption of both the metals.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107839"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894675","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":"Molecularly imprinted optical probe based on in-situ CoFe2O4/CNDs for monitoring 2,4,6-para trinitrophenol in aqueous medium with integrated smartphone detection","authors":"Komal Murugan ,&nbsp;Abirami Natarajan ,&nbsp;Vetrinelaven Murthy Sridevi","doi":"10.1016/j.jwpe.2025.107879","DOIUrl":"10.1016/j.jwpe.2025.107879","url":null,"abstract":"<div><div>Assessing TNP in actual water samples is essential to reduce its harmful impacts on human health and aquatic ecosystems. This study details the development of an innovative and sustainable dual-mode optical biosensor that employs Cobalt ferrite magnetic nanoparticles (CF-MNPs), Carbon nanodots (CNDs), and molecularly imprinted polymers (MIPs) for the precise and sensitive identification of 2,4,6-para trinitrophenol <strong>(</strong>TNP) in water-based environments. The plant-derived CNDs from <em>Piper longum</em> demonstrate improved fluorescence properties, leading to a notable enhancement in the sensor's performance. The CF-MNPs/CNDs/MIP composite improves the selectivity and sensitivity of the optical sensing probe by promoting efficient electron transfer with TNP. The dual-mode biosensing platform integrates fluorescence and colorimetric detection, leveraging the peroxidase-mimicking activity of CF-MNPs/CNDs/MIPs to oxidize TMB for a visual colorimetric response. The biosensor demonstrates exceptional analytical capabilities, reaching a limit of detection (LOD) of 1.09 nM (fluorescence) and 3.07 nM (colorimetry). Furthermore, the analysis of real samples exhibited remarkable reliability, achieving a recovery rate of 101 %. To improve portability and field applicability, an RGB-based smartphone sensing method was incorporated, achieving a limit of detection 10 nM, facilitating rapid and economical on-site identification of TNP. This study presents a sustainable, highly selective, and ultrasensitive dual-mode optical biosensor, providing a strong foundation for real-time environmental monitoring of water contaminants.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"74 ","pages":"Article 107879"},"PeriodicalIF":6.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906520","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}