Environmental Technology最新文献

{"title":"Evaluation of mixed culture fungal strains for degradation of paraquat.","authors":"Alyne Vasconcelos Cavalcante, Victoria Maura Silva Bermúdez, João Pedro de Lima Alves Barbosa, Marcos Vinícius Freire Andrade, Glória Maria Marinho Silva, Kelly Rodrigues","doi":"10.1080/09593330.2025.2503491","DOIUrl":"10.1080/09593330.2025.2503491","url":null,"abstract":"<p><p><b>ABSTRACT</b>The potential of fungal mixed culture CI (<i>Aspergillus niger</i> + <i>Phanerochaete chrysosporium</i>), CII (<i>Aspergillus niger</i> AN400 <i>+</i> <i>Trametes versicolor</i>), and CIII (<i>Phanerochaete chrysosporium</i> + <i>Trametes versicolor</i>) was evaluated for paraquat removal, along with the individual potential of each fungus. In plate growth tests, only <i>Trametes versicolor</i> showed inhibition by paraquat (MI: 94.4%, 10 mg·L^-1) and the growth of <i>Aspergillus niger</i> and <i>Phanerochaete chrysosporium</i> was not inhibited by the pesticide, with maximum growth rates (<i>K</i>_max) of 2.136 day^-1 (<i>R</i>²: 0.821) and 1.632 day^-1 (<i>R</i>²: 0.713) at 40 mg·L^-1, respectively. Mixed culture CI outperformed CII and CIII, with <i>K</i>_max of 2.784 day^-1 (<i>R</i>²: 0.798; 50 mg·L^-1) and 2.352 day^-1 (<i>R</i>²: 0.939; 10 mg·L^-1), respectively, by <i>Aspergillus niger</i> and <i>Phanerochaete chrysosporium</i>. In an aqueous medium using a batch reactor, CI achieved the highest paraquat removal rate of 42.2% ± 2 at 50 mg·L^-1 without the addition of glucose, whereas non- mixed culture forms required glucose (5 g·L^-1) to achieve removals of 39.3% ± 3 for <i>Aspergillus niger</i> and 36.5% ± 0.7 for <i>Phanerochaete chrysosporium</i>. The synergy between these species was further confirmed by a paraquat removal rate (<i>k</i>) of 0.081 day^-1 (<i>R</i>²: 0.944) and a half-life (t_1/2) of 9 days. In contrast, with glucose in the medium, <i>k</i> and t_1/2 were 0.032 day^-1 (<i>R</i>²: 0.927) and 22 days. Thus, mixed culture CI demonstrated superior performance, making it suitable for efficient pollutant removal in bioreactors without the need for a cosubstrate.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4357-4369"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144141773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduction of alkalinity and establishment of vegetation on bauxite residue using <i>Aspergillus tubingensis</i> and different amendments.","authors":"Mondem Sudhakara Reddy","doi":"10.1080/09593330.2025.2514288","DOIUrl":"10.1080/09593330.2025.2514288","url":null,"abstract":"<p><p>Bauxite residue (red mud) is a by-product generated in huge quantities from alumina industries with serious environmental issues due to its strong alkalinity, sodicity and salinity. In the present study, an attempt has been made to establish the growth of Bermuda grass (<i>Cynodon dactylon)</i> using <i>Aspergillus tubingensis</i> and various soil amendments such as 10% (w/w) fly ash, sewage sludge, garden soil and 2% of gypsum (CaSO₄) in bauxite residue. <i>Aspergillus tubingensis</i> is able to produce different organic acids in response to bauxite residue. Inoculation of <i>A. tubingensis</i> significantly increased the growth of Bermuda grass in the bauxite residue amended with different ameliorants. The pH was significantly reduced from 11 to 8 in gypsum amended bauxite residue, while EC reduced in all the treatments. Organic carbon, available P, total nitrogen levels were significantly increased in sewage sludge amended bauxite residue inoculated with <i>A. tubingensis</i> followed by fly ash amendment. Soil enzyme activities such as acid phosphatase (484 µM/g/h), alkaline phosphatase (1193 µM/g/h), urease (47.3 µM/g/h) and invertase (778 µM/g/h) were increased due to <i>A. tubingensis</i> inoculation compared to their respective controls where the activities of acid phosphatase, alkaline phosphatase urase and invertase were 123, 90, 50 and 160.6 µM/g/h, respectively. Uptake of elements like Mg, K and Ca increased, while Al, Fe and Na decreased in the biomass due to <i>A. tubingensis</i> inoculation. This study demonstrated that the inoculation of <i>A. tubingensis</i> along with sewage sludge or fly ash as amendments is a sustainable technology for the establishment of green vegetation on bauxite residue.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4610-4623"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144208086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparison of the degradation of benzothiazole in the UV/H₂O₂ and UV/K_2s2o8 systems: degradation processes and degradation mechanisms.","authors":"Lei Chen, Yun Wang, Haiyang Shao, Chengkai Mao, Minghong Wu, Gang Xu","doi":"10.1080/09593330.2025.2519961","DOIUrl":"10.1080/09593330.2025.2519961","url":null,"abstract":"<p><p>The increasing presence of benzothiazole (BTH) in industrial wastewater poses significant environmental and health risks due to its persistence and toxicity. This study compares UV/persulfate (UV/K₂S₂O₈) and UV/H₂O₂ systems for benzothiazole (BTH) degradation, revealing that UV/K₂S₂O₈ achieves complete BTH removal (100%, 0.189 min^-1) versus 85% (0.092 min^-1) for UV/H₂O₂ under identical conditions. Radical scavenging experiments and LC-MS analysis demonstrate sulfate radicals outperform hydroxyl radicals in oxidizing BTH heterocyclic structure, reducing intermediates by 63% (quantified via peak area ratios). pH-dependent kinetics show UV/K₂S₂O₈ maintains efficacy (90-100% removal) across pH 3-9, while UV/H₂O₂ efficiency drops to 58% at pH > 7. Practical validation in river water confirms UV/K₂S₂O₈ robustness (98% BTH degradation), positioning it as a scalable, energy-efficient solution for refractory pollutant treatment. The results showed that the oxidant concentration and pH affected the degradation rate of BTH by changing the free radical concentration, and the UV/ K₂S₂O₈ was demonstrated to be able to achieve efficient removal of pollutants in complex environmental matrices. Free radical scavenging experiments and liquid chromatography-mass spectrometry analysis confirm that sulfate radicals are more effective than hydroxyl radicals in oxidizing and degrading BTH, enabling rapid, efficient, and environmentally friendly degradation of pollutants. This is mainly due to the higher redox potential of sulfate radicals (2.8-3.1V) compared to hydroxyl radicals (2.01V), resulting in the generation of fewer intermediates. Compared to UV/H₂O₂, UV/K₂S₂O₈ is a more effective, cleaner, and energy-saving method for pollutant removal in various complex environmental matrices.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4774-4790"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144527019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating methane production potential of <i>Sargassum muticum</i> (Yendo) Fensholt via response surface methodology.","authors":"Yiru Zhao, Marina Giblaine, Nathalie Bourgougnon, Jean-Louis Lanoisellé, Thomas Lendormi","doi":"10.1080/09593330.2025.2517396","DOIUrl":"10.1080/09593330.2025.2517396","url":null,"abstract":"<p><p>This study investigates the influence of inoculum to substrate ratios, substrate length, and freezing on the anaerobic digestion of the brown macroalga <i>Sargassum muticum</i> through batch experiments. Methane production optimisation was performed using response surface methodology with a central composite design. Biochemical methane potential tests conducted on frozen algae underscore the significant impact of the inoculum to substrate ratio, revealing that a ratio of 2 enables a high hydrolysis rate without apparent phenomena that limit methane production. In terms of modelling, the first-order model provided more accurate biochemical methane potential estimations than the Gompertz model. Furthermore, using fresh algae resulted in a 21% increase in methane production per kilogram of volatile solids compared to frozen samples. The study also confirms that high endogenous methane production can compromise BMP assay reliability. A methane potential range of 170-270 NL CH₄·kg VS^-1 was established allowing an initial assessment of energy production. The examination of <i>Sargassum muticum</i> contributes to the understanding of marine biomass anaerobic digestion processes and demonstrates its potential as a renewable energy source.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4681-4692"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144265698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of the startup phase of semi-continuous biogas reactors through co-digestion of Organic Solid Waste (OSW).","authors":"Franciele Natividade Luiz, Emilene de Carvalho Lourenço, Guilherme Pavão Gomes, Márcia Regina Becker","doi":"10.1080/09593330.2025.2548634","DOIUrl":"https://doi.org/10.1080/09593330.2025.2548634","url":null,"abstract":"<p><p>This study evaluates biogas production from co-digested organic waste in a bench-scale semi-continuous Continuous Stirred Tank Reactor (CSTR). The use of organic waste in anaerobic digestion (AD) enables sustainable practices that help diversify the energy portfolio and reach decarbonization goals. However, the challenges associated with the operation of anaerobic reactor require studies and guidelines aimed at strategies for establishing biogas plants. This study assesses the production potential at the start of the operation of a Continuous Stirred Tank Reactor (CSTR), using a mixture of organic solid waste (OSW) that includes food waste, olive oil and pasta, selected for their high organic load and lipid-rich composition-was used to assess biogas production potential at startup. Essays were performed to determine biogas production and Biochemical Methane Potential (BMP) for progressive Organic Loading Rates (OLR) added to the semi-continuous reactor. The maximum biogas yield, based on the value obtained in the BMP assay occurred at an OLR of 4.49 gVS/L, while higher rates led to system instability and a significant drop in performance to 22% Volatile Solids (VS) removal remained above 70% and the methane content achieved excellent levels throughout the operation. This study shows the feasibility of using co-digestion of organic waste to produce biogas with excellent methane and highlights the innovative application of progressive OLR ramping as a start-up strategy that stabilizes anaerobic reactor performance, addressing common challenges in biogas plant implementation. Additionally, the results underscore the contribution of biogas to achieving energy sustainability goals and reducing greenhouse gas emissions.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-10"},"PeriodicalIF":2.0,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Addition of biochar significantly promoted the biodegradation of phenol by phenol-degrading bacteria and its metabolomic analysis.","authors":"Jing Dong, Li Ren, Yuntian Liu, LingLi Xu, MengQian Zhang, Yu Xiang Liu","doi":"10.1080/09593330.2025.2550672","DOIUrl":"https://doi.org/10.1080/09593330.2025.2550672","url":null,"abstract":"<p><p>The use of biochar to assist in microbial degradation is seen as key for eliminating organic pollutants. This study examined how biochar affects the degradation of phenol by phenol-degrading bacteria (PDB). The findings indicate that phenol removal reached 82.4% at a concentration of 1300 mg/L by PDB combined with biochar, surpassing 41.6% phenol removal ratio by PDB. Microbial community analysis indicated that there was a notable increase in <i>Gammaproteobacteria, Serratia</i>, <i>Raitonia</i> and <i>Enterobacter</i> in the biochar-assisted sample. Via GC-MS analysis and metabolomic analysis, the findings revealed that the phenol degradation pathway used by PDB was an ortho-cleavage pathway. PICRUSt2 analysis suggested that the addition of biochar might enhance PDB metabolism by modulating the degradation of inprotocatechuate, toluene and phenylacetate. Metabolomic analysis indicated that biochar demonstrated potential to augment PDB biodegradation by promoting Oxygen-driven metabolism and fuelling bacterial energy needs. This study sheds light on how biochar affects PDB biochemical breakdown.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of pre-treatment of polyurethane sponge installed in the biologically stabilized biosand filter.","authors":"Mirella Klausen da Silveira, Ailton Borges Rodrigues, Beatriz Silvestre Puchalski, André Fazolo, Tiago Fazolo, Maurício Luiz Sens, Bruno Segalla Pizzolatti","doi":"10.1080/09593330.2025.2550673","DOIUrl":"https://doi.org/10.1080/09593330.2025.2550673","url":null,"abstract":"<p><p>Household slow sand filters are considered simple, efficient, and low-cost solutions for accessing drinking water in isolated communities. To ensure safe handling, it is essential for their operation to be simple and reliable, while requiring the lowest possible frequency of maintenance, as this will be carried out by the residents themselves. This is the first study to evaluate the performance of intermittent biosand filters (BSFs) using a polyurethane sponge positioned on top of the filter media, acting as a physical pre-treatment barrier. Two filters were compared: one with the sponge (BSF-S) and one without (BSF), analysing the effects on water quality, cleaning frequency, and material replacement. In the BSF-S, two sponges were used sequentially: BSF-S1 operated for 344 days and, after its replacement, BSF-S2 operated for an additional 189 days, while the BSF operated continuously for 533 days. No significant differences were observed among the different filter configurations in terms of turbidity, dissolved oxygen, and apparent colour. However, the study water differed significantly from all filtered samples (<i>p</i> < 0.05), confirming filtration effectiveness. In contrast, regarding cleaning frequency, BSF had a total of 11 filter runs, while BSF-S recorded 5 filter runs (3 with BSF-S1 and 2 with BSF-S2), demonstrating that the presence of the sponge fulfilled its role in physical pre-treatment. Incorporating the sponge at the top of the filter media improved operational performance by reducing maintenance needs without compromising water quality, supporting its use in remote households.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced struvite production via membrane capacitive deionization and electrolysis: interference of humic acid and calcium.","authors":"Aditya Kurnia Aji Pangestu, Arseto Yekti Bagastyo, Ervin Nurhayati, Jr-Lin Lin, Fahrudin Sidik","doi":"10.1080/09593330.2025.2549531","DOIUrl":"https://doi.org/10.1080/09593330.2025.2549531","url":null,"abstract":"<p><p>This study examined struvite crystal formation for nutrient recovery in the presence of coexisting cations and organic substances. Coupled membrane capacitive deionization (MCDI) with sacrificial magnesium anode electrolysis was performed to produce struvite crystals from synthetic wastewater containing ammonium, phosphate, sodium, calcium, and humic acid (HA). In this way, MCDI was employed to adsorb coexisting cations onto the activated carbon (AC) electrode and retain <math><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></math> and <math><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>-</mo></mrow></msubsup></math> ions in the effluent. The MCDI effluent was the input for Mg-based electrolysis, which used an AZ31B Mg alloy as the anode to release Mg²⁺ ions. Various initial Nitrogen/Phosphate (N/P) molar ratios were prepared (i.e. 1:1, 5:1, and 10:1) in the absence and presence of 10 mM competitor ions and 100 mg⋅L^-1 of HA. The results showed that MCDI can retain <math><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></math> and <math><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>-</mo></mrow></msubsup></math> approximately 84.19 and 78.07%, respectively, which is equivalent to the ion electrosorption capacity of the AC electrode, approximately 15.53 mg⋅g^-1 for <math><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></math> and 21.45 mg⋅g^-1 for <math><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>-</mo></mrow></msubsup></math>. Interestingly, the addition of co-ions, such as Na⁺ and Ca²⁺, can remain 2-5 times <math><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></math> and <math><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>-</mo></mrow></msubsup></math> in the effluent. After Mg-based electrolysis, <math><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></math> and <math><msubsup><mrow><mi>PO</mi></mrow><mn>4</mn><mrow><mn>3</mn><mo>-</mo></mrow></msubsup></math> ions increased by approximately 87.32% and 63.65%, respectively. In the presence of Na⁺, coupling MCDI with the electrolysis process produced up to 0.6195 g of high-purity struvite. Conversely, HA and Ca²⁺ significantly reduced crystal purity and altered morphology. Under an N/P ratio of 10:1, without co-ions or humic acid, the energy consumption for struvite recovery was 15.88 Wh g^-1.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anaerobic digestion of food waste under non-conventional operating conditions: enhancing process stability while reducing energy and chemical inputs.","authors":"Tiago B Ferreira, Fabiana Passos, Cláudio L de Souza","doi":"10.1080/09593330.2025.2550670","DOIUrl":"https://doi.org/10.1080/09593330.2025.2550670","url":null,"abstract":"<p><p>Decentralized anaerobic treatment presents a sustainable alternative for managing the substantial generation of food waste. However, the associated high costs may render this option less feasible for small- to medium-scale systems. To explore a novel strategy for cost reduction in anaerobic digestion systems used for food waste treatment, this study applied organic loading rates (OLR) ranged from 0.6-1.9 kg VS m⁻³ d⁻¹ in a reactor under non-conventional conditions combined in anaerobic reactors: non-controlled temperature and pH, intermittent mixing, semi-continuous feeding, and biomass sedimentation. To evaluate the reactor's performance for 194 days, key parameters such as process stability, volatile solids (VS) removal, methane production, and biomass accumulation were monitored. Throughout the operation, the reactor temperature fluctuated between 19 and 36 °C, while the sludge retention time (SRT) values were up to 140% higher than the hydraulic retention time (HRT), indicating effective decoupling compared to the equal SRT and HRT observed in the conventional continuous stirred tank reactor (CSTR) model. Compared to conventional CSTR operation, the intermittent mixing approach still achieved an 80% reduction in mixing energy requirements. The results demonstrated that the optimal conditions were achieved at an OLR of 1.5 kg VS m⁻³ d⁻¹ and an HRT of 36 days. Under these conditions, a VS removal efficiency of 82% was obtained, with a methane production rate of 0.645 m³ CH₄ m⁻³ d⁻¹. Overall, the anaerobic reactor demonstrated stable performance under simplified operational strategies, reaching efficiencies comparable to conventional mesophilic systems with temperature control and alkalinity supplementation.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on multivariate salt phase equilibrium relationship of high-salt wastewater under the influence of organic impurities in evaporation process.","authors":"Lin Lin, Xiangcheng Kong, Lipeng He, Boya Zhang, Shujuan Liu, Jianliang Xue, Bo Wang, Meng Zheng, Lijun Chen","doi":"10.1080/09593330.2025.2549530","DOIUrl":"https://doi.org/10.1080/09593330.2025.2549530","url":null,"abstract":"<p><p>The small amount of organic impurities in the pre-treated saline wastewater will affect the original solubility of the saline wastewater, which is one of the key issues that restrict the evaporation of saline wastewater with near-zero discharge under the working condition. We have investigated the solid-liquid phase equilibrium relationship under typical organic impurities in falling film evaporation tubes with different parameters. Results show the phase diagram of Na⁺, Mg²⁺//Cl^--H₂O in the presence of organic impurities belongs to the phase diagram of a simple system. The phase diagram contains a co-saturation point, two single-variable curves and four crystallization zones. In addition, the overall change in the solubility of the ternary system of Na⁺, Mg²⁺//Cl^--H₂O under organic impurities was not significant with the increase in temperature. However, the solubility of MgCl₂ was more affected by temperature and increased by 5.67% when the temperature increased from 303.15 K to 373.15 K. This study provides a theoretical basis for rational control of salt scaling in the evaporation process of coal chemical industry. It is important to ensure the efficient operation of the evaporator, realize the recycling of inorganic salt products, and ultimately achieve the goal of 'near-zero discharge'.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-9"},"PeriodicalIF":2.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}