Water Resources and Industry最新文献

{"title":"Assessment of the water quality and microbial regrowth in drinking water treatment plants and the distribution network","authors":"Siphelele Nduli ,&nbsp;Memory Tekere ,&nbsp;Vhahangwele Masindi ,&nbsp;Spyros Foteinis","doi":"10.1016/j.wri.2025.100290","DOIUrl":"10.1016/j.wri.2025.100290","url":null,"abstract":"<div><div>Recurring contamination of drinking water and microbial regrowth in distribution networks remains an issue of prime concern to water provision authorities. This is common in the developing world, where aging and under-developed infrastructure along with degraded freshwater resources exacerbate the problem. Here, the year-round measurements, on a weekly basis, of the quality of drinking water from a typical water treatment and distribution system in the South African setting are reported. Results confirmed that the drinking water treatment plants under study rely on heavily degraded freshwater, mainly affected by microbial contamination which could suggest the release of untreated or poorly treated wastewater in receiving water bodies, a common problem in low-and-medium-income countries (LMICs). In most cases, freshwater was effectively treated (e.g., 100% removal for <em>E. coli</em> and over 99%, 92%, and 83% removal for total coliforms, turbidity, and colour, respectively) to meet the drinking water quality standards for South Africa and the world health organisation (WHO) guidelines. Yet, in some monthly measurements, certain contaminants such as ammonia were above the prescribed limits, suggesting the need to operationally improve water treatment and/or curbing the release of untreated or poorly treated wastewater in the catchment. Alarmingly, microbial regrowth was identified within the distribution networks, and this was significantly correlated (p &lt; 0.01) with the distance (from 0 to 101 km) that the water travels within each distribution network and nodes. Also, large seasonal variations in the water quality were observed, with water quality being poorer during winter, likely tracing back to environmental factors in combination with parts of the distribution system being laid proximal to the surface or above ground. Overall, a clear correlation between the chlorine concentration and microbial failure was observed. This could be attributed to high chlorine demand, which devoids the system of residual chlorine, thus, to a larger extent, creating an environment that is conducive to microbial regrowth. Therefore, it can be concluded that high chlorine demand is the main contributor towards microbial regrowth within the water distribution networks, and, as such, comprehensive chlorine demand and decay studies are needed to identify whether chlorine booster stations are required, particularly at the distal ends of the network. This will inform the sustainable top-up of chlorine residual in the distributed water, hence effectively suppressing microbial regrowth. Albeit, high chlorine levels are not a panacea, since these can lead to the formation of toxic and carcinogenic disinfection by-products such as trihalomethanes (THMs). Therefore, first and foremost, focus should be placed on safeguarding the quality of freshwater resources.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100290"},"PeriodicalIF":4.5,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Current and future chloride concentrations in a large river - will a disaster happen again?","authors":"Ewa Szalińska ,&nbsp;Jacek Motyka ,&nbsp;Kajetan d’Obyrn ,&nbsp;Paulina Orlińska-Woźniak ,&nbsp;Elżbieta Nachlik ,&nbsp;Andrzej Mączałowski ,&nbsp;Paweł Wilk","doi":"10.1016/j.wri.2025.100289","DOIUrl":"10.1016/j.wri.2025.100289","url":null,"abstract":"<div><div>Chlorides are considered as an important factor promoting the development of the golden algae (<em>Prymnesium parvum)</em> and their presence was crucial during the Oder River ecological disaster in 2022. Since industrial waters from mining activities in the Upper Silesia region are discharged not only into the Oder River, but also into the other large European River (Vistula), there is growing concern about a possible re-occurrence of such an event. Combining catchment modeling and in-situ monitoring, the impact of mining discharges from 17 active and inactive hard coal mines on the calculation profile of the Vistula River, located in a potential risk zone of golden algal blooms, has been investigated. Moreover, future chloride concentrations have been predicted through model simulations for two time horizons: near- (2024–2050) and far-future (2074–2099), and for two Representative Concentration Pathways: RCP 4.5 and RCP 8.5. The results showed significant variability in chloride concentrations with monitoring data, indicating concentrations already exceeding those observed during severe algal bloom events. Furthermore, despite the selected scenario and time horizons, the simulated chloride concentrations may still promote golden algae development under both dry- and wet-climate scenarios, with extreme values potentially surpassing 3000 mg/L. Our results emphasize the urgent need for proactive water management strategies to reduce chloride contamination, and to protect aquatic ecosystems in this river. Failure to act in this area may lead to a repetition of catastrophic ecological events.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100289"},"PeriodicalIF":4.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lab-scale experiments with a monovalent ion selective membrane capacitive deionization for nitrate removal","authors":"Hanna Rosentreter ,&nbsp;Maja Moch ,&nbsp;David Schödel ,&nbsp;Michael Jeske ,&nbsp;Tim Oddoy ,&nbsp;Jochen Meier-Haack ,&nbsp;Amit N. Shocron ,&nbsp;André Lerch","doi":"10.1016/j.wri.2025.100288","DOIUrl":"10.1016/j.wri.2025.100288","url":null,"abstract":"<div><div>Groundwater with high nitrate concentrations requires treatment before potable use. Conventional treatment methods such as nanofiltration and reverse osmosis can be used for desalination of most solutes. In contrast, a monovalent selective membrane capacitive deionization (mMCDI) can be used for selective nitrate removal. We use a nanofiltration membrane and anion exchange membranes with an additional neutral layer (AEM-Neutral) or a polyamide layer (AEM-PA) for selective nitrate removal with mMCDI by using a solution of mixed monovalent and polyvalent ions. Monovalent ion selectivity in short-term experiments is up to 17.3 with a nanofiltration membrane, up to 1.7 for AEM-Neutral and up to 5.2 for AEM-PA, whereby the specific energy consumption and water recovery depends on cell structure, applied electric voltage, flow rate and desorption time. Selective nitrate removal with AEM-PA or AEM-Neutral at 0.8 V demonstrated a specific energy consumption of 2 Wh g⁻¹ removed nitrate, lower than pressure-driven membrane processes.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100288"},"PeriodicalIF":4.5,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 a quad-oxidant hybrid process based on hydrodynamic cavitation and UV radiation for Allura red degradation","authors":"Mahdi Shahryari,&nbsp;Soroush Baradaran,&nbsp;Omid Vahidi","doi":"10.1016/j.wri.2025.100287","DOIUrl":"10.1016/j.wri.2025.100287","url":null,"abstract":"<div><div>This research investigated Allura Red (AR) degradation using a quad-oxidant hybrid process with hydrodynamic cavitation (HC) promoted by ultraviolet radiation (UV) in combination with sodium peroxydisulfate (PS) and hydrogen peroxide (H₂O₂) as chemical agents. The experiments were carried out for 4 L synthetic AR-polluted wastewater containing 25 ppm AR. Optimization was performed using a Box-Behnken design (BBD) with H₂O₂ (0–70 ppm), PS (0–200 ppm), and UV radiation (0–32 W). Response surface methodology (RSM) analysis revealed optimal conditions for the HC/H₂O₂/PS/UV process as 41.3 ppm H₂O₂, 197 ppm PS, and 31.7 W UV power. Under these conditions, 99.23 % decolorization efficiency with a kinetic rate constant (k) of 80.53 × 10⁻³ min⁻¹ and yield efficiency of 9.90 × 10⁻³ mg kJ⁻¹ was achieved. The optimum configuration also resulted in remarkable 74.33 % reduction of Chemical Oxygen Demand (COD) within 120 min. Techno-economic analysis, based on the efficiency-cost ratio (ECR) was conducted on all processes revealed that the ECR of the optimized HC/H₂O₂/PS/UV process was attained at 398.40. To clarify the role of reactive species, the influence of radical scavengers was investigated under the optimized conditions. Decolorization efficiency was reduced to 74.53 % and 53.10 % with the addition of tert-butanol and ethanol, respectively, with corresponding rate constants of 22.8 × 10⁻³ min⁻¹ and 12.62 × 10⁻³ min⁻¹.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100287"},"PeriodicalIF":4.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective boron recovery from real acidic stripping solution by chemical oxo-precipitation method","authors":"Joanna Bok-Badura ,&nbsp;Sylwia Bajkacz ,&nbsp;Alicja Kazek-Kęsik ,&nbsp;Krzysztof Karoń ,&nbsp;Łukasz Kot ,&nbsp;Agata Jakóbik-Kolon","doi":"10.1016/j.wri.2025.100286","DOIUrl":"10.1016/j.wri.2025.100286","url":null,"abstract":"<div><div>The effluent generated during the desorption of boron from an ion exchange column is a major economic and environmental challenge of the ion exchange boron removal method. The chemical oxo-precipitation method (COP) is a rapid and efficient approach for boron removal from solutions of high concentration at room temperature. Therefore, this method was tested for boron removal using a real stripping solution obtained from boron desorption with hydrochloric acid after ion-exchange flue gas desulfurization (FGD) wastewater treatment. The following parameters were studied: hydrogen peroxide and calcium ratio to boron, pH of the solution, order of unit actions, pretreatment with oxidant, and calcium compound influence. We found that the literature recommended pre-oxidation step was unnecessary, and our process was rapid and effective, providing 96.8 % of boron recovery after 5 min at room temperature using the following conditions: H₂O₂/B = 3:1, Ca/B = 2:1, pH = 10.5 set after addition of chemicals. Since boron removal depends on at least three parameters, our novel approach to obtain optimal conditions of boron removal involved the precipitation of perborates from real wastewater by applying the central composite design (CCD) as an experimental strategy. The optimum conditions determined from the CCD experiment were pH = 9, H₂O₂/B = 3.5, and Ca/B = 3.5, resulting in 94 % boron recovery (in real experiment). Our study proved that the COP method was suitable for boron recovery from real acidic stripping solution, making the ion-exchange method of boron removal fully complete, economical, and environmentally friendly.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100286"},"PeriodicalIF":4.5,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of contaminants from liquid after the hydrothermal carbonization of sewage sludge using a combination of membrane techniques and struvite precipitation","authors":"Klaudia Szkadłubowicz ,&nbsp;Agnieszka Urbanowska ,&nbsp;Maciej Śliz ,&nbsp;Izabela Kalemba-Rec ,&nbsp;Małgorzata Wilk","doi":"10.1016/j.wri.2025.100285","DOIUrl":"10.1016/j.wri.2025.100285","url":null,"abstract":"<div><div>Post-processing liquid (HTCL), generated from the hydrothermal carbonization (HTC) of sewage sludge, is a highly organic by-product and one of the primary challenges of this technology. To enable its sustainable treatment, a combination of membrane techniques and nutrient recovery via struvite precipitation was applied. Accordingly, the performance of HTCL as well as the liquid resulting from the struvite precipitation (HTCLS) has been investigated in conjunction with the use of ceramic and polymeric membranes. Three types of ceramic membranes and eleven polymeric membranes were tested in consideration of permeate properties and specific membrane characteristics. In addition, the influence of struvite precipitation on the properties of the membrane and resulting permeates were investigated.</div></div><div><h3>Results</h3><div>demonstrated that permeate properties vary significantly among membrane types. Generally, for HTCL, the NPO30P membrane provided the most effective filtration, achieving a reduction of 24.4 % in NH₄⁺ and 22 % in nitrogen compounds. In the case of HTCLS, the PES 5 kDa membrane resulted in the highest contaminant reduction, for example decreasing NH₄⁺ levels by 68.8 % and nitrogen compounds by 52 %. Permeate physical and chemical characteristics, such as pH, conductivity and COD, also differed significantly between HTCL and HTCSL processes. For instance, COD values for HTCL ranged from 27390 to 12100 mg/L, while for HTCSL permeates, it was 26480 to 11210 mg/L, indicating a lower level of organic contaminants following struvite precipitation. Membrane fouling occurred more rapidly during HTCL filtration compared to HTCSL, with an increase in membrane relative permeability of 9–74 % observed for HTCLS compared to HTCL.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100285"},"PeriodicalIF":4.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mapping sewage treatment plants for wastewater reclamation and reuse in industrial parks of Peninsular Malaysia: A path towards water security","authors":"Nur Hairunnisa Rafaai ,&nbsp;Khai Ern Lee ,&nbsp;Noor Zarina Mohd Nazir ,&nbsp;Ainul Rasyidah Ab Rahim ,&nbsp;Thian Lai Goh ,&nbsp;Mazlin Mokhtar ,&nbsp;Wan Abd Rahim Wan Abdullah ,&nbsp;Huzaini Husain ,&nbsp;Raja Baharudin Raja Mamat","doi":"10.1016/j.wri.2025.100284","DOIUrl":"10.1016/j.wri.2025.100284","url":null,"abstract":"<div><div>The rapid industrialisation and urbanisation in recent decades have significantly increased global wastewater generation, particularly in industrial parks. Sewage treatment plants (STPs) near these parks are crucial for promoting sustainable practices. Instead of discharging treated wastewater, reclaiming and reusing it can minimise the water footprint. However, there has been insufficient evaluation of wastewater reclamation potential within existing STPs. This study integrates the Analytical Hierarchy Process (AHP) with spatial analysis to assess the suitability of STPs for wastewater reclamation and reuse in Peninsular Malaysia's industrial parks. Factors considered include STP design capacity, wastewater quality, proximity to industries, non-domestic water tariffs and geographical features. AHP analysis assigned weights to these factors, achieving a consistency ratio of less than 0.10. The resulting suitability map categorises STPs into five levels, showing that 64 % of the land area and 40.5 % or 2922 of STPs have very low reclamation potential due to inadequate wastewater management infrastructure. In contrast, only 0.1 % of the land and 0.2 % or 17 of STPs out of approximately 7208 STPs exhibit high reclamation potential. A holistic approach is essential to evaluate multiple factors, enabling operators to identify suitable STPs for reclamation and ensuring regional water security.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100284"},"PeriodicalIF":4.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring pharmaceuticals and personal care products to assess water quality changes and pollution sources in a drinking water reservoir catchment","authors":"Kinga Ślósarczyk ,&nbsp;Filip Wolny ,&nbsp;Andrzej J. Witkowski","doi":"10.1016/j.wri.2025.100283","DOIUrl":"10.1016/j.wri.2025.100283","url":null,"abstract":"<div><div>This research aimed to identify sources of pharmaceuticals and personal care products (PPCPs) in the Kozłowa Góra catchment, southern Poland, and assess their temporal and spatial variability. PPCP monitoring was conducted from 2020 to 2022. Samples were taken from the Brynica River and other streams. Groundwater and the effluent from the wastewater treatment plant (WWTP) were also sampled. The monitoring screened 109 PPCPs using the LC-MS/MS method. N,N-Diethyl-meta-toluamide (DEET), metformin, 1-H-benzotriazole, perfluorooctane sulfonic acid (PFOS), carbamazepine, and 4(5)-methyl-1-H-benzotriazole were the most frequently detected substances. The highest total PPCP concentrations in surface waters reached 30790 ng/L, with up to 53 compounds detected at one point. Results indicated temporal and spatial variability, with higher concentrations and more PPCPs during winter periods and increased contamination downstream from the WWTP. DEET was the only contaminant consistently found in the shallow aquifer discharged into the Brynica, however groundwater impact on the river's water quality is negligible. The study confirmed the WWTP as the primary source of PPCPs, with the number of detected substances in effluent samples amounting to 65 and their total concentrations reaching 148265 ng/L. Additional sources included the airport, uncontrolled/illegal domestic sewage discharges, and human activities in forested areas. This study was the first in Poland to implement a PPCP monitoring approach in a drinking water reservoir catchment area using multiple monitoring points and sampling campaigns. The results revealed the constant presence of PPCPs in a moderately urbanised catchment area, highlighting the importance of regular monitoring to understand PPCP migration in the environment.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100283"},"PeriodicalIF":4.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Small hydropower impacts on water quality: A comparative analysis of different assessment methods","authors":"Paweł Tomczyk ,&nbsp;Michał Tymcio ,&nbsp;Alban Kuriqi ,&nbsp;José Maria Santos ,&nbsp;Mirosław Wiatkowski","doi":"10.1016/j.wri.2025.100282","DOIUrl":"10.1016/j.wri.2025.100282","url":null,"abstract":"<div><div>This study aims to evaluate the spatial and temporal variations of physico-chemical parameters at selected small run-of-river hydropower plants along a 126 km section of the Bóbr River in southwestern Poland. The main contribution of this study lies in comparing different water quality classification methods from different regions worldwide. Our results show that the spatio-temporal changes in physico-chemical parameters in the studied section of the Bóbr River are, to a larger extent, due to anthropogenic pressures (i.e., urbanization and agriculture) unrelated to the operation of hydropower plants. Analysis of variance (ANOVA) confirmed the statistical significance (p &lt; 0.05) of the results for 8 (i.e., EC, temperature, pH, DO, NO₂-N, TDS, NH₄-N, and COD) out of 16 physicochemical parameters. Hierarchical cluster analysis also showed a greater influence of factors other than hydropower plants on water quality. The average compliance with the standards based on the selected water quality classifications was 76.9%. The Polish classification proved to be the most appropriate classification for assessing the status of physico-chemical elements of the Bóbr River. The findings from this study can be used for various applications, e.g., formulating strategies for sustainable water management in hydropower plant catchment areas, planning new hydropower plants, and developing operating regulations for existing plants.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100282"},"PeriodicalIF":4.5,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-waste to environmental purifier: Application of potato peel for acid red 73 adsorption from leather dyeing effluent","authors":"Fatema-Tuj Zohra ,&nbsp;Sobur Ahmed ,&nbsp;Md Zahangir Alam ,&nbsp;Md Nurnabi ,&nbsp;Nazia Rahman","doi":"10.1016/j.wri.2025.100281","DOIUrl":"10.1016/j.wri.2025.100281","url":null,"abstract":"<div><div>Potato peel powder (PP) was prepared from kitchen wastes and explored in removal of Acid Red 73 (AR 73) dye from leather dyeing effluent. PP was characterized through FTIR, BET, SEM, XRD and EDX analysis. SEM micrographs illustrated rough and porous structure of PP that support the adsorption process. FTIR spectrum exhibited the changes caused by formation of hydrogen bonding, complex bonding, or other electrostatic interaction after dye adsorption. Wide and frail peaks in the XRD image indicated existence of amorphous carbon. BET analysis exhibited mesoporous structure of PP with average pore diameter of 85.98 Å. The impact of various influences viz. pH, dosages, concentration, time and temperature were explored through batch investigation. The maximum AR73 dye adsorption capacity of PP was 258.39 mg/g. The dye adsorption on PP complied both the Langmuir (R² = 0.989) and Freundlich (R² = 0.993) isotherm, preferably Freundlich model. The pseudo-second-order kinetic model (R² = 0.999) was fitted better, i.e. chemisorption. The equilibrium adsorption capacity was 135.34 ± 1.59 mg/g at 298 K, which was decreased to 125.34 ± 1.81, 114.27 ± 1.43, and 104.08 ± 1.53 mg/g at 308, 318 and 328 K, respectively. Negative Gibbs free energy (ΔG) revealed that adsorption of AR 73 dye on PP was spontaneous. In real sample analysis, about 98.17 ± 0.58 % dye removal was obtained with 137.39 ± 2.46 mg/g capacity. This research revealed that PP has a good prospect for the application of AR 73 dye removal from leather dyeing effluent.</div></div>","PeriodicalId":23714,"journal":{"name":"Water Resources and Industry","volume":"33 ","pages":"Article 100281"},"PeriodicalIF":4.5,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}