Environmental Technology最新文献_第3页

Manganese-modified corn silk composite mycelial pellets immobilized bioreactor for simultaneous removal of nitrate, zinc, and nickel. 锰改性玉米丝复合菌丝球固定化生物反应器同时去除硝酸盐、锌和镍。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-15 DOI: 10.1080/09593330.2026.2732107

Yao Yao, Yinan Wang, Junfeng Su, Xue Li, Yihan Bai, Xuan Li

{"title":"Manganese-modified corn silk composite mycelial pellets immobilized bioreactor for simultaneous removal of nitrate, zinc, and nickel.","authors":"Yao Yao, Yinan Wang, Junfeng Su, Xue Li, Yihan Bai, Xuan Li","doi":"10.1080/09593330.2026.2732107","DOIUrl":"10.1080/09593330.2026.2732107","url":null,"abstract":"The non-compliant discharge of electroplating wastewater containing nitrate (NO3--N) and heavy metals (HMs) harms aquatic ecosystems and makes it more difficult to control water pollution. This study prepared manganese-modified corn silk (Mn/CS) composite mycelial pellets (Mn-CMP) by combining Mn/CS with the fungal strain Alternaria sp. YNX. These Mn-CMP were then used as novel immobilized carriers to immobilize the strain Zoogloea sp. ZY8 to construct a dual-species immobilized bioreactor. Under optimal conditions, with influent concentrations of 20.0 mg L-1 NO3--N, 1.0 mg L-1 Zinc(II) (Zn(II)), and 1.0 mg L-1 nickel(II) (Ni(II)), the bioreactor achieved simultaneous removal of NO3--N at 97.50%, Zn(II) at 99.50%, and Ni(II) at 96.87%. During this process, manganese (Mn) oxides acted as electron shuttles and active sites to enhance electron transfer, while oxygen-containing functional groups promoted HMs adsorption, and bioprecipitation further facilitated HMs immobilization. Furthermore, high-throughput sequencing revealed core functional genes for nitrogen and energy metabolism, which microorganisms regulated to respond to environmental changes. This study provided a new perspective for using Mn-CMP to immobilize functional bacteria to treat industrial wastewater co-contaminated with NO3--N and HMs.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3298-3311"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148976339","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}

引用次数: 0

Comparative experimental evaluation of sequential biological-UV/H₂O₂ treatment for endocrine-disrupting chemical mixtures under controlled batch conditions. 在可控的批处理条件下，生物- uv /H₂O₂顺序处理内分泌干扰化学混合物的比较实验评价。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-23 DOI: 10.1080/09593330.2026.2735896

Mehak Puri, Kavita Gandhi, M Suresh Kumar

{"title":"Comparative experimental evaluation of sequential biological-UV/H₂O₂ treatment for endocrine-disrupting chemical mixtures under controlled batch conditions.","authors":"Mehak Puri, Kavita Gandhi, M Suresh Kumar","doi":"10.1080/09593330.2026.2735896","DOIUrl":"10.1080/09593330.2026.2735896","url":null,"abstract":"The study evaluates the degradation of a mixture of frequently detected endocrine disrupting chemicals in municipal wastewater using six sequential biological-advanced oxidation treatment systems. The evaluated systems include UV, H2O2, and UV/H2O2 applied before or after biological treatment. The performance of the conventional municipal treatment plant was compared with sequential processes under previously optimized operating conditions (pH ≈ 5 (AOP), 7 (bio), 450 W UV power, 2.0 mM H₂O₂, reaction time for AOP: 60 min, and bio process: 6 h). The conventional system achieved only 36.41 ± 0.53% to 55.11 ± 0.48% removal of the mixture of target EDCs, whereas the bio/UV/H2O2 was the most effective, achieving complete diethyl phthalate removal and >90 ± 0.65% of butyl paraben and bisphenol A, with 90.5 ± 1.33% reduction in chemical oxygen demand. The pseudo-first-order kinetic analysis indicated an enhanced degradation efficiency, with a maximum rate constant of 0.0048 min-¹. The energy consumption ranged from 9.47 × 10² to 1.56 × 10⁴ kWh kg-¹ COD, with the operating cost primarily driven by electricity (≈0.16 USD L-¹). These findings provide mechanistic and comparative insight into hybrid treatment performance under controlled conditions; however, validation under environmentally relevant concentrations and continuous-flow systems is required before practical implementation.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3326-3341"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029946","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}

引用次数: 0

Process-oriented screening of agro-industrial waste streams for co-digestion in WWTP anaerobic digesters. 面向过程筛选的农业-工业废水流在污水处理厂厌氧消化池中共消化。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-23 DOI: 10.1080/09593330.2026.2735890

Maria Carolina Costa, Miguel Campos, Marco Silva, Aline Martins Pinheiro, M Salomé Duarte, João R Sousa, Carlos Afonso Teixeira

{"title":"Process-oriented screening of agro-industrial waste streams for co-digestion in WWTP anaerobic digesters.","authors":"Maria Carolina Costa, Miguel Campos, Marco Silva, Aline Martins Pinheiro, M Salomé Duarte, João R Sousa, Carlos Afonso Teixeira","doi":"10.1080/09593330.2026.2735890","DOIUrl":"10.1080/09593330.2026.2735890","url":null,"abstract":"Wastewater utilities require a systematic method for screening agro-industrial co-substrates before testing them in sewage-sludge digesters. This study developed and applied a hierarchical preliminary screening framework based on physicochemical characterisation, biochemical methane potential assays, first-order kinetic modelling, and volumetric methane production. Seven waste streams were evaluated individually: a fat-rich fraction recovered from meat-processing wash water, four meat-processing wash waters, used cooking oil, and confectionery-production wash water. Eight fixed-ratio mixtures were then assessed using selected meat-processing streams, cheese whey, olive mill wastewater, and winery wastewater. Specific methane production of the individual waste streams ranged from 0.087 to 0.969 m³ CH₄ kg-¹ VS. Across the mixtures, final SMP ranged from 0.390 to 0.855 m³ CH₄ kg-¹ VS and t₉₀ from 9.0 to 23.3 d. TS, VS, and COD were associated with volumetric methane production at days 10 and 30 but not with final SMP, k, or t₉₀. The COD-VMP10 and TS-VMP30 models explained 87.5% and 86.0% of the variability, showing that volumetric methane output was influenced by feedstock concentration. Biochemical compatibility was classified using final SMP, t₉₀, and evidence of sustained methane suppression; VMP10 and VMP30 then refined priorities within each category. The cheese whey + meat-processing wash water R2 mixture (M1; 1:1 v/v) was prioritised because it combined high SMP (0.792 m³ CH₄ kg-¹ VS), rapid apparent conversion (t₉₀ = 11.8 d), and the highest volumetric relevance. The framework converts physicochemical and BMP-derived results into a traceable basis for selecting external co-substrates for subsequent controlled validation with municipal sludge.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3312-3325"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149030004","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}

引用次数: 0

A sustainable approach to the treatment of textile reverse osmosis concentrate using the photo-Fenton process. 用光-芬顿法处理纺织品反渗透浓缩液的可持续方法。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-17 DOI: 10.1080/09593330.2026.2730325

Gamze Canbakal, Öykü Nur Ersöz, Gülay Arslan Çene, Senem Yazici Guvenc, Emine Can-Güven, Gamze Varank

{"title":"A sustainable approach to the treatment of textile reverse osmosis concentrate using the photo-Fenton process.","authors":"Gamze Canbakal, Öykü Nur Ersöz, Gülay Arslan Çene, Senem Yazici Guvenc, Emine Can-Güven, Gamze Varank","doi":"10.1080/09593330.2026.2730325","DOIUrl":"10.1080/09593330.2026.2730325","url":null,"abstract":"Textile industry wastewater consists of colored wastewater containing high concentrations of organic matter, complex components, reactive dyes, and chemical residues. While reverse osmosis (RO) membrane systems are frequently used to sustainably manage high-volume wastewater streams, they also produce a concentrated, resistant, and nonbiodegradable effluent. In this study, the photo-Fenton process was applied and optimized using Box-Behnken Design (BBD) to treat RO concentrate containing high concentrations of toxic and pollutant species. H2O2/COD, Fe2+/H2O2, and reaction time were selected as operating parameters, while COD, color index (CI), ultraviolet absorbance at 254 nm (UV254), and ultraviolet absorbance at 280 nm (UV280) removal efficiencies were selected as model responses. Statistically, the model's fits were evaluated using variance analysis. Numerical analysis determined the optimum process conditions as H2O2/COD 2.0, Fe2+/H2O2 0.25, and reaction time 68.4 min at pH 3.0. Under optimum conditions, the validation experiments demonstrated that the photo-Fenton process achieved removal efficiencies of 78.5% for COD, 96.6% for CI, 82.5% for total suspended solids, 92.8% for UV254, and 85.0% for UV280. The calculated operating cost of the process was 14.3 €/m3. The obtained results showed that the applied photo-Fenton process effectively removed pollutants from RO concentrate, and that the BBD could be used to optimize its operating conditions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3280-3297"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148988565","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}

引用次数: 0

Fulvic acid: a novel biofilm denitrification enhancer. 黄腐酸：一种新型生物膜反硝化增强剂。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-09-13 DOI: 10.1080/09593330.2026.2722341

Meng-Yuan Yu, Jun-Lin Li, Zhi-Fei Li, Jun Xie, Dong Wei

{"title":"Fulvic acid: a novel biofilm denitrification enhancer.","authors":"Meng-Yuan Yu, Jun-Lin Li, Zhi-Fei Li, Jun Xie, Dong Wei","doi":"10.1080/09593330.2026.2722341","DOIUrl":"10.1080/09593330.2026.2722341","url":null,"abstract":"To address the challenges of prolonged start-up cycles and poor operational stability in biofilm reactors for treating high ammonia nitrogen pollution in aquaculture effluent, this study adopted fulvic acid (FA) as a novel biofilm enhancer to systematically analyze its regulatory mechanisms on denitrification performance and biofilm formation in sequencing batch biofilm reactors (SBBR). Through microplate biofilm formation experiments and SBBR process validation, researchers found that the biofilm formation index reached 1.4 at an FA concentration of 1200 mg/L. FA improved biofilm structural stability by promoting extracellular polymer secretion, yielding a 22-fold increase in biofilm thickness compared with the control group (the biofilm thickness peaked at 2208.3 μm). Additionally, high FA concentrations (>500 mg/L) strengthened denitrification processes by facilitating carbon source supply and electron transfer, enriched denitrifying functional bacteria such as Comamonadaceae, and inhibited Gram-positive bacteria (e.g., Actinobacteriota). The removal efficiencies of NH4+-N, NO₃--N, and total nitrogen reached 79.67%, 80% and 62.4%, respectively. This study reveals that FA enhances SBBR denitrification through dual mechanisms of carbon source supplementation and physicochemical property regulation, providing an efficient and cost-effective regulatory strategy for aquaculture effluent treatment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3122-3136"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148955244","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}

引用次数: 0

Multiscale evolution of VOC-loaded activated carbon during thermal regeneration: from contaminant desorption to carbon matrix reorganization. 热再生过程中voc负载活性炭的多尺度演化：从污染物解吸到碳基质重组。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-08-05 DOI: 10.1080/09593330.2026.2709050

Zihao Guo, Mei Lu, Chuanfeng Zhao, Laiyou Cui, Neng Yu, Fangliang Ji, Kun Yang, Yiliang Lu

{"title":"Multiscale evolution of VOC-loaded activated carbon during thermal regeneration: from contaminant desorption to carbon matrix reorganization.","authors":"Zihao Guo, Mei Lu, Chuanfeng Zhao, Laiyou Cui, Neng Yu, Fangliang Ji, Kun Yang, Yiliang Lu","doi":"10.1080/09593330.2026.2709050","DOIUrl":"10.1080/09593330.2026.2709050","url":null,"abstract":"Efficient regeneration of spent activated carbon (SAC) is critical for sustainable VOC abatement, yet the multiscale structural evolution during thermal treatment remains poorly understood. This study elucidates the multiscale structural evolution mechanism of SAC during thermal regeneration - from contaminant desorption to carbon matrix reorganization - through integrated multi-technique characterization (BET, SEM, TGA, XRD, FTIR). Key findings reveal a three-stage 'cleaning-reconstruction-degradation' mechanism: (i) Low-temperature treatment (300-400°C) removes surface contaminants and oxygen-containing groups, reopening blocked micropores; (ii) Optimal treatment at 400-500°C for 1-2 h achieves near-complete contaminant removal (>95%) while inducing controlled graphitization and beneficial mesoporosity development, restoring SBET to 965-1020 m²/g with well-preserved microporous architecture, indicating high potential for adsorption capacity recovery; (iii) Excessive treatment (≥600°C for 3 h) causes micropore collapse and sintering, reducing surface area. These findings establish a scientifically grounded optimal regeneration window (400-500°C, 1-2 h) that balances contaminant desorption efficiency with carbon matrix preservation, offering practical guidance for energy-efficient industrial regeneration of VOC-laden activated carbon from organic chemical manufacturing processes.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3002-3012"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148677707","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}

引用次数: 0

A low-phosphorus PASP-based inhibitor for corrosion and scale control in industrial circulating water: performance evaluation and mechanistic insights. 一种用于工业循环水腐蚀和结垢控制的低磷pasp基缓蚀剂：性能评价和机理见解。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-08-10 DOI: 10.1080/09593330.2026.2683307

Yu Qiu, Yongkang Xing, Jiaqi Qin, Chunming Zhao, Xingqian Wang, Zhongde Wang

{"title":"A low-phosphorus PASP-based inhibitor for corrosion and scale control in industrial circulating water: performance evaluation and mechanistic insights.","authors":"Yu Qiu, Yongkang Xing, Jiaqi Qin, Chunming Zhao, Xingqian Wang, Zhongde Wang","doi":"10.1080/09593330.2026.2683307","DOIUrl":"10.1080/09593330.2026.2683307","url":null,"abstract":"The development of efficient low-phosphorus water treatment formulations is essential for sustainable industrial water management. In this study, a novel quadri-component corrosion and scale inhibitor PPHZ was developed by rationally combining biodegradable polyaspartic acid (PASP), phosphonobutane-tricarboxylic acid (PBTCA), hydrolyzed polymaleic anhydride (HPMA), and ZnCl2. The formulation exhibits excellent dual-functional performance in both scale and corrosion inhibition. At a dosage of 50 mg/L, PPHZ achieves 95% CaCO3 scale inhibition by effectively distorting crystal growth and completely transforming calcite/aragonite into non-adherent vaterite. Notably, only 10 mg/L of PPHZ is sufficient to completely inhibit CaSO4 scale formation. In simulated circulating water, PPHZ achieves a corrosion inhibition efficiency of 90% for carbon steel at 30 mg/L. Electrochemical analysis reveals that PPHZ simultaneously suppresses both anodic and cathodic reactions through a 'Zn2+-bridging' hybrid film mechanism, while surface characterization (SEM-EDS, XRD) confirms the formation of a dense hybrid protective film. The formulation has a theoretical phosphorus content of only 2.296%, achieving >92% phosphorus reduction compared to conventional phosphorus-based agents, in line with the sustainable development trend of water treatment technologies. PPHZ provides an effective strategy for integrated corrosion and scale control in industrial water systems.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"2985-3001"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148705913","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}

引用次数: 0

Utilization of pig and cattle manure as solid fuels: energy potential and environmental considerations. 猪粪和牛粪作为固体燃料的利用：能源潜力和环境考虑。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-08-21 DOI: 10.1080/09593330.2026.2717213

Eunsung Lee, Hyojin Cho, Junsoo Ha, Seongwook Oa

{"title":"Utilization of pig and cattle manure as solid fuels: energy potential and environmental considerations.","authors":"Eunsung Lee, Hyojin Cho, Junsoo Ha, Seongwook Oa","doi":"10.1080/09593330.2026.2717213","DOIUrl":"10.1080/09593330.2026.2717213","url":null,"abstract":"This study assessed the feasibility and environmental implications of utilizing pig and cattle manure as solid fuels, with a focus on flue-gas emissions and ash recyclability. Cattle manure - derived solid fuel, produced by reducing moisture content to approximately 4%, achieved a lower heating value (LHV) of 14.6 MJ kg-¹ and an ash content of 21.5%, meeting Republic of Korea solid-fuel quality standards (LHV ≥ 12.6 MJ kg-¹, ash ≤ 30%, moisture < 20%). In contrast, pig manure - derived solid fuel exhibited a moisture content (12.5%) that satisfied the standard, but a lower LHV (8.5 MJ kg-¹) and higher ash content (34.6%), failing to meet fuel quality criteria. Stack measurements revealed distinct emission characteristics. For cattle manure, selective non-catalytic reduction (SNCR) enabled stable emission control, with dust (1.3 mg m-³), CO (105.7 ppm), NOx (46.8 ppm), and SOx (17.2 ppm) within regulatory limits. Conversely, pig manure combustion produced excessive SOx emissions (286 ppm vs. 60 ppm limit) even with SNCR, indicating need for additional desulfurization or alternative utilization pathways. Residue analysis showed that over 90% of ash was recovered as bottom ash, with phosphorus concentrated in this fraction, indicating reuse potential. However, pig manure ash contained elevated Cu and Zn levels, exceeding fertilizer standards and requiring stabilization before recycling. Overall, cattle manure demonstrated favorable environmental performance, whereas pig manure posed challenges related to sulfur-related air pollution and heavy-metal enrichment. These results highlight the need to jointly consider environmental risk management and resource recovery when promoting livestock manure as a renewable energy source.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3043-3052"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148789858","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}

引用次数: 0

Development and optimization of a thermally controlled UV/H₂O₂ reactor for controllable gas-phase hydroxyl radical generation. 可控气相羟基自由基生成的热控UV/H2O2反应器的开发与优化。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-08-19 DOI: 10.1080/09593330.2026.2718996

Fangyuan Ma, Zihao Lin, Yi Xiao, Yiqing Li, Daocheng Gong, Yuanhang Peng, Boguang Wang, Congrong He, Zoran Ristovski, Hao Wang

{"title":"Development and optimization of a thermally controlled UV/H2O2 reactor for controllable gas-phase hydroxyl radical generation.","authors":"Fangyuan Ma, Zihao Lin, Yi Xiao, Yiqing Li, Daocheng Gong, Yuanhang Peng, Boguang Wang, Congrong He, Zoran Ristovski, Hao Wang","doi":"10.1080/09593330.2026.2718996","DOIUrl":"10.1080/09593330.2026.2718996","url":null,"abstract":"Hydroxyl radicals (•OH) dominate atmospheric oxidation chemistry, yet their controlled and reproducible generation in laboratory systems remains technically challenging. In this work, a gas-phase UV/H2O2-based Hydroxyl Radical Generation System (HyRaG) was developed and experimentally optimized to provide stable and tunable •OH production under precisely regulated thermal and flow conditions. The HyRaG integrates three functional modules: a quartz double-cylinder photolysis reactor, a closed-loop dual-channel temperature control unit capable of maintaining outlet temperature variations within ±1°C during continuous operation, and a mass-flow-regulated N2/H2O2 vapor delivery system. An outlet-based sulfur dioxide (SO2) decay method was employed to quantify •OH generation under carrier gas flow rates of 10-300 mL min-1 and temperature of 15-50°C, yielding •OH concentrations ranging from 0.41-2.04 × 1011 molec.cm-3. Single-factor experiments revealed parabolic dependences of •OH generation on both operational parameters, with optimal conditions near 100 mL min-1 and 40°C. Further optimization using Response Surface Methodology (RSM) based on a Central Composite Design (CCD) produced a robust second-order predictive model (R2 = 0.9735), demonstrating significant quadratic effects of both temperature and carrier gas flow rate, while their interaction was statistically insignificant. By decoupling radical generation from the reaction environment and stabilizing thermal conditions, HyRaG enables a controllable and reproducible oxidizing environment for atmospheric simulation studies and provides a scalable platform for mechanistic investigations of radical-driven gas-phase chemistry.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3053-3065"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148789918","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}

引用次数: 0

Electrocoagulation-crystallization synergistic regulation for efficient fluoride removal and cryolite recovery from simulated photovoltaic wastewater. 模拟光伏废水中高效除氟和冰晶石回收的电絮凝-结晶协同调控

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2026-09-01 Epub Date: 2026-08-11 DOI: 10.1080/09593330.2026.2711880

Dongni Li, Lingling Lai, Ru Wang

{"title":"Electrocoagulation-crystallization synergistic regulation for efficient fluoride removal and cryolite recovery from simulated photovoltaic wastewater.","authors":"Dongni Li, Lingling Lai, Ru Wang","doi":"10.1080/09593330.2026.2711880","DOIUrl":"10.1080/09593330.2026.2711880","url":null,"abstract":"This study addresses the pollution challenges posed by fluoride-containing wastewater in the photovoltaic industry and explores the potential for fluorine resource recovery. It proposes a seed-induced electrocoagulation-crystallization (EC-C) strategy to achieve efficient fluoride removal and high-value recovery of cryolite (Na3AlF6). The key operating parameters for electrocoagulation (EC) were systematically optimized, with optimal conditions determined as: electrode area of 150 cm2, electrode spacing of 1.2 cm, 0.05 M NaCl + NaHCO3 composite electrolyte, and initial fluoride concentration of 3000 mg/L. Under these conditions, fluoride removal efficiency reached 94.4% with minimal energy consumption and anode loss, conforming to pseudo-first-order kinetics. To regulate crystallization pathways and product quality, seed-assisted crystallization was introduced: Commercial Na3AlF6 seed crystals (CNSC) outperformed Autocatalysed seeds crystals (ASC), with an optimal dosage of 0.75 g administered via stepwise addition over 0-20 min, significantly enhancing product phase content. This yielded high-content cryolite with 97.5% content. FTIR/XRD analysis revealed that fluorinated aluminum intermediates undergo progressive dehydration and transformation into a cryolite crystal phase dominated by Al-F bonds. This study established an integrated pathway for efficient fluoride removal and high-value recovery through coupled regulation of parameter windows and seeding timing, providing theoretical and process foundations for the high-value utilization of fluorinated photovoltaic wastewater.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3029-3042"},"PeriodicalIF":2.2,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148711727","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}

引用次数: 0