Environmental Technology最新文献

Optimization and application of Musa paradisiaca-derived mesoporous hydrogel beads for selective adsorption of potentially toxic elements from aqueous environments. 天蚕衍生介孔水凝胶珠选择性吸附水中潜在有毒元素的优化与应用。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2482971

T J Jacklien Emema Rose, P Baskaralingam, Jeny Rachel Biju, Sivanesan Subramanian

{"title":"Optimization and application of Musa paradisiaca-derived mesoporous hydrogel beads for selective adsorption of potentially toxic elements from aqueous environments.","authors":"T J Jacklien Emema Rose, P Baskaralingam, Jeny Rachel Biju, Sivanesan Subramanian","doi":"10.1080/09593330.2025.2482971","DOIUrl":"10.1080/09593330.2025.2482971","url":null,"abstract":"Hydrogel beads were constructed using sodium alginate (SA) and banana pith powder (BPP). The ability of beads to adsorb Copper (Cu2+), Lead (Pb2+) and Nickel (Ni2+) was examined using SA-BPP ratios (1:1, 1:2, 1:3, 1:4, 1:5, 1:0 and 0:1). BET, FTIR, SEM-EDS, TGA and ZP were used to analyse the composite structural characteristics. BET surface area of SA-BPP (1:5) is found to be 28.308 m2/g. The impacts of adsorbent blend ratio, dosage, adsorption contact time, pH, and temperature were evaluated. The efficiency was attained at SA-BPP (1:5), 0.3 g, 180 min, pH 6 and 35°C, with adsorption rates of 83.38% for Cu2+, 77% for Pb2+ and 94.7% for Ni2+. The pseudo-first-order equation displayed good adsorption mechanism using (R2 = 0.993, 0.998 and 0.994) for Cu2+, Pb2+ and Ni2+. The Freundlich adsorption isotherm fits perfectly for the adsorption process of SA-BPP (1:5) (R2 = 0.967) for Pb2+ and Langmuir (R2 = 0.979 and 0.983) for Cu2+ and Ni2+. The thermodynamic analysis shows that the adsorption process is endothermic. The removal efficiency was determined by optimizing the theoretical adsorption experiments through the Box-Behnken Design (BBD). Cumulatively, the Cu2+, Pb2+ and Ni2+ ions have an electrostatic nature that facilitates their easier acceptance of the SA-BPP (1:5) adsorbent electrons. After five cycles, a maximal removal effectiveness of 75% is achieved, which concludes a long-lasting adsorbent for industrial wastewater.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3973-3995"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729442","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

Nano bio-polymeric sintered capillary tubes for enhanced lead removal from water: a comparative study of performance and fluid dynamics. 纳米生物聚合物烧结毛细管用于增强水中铅的去除：性能和流体动力学的比较研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2479710

Kenechukwu Keluo Onyechi, Chinenye Adaobi Igwegbe

{"title":"Nano bio-polymeric sintered capillary tubes for enhanced lead removal from water: a comparative study of performance and fluid dynamics.","authors":"Kenechukwu Keluo Onyechi, Chinenye Adaobi Igwegbe","doi":"10.1080/09593330.2025.2479710","DOIUrl":"10.1080/09593330.2025.2479710","url":null,"abstract":"This study introduces the development of nano bio-polymeric sintered capillary tubes (StC) for effective lead removal from contaminated water. Bio-polymers from palm fronds, periwinkle shells, and snail shells were used to synthesise nanoparticles, characterised for particle size (39.13-59.14 nm), porosity, and thermal stability (up to 300°C). Integrated into a capillary system, PfStC achieved 81.73% lead removal, outperforming PwStC (72.33%) and SnStC (59.7%) This high performance is attributed to the synergistic effects of the nanostructured bio-polymers and the capillary action that enhances fluid dynamics within the tubes. The adsorption mechanism involves a combination of ion exchange, complexation, and physical filtration facilitated by the bio-polymeric nanoparticles. The study further highlights the scalability of this approach for large-scale water purification, underscoring its potential for addressing widespread water contamination challenges. Additionally capillary action enhanced flow rates (5.63 × 10⁻⁷ m³/s) and capillary rise (0.0152 m). Spectral analysis revealed that ion exchange and complexation were the dominant mechanisms in lead capture. These findings demonstrated the practical applications of nano bio-polymeric sintered capillary tubes in water purification systems, offering a sustainable and cost-effective solution for real-world heavy metal remediation. The combined effects of nanostructure and capillary action, and the use of cost-effective, and sustainable solution for lead remediation in water highlight the potential for scaling this technology for large-scale lead remediation.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3870-3886"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729436","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

Ability of equilibrium and non-equilibrium models to simulate the effects of vermicompost and hydraulic conditions on nitrate and DOC leaching. 平衡和非平衡模型模拟蛭石堆肥和水力条件对硝酸盐和 DOC 沥滤影响的能力。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2024-01-31 DOI: 10.1080/09593330.2024.2309476

Hossein Bagheri, Azizallah Izady, Hamid Zare Abyaneh

{"title":"Ability of equilibrium and non-equilibrium models to simulate the effects of vermicompost and hydraulic conditions on nitrate and DOC leaching.","authors":"Hossein Bagheri, Azizallah Izady, Hamid Zare Abyaneh","doi":"10.1080/09593330.2024.2309476","DOIUrl":"10.1080/09593330.2024.2309476","url":null,"abstract":"ABSTRACTThis study aims to model the effects of saturated-unsaturated flow rates and initial moisture content on nitrate and dissolved organic carbon (DOC) leaching in soils amended and unamended with vermicompost using equilibrium and non-equilibrium models. Flow rates ranging from 0.4 to 5.1 cm3/min were applied to the columns filled with the soils under initial saturated and air-dried conditions. The leaching of nitrate and DOC was simulated using a one-dimensional advection-dispersion model coupled with the equilibrium and non-equilibrium models. The accuracy of equilibrium without distribution coefficient (KD), equilibrium with KD, one-site, two-site and dual porosity models for modelling the nitrate leaching was 21.8, 33.6, 67.5, 82.2 and 83.9%, respectively, indicating the higher accuracy of dual porosity and two-site models compared to the other models. According to the results of the two-site model, the kinetic release was the most dominant process in all leaching experiments due to the fractions of equilibrium soil sites (F) < 0.5. Vermicompost decreased the diffusion coefficient (D0), distribution coefficient (KD), first-order rate constant (β) and retardation factor (RF). In comparison to the air-dried condition, the initial saturated condition compared to the air-dried condition resulted in less F and D0, higher KD and RF lower β for nitrate and lower KD and RF and higher β for DOC. Leaching using a desaturation flow rate of 0.4 cm3/min was more time-dependent, which reduced RF values from 22.6 to 1.09 and 21.5 to 3.68 for nitrate and DOC, respectively. Moreover, the desaturation flow rate reduced D0 and KD and increased β.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3750-3761"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139650584","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

Effect of EK-PRB application on Cd 'Focusing' effect in soil: PRB applications, replacement of activated carbon and polarity exchange. eb -PRB施用对土壤中Cd“聚焦”效应的影响：PRB施用、活性炭替代和极性交换。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2479161

Sheng Li, Guihong Lan, Qiao Sun, Ming Yue, Weiren Dai, Yanyan Du, Haiyan Qiu, Bo Xu, Keyu Pu

{"title":"Effect of EK-PRB application on Cd 'Focusing' effect in soil: PRB applications, replacement of activated carbon and polarity exchange.","authors":"Sheng Li, Guihong Lan, Qiao Sun, Ming Yue, Weiren Dai, Yanyan Du, Haiyan Qiu, Bo Xu, Keyu Pu","doi":"10.1080/09593330.2025.2479161","DOIUrl":"10.1080/09593330.2025.2479161","url":null,"abstract":"The 'focusing' effect has emerged as a pivotal factor in the elimination of heavy metals from soils by electrokinetic (EK) remediation. The objective of this study was to investigate the effect of activated carbon-filled permeable reactive barrier (PRB) in combination with the EK technique on the 'focusing' effect in Cd-contaminated soil. To this end, five EK experiments were designed for a period of nine days by optimising the layout of PRB, periodic replacement of activated carbon and polarity exchange strategy. The results demonstrated that following a nine-day period of EK remediation, the EK3 experiment, in which the PRB was situated in front of the Cd accumulation section and the activated carbon was replaced at 4.5 days, proved effective in both mitigating and shifting the 'focusing' effect of Cd. Furthermore, the highest average Cd removal efficiency was observed to be 31.66%. Cd was concentrated in S3 and S5, is mainly the more hazardous exchangeable and reducible fractions. In contrast, the Cd removal rate in the areas of S1, S2, and S4 reached 70.72% to 77.07%, with the residual Cd predominantly present in the less hazardous oxidizable and residual fractions. Additionally, the EK3 demonstrated a potential for energy savings of approximately 31.88% compared to EK0. This study offers novel scientific insights into the 'focusing' effect of Cd during soil remediation and provides practical guidance for optimising remediation strategies for heavy metal-contaminated soils.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3859-3869"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729385","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

Migration of heavy metals and microbial metabolic regulation mechanisms in the co-fermentation of coal slime and sawdust. 煤泥与木屑共发酵过程中重金属迁移及微生物代谢调控机制

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2482966

Yongxin Guan, Hongyu Guo, Daping Xia, Yan Liu, Xinggang Wang

{"title":"Migration of heavy metals and microbial metabolic regulation mechanisms in the co-fermentation of coal slime and sawdust.","authors":"Yongxin Guan, Hongyu Guo, Daping Xia, Yan Liu, Xinggang Wang","doi":"10.1080/09593330.2025.2482966","DOIUrl":"10.1080/09593330.2025.2482966","url":null,"abstract":"Heavy metals (HMs) significantly affect the anaerobic fermentation of coal slime (CS), while sawdust serves as a promising substrate for methane bioconversion and an effective adsorbent for HMs. To explore the migration of HMs and improve the conversion efficiency of CS and sawdust to biomethane, experiments were conducted on the co-fermentation of CS and sawdust with different mass ratios. FT-IR, ICP-MS, SEM-EDS, and metagenomic sequencing were employed to elucidate the regulation mechanism of microorganisms after adding sawdust in altering the toxicological environment. The results revealed that the optimum mass ratio of CS to sawdust was 2:1. Oxygen-containing functional groups in CS were removed, and the fatty structure was degraded. Addition of sawdust promoted the further degradation of CS and migration of various HMs. Metal elements such as Fe, Mg, Co, and Cd had also been detected on its surface. Bacillota (39.05%) was significantly enriched, which effectively improved the microbial community structure. The abundance of species with metal detoxification functions increased. The types and abundance of transporters related to toxic metal ions increased in families such as ATP-binding Cassette Superfamily (ABC) and Resistance-Nodulation-Cell Division Superfamily (RND), which would further aid in cellular homeostasis. Moreover, the addition of sawdust promoted the expression of metal resistance genes (MRGs). Multi-MRGs were primarily linked to Cu, As, and Zn, with an increased abundance of bacterial species contributing to key MRGs such as copA, ziaA, and actP. These findings offer valuable insights that support the clean and efficient utilization of CS and sawdust.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3944-3958"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729430","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

Unveiling the adsorption mechanisms and key influencing factors of cyclic acetals on powdered activated carbon. 揭示了环缩醛在粉末活性炭上的吸附机理及主要影响因素。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-18 DOI: 10.1080/09593330.2025.2478182

Qianxi Wu, Tianyang Zhang, Renjie Pan, Zhu Peng, Hengxuan Zhao, Jian Lu, Zhengyu Dong, Chao Zeng, Mohamed Gamal El-Din, Bin Xu

{"title":"Unveiling the adsorption mechanisms and key influencing factors of cyclic acetals on powdered activated carbon.","authors":"Qianxi Wu, Tianyang Zhang, Renjie Pan, Zhu Peng, Hengxuan Zhao, Jian Lu, Zhengyu Dong, Chao Zeng, Mohamed Gamal El-Din, Bin Xu","doi":"10.1080/09593330.2025.2478182","DOIUrl":"10.1080/09593330.2025.2478182","url":null,"abstract":"Cyclic acetals (CAs), such as 2-ethyl-5,5-dimethyl-1,3-dioxane (2-EDD) and 2-ethyl-4-methyl-1,3-dioxolane (2-EMD), are emerging odourants in drinking water, raising significant concerns due to their extremely low odour thresholds, high stability, and potential health risks. This study investigated 2-EDD and 2-EMD adsorption performance on six powdered activated carbons (PACs). The adsorption isotherms fitted well with Freundlich (R2 = 0.907∼0.996) and Temkin models (R2 = 0.874-0.997). The adsorption efficiency of 2-EDD (the Freundlich constant KF = 0.0847-0.802) was higher than 2-EMD (KF = 0.0435-0.239), because of its greater molecular mass and higher hydrophobicity. All PACs reached equilibrium in about 120 minutes, and the adsorption kinetics fitted better with the pseudo-second-order model (R2 = 0.920∼0.997), indicating that chemical adsorption significantly contributed to CAs' adsorption. The adsorption rates for 2-EDD (k2 = 0.123-1.235) were lower compared to 2-EMD (k2 = 0.245-4.770). Results from correlation analysis revealed that average pore size, pore volume, and mesoporous fraction were the key PAC properties in controlling CAs' adsorption. Diffusion-chemisorption model, Weber and Morris intraparticle diffusion kinetic model, and Boyd kinetic model were employed to elucidate the adsorption mechanism. The results indicated that the two CAs were interacted mainly through chemical adsorption, with film diffusion serving as the step controlling the rate. PACs exhibited effective performance under neutral to slightly alkaline conditions, as well as in source water and tap water. Meanwhile, 20 mg·L-1 PAC could reduce CAs' concentration from 40 ng·L-1 to 5 ng·L-1. This study provides a benchmark for selecting effective carbon to address odour issues caused by CAs.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3836-3846"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143656349","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

Treatment of aged leachate by a three-dimensional electrochemical system with biochar as particle electrodes. 以生物炭为颗粒电极的三维电化学系统处理老化渗滤液。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2480320

Fangze Wang, Chengze Ye, Jiayi Wang, Xiangyang Xu

{"title":"Treatment of aged leachate by a three-dimensional electrochemical system with biochar as particle electrodes.","authors":"Fangze Wang, Chengze Ye, Jiayi Wang, Xiangyang Xu","doi":"10.1080/09593330.2025.2480320","DOIUrl":"10.1080/09593330.2025.2480320","url":null,"abstract":"Aged landfill leachate is a type of refractory wastewater containing high concentrations of humic substances and ammonia nitrogen (NH3-N). A new three-dimensional electrocatalytic oxidation (3D-ECO) system was constructed to treat aged leachate using a composite-loaded metal electrode as the anode, a titanium plate as the cathode, and coconut shell biochar (CBC) as particle electrodes. The conditions for the electrochemical reaction were first optimized, and the pollutant removal effects of the two-dimensional (2D) and 3D systems were compared under optimal conditions. Finally, the electrochemical degradation mechanism was analysed. The results showed that when the initial pH was 5, the current density was 30 mA/cm², the particle addition was 7 g/L, and the electrode plate spacing was 4 cm, the pollutant removal efficiency in the leachate was the highest. At then the removal rates of COD and NH3-N were 90.2% and 30.4%, respectively, while under the same conditions, they in the 2D system were only 41.1% and 17.4%, respectively. The introduction of CBC has increased the removal rate of organic pollutants in leachate by 49.1% and reduced energy consumption by 57.2%. Various active substances such as hydrogen peroxide, hydroxyl radicals, and singlet oxygen played a major role in the degradation of leachate pollutants. The synergy between the anode and the third electrode (75%) enhanced the overall effect of electrochemical degradation of organic pollutants in leachate. Therefore, the introduction of CBC can effectively improve the level of pollutant removal, and the 3D-ECO process is a promising technology for treating aged landfill leachate.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3904-3917"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729450","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

Effects of tea polyphenols disinfectant on microbial communities and potential pathogenic bacteria in water. 茶多酚消毒剂对水中微生物群落及潜在致病菌的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-13 DOI: 10.1080/09593330.2025.2478178

Cuimin Feng, Shuaiqi Wang, Ting Wang, Tong Wei, Zexin Chen, Xueqing Jing

{"title":"Effects of tea polyphenols disinfectant on microbial communities and potential pathogenic bacteria in water.","authors":"Cuimin Feng, Shuaiqi Wang, Ting Wang, Tong Wei, Zexin Chen, Xueqing Jing","doi":"10.1080/09593330.2025.2478178","DOIUrl":"10.1080/09593330.2025.2478178","url":null,"abstract":"The structural and abundance changes in water disinfected by tea polyphenols were investigated in high-abundance microbial communities (HAMC), medium-abundance microbial communities (MAMC), and low-abundance microbial communities (LAMC), also included the interactions within and between these communities. The antibacterial effect of tea polyphenols was observed at concentrations of 20-300 mg/L. If the tea polyphenols concentration is greater than or equal to 200 mg/L, it can continue to inhibit the growth of bacteria, and keep the total number of bacteria in 48 hours no more than100 CFU/ml, and this reflected the continuity of tea polyphenols disinfectant in the pipe network. The relative abundance of some chlorine-resistant bacteria such as Blastomonas, Sphingomonas and Pseudomonas decreased significantly after disinfection with tea polyphenols, which indicates that tea polyphenols have the advantage of removing some chlorine-resistant bacteria. Samples of HAMC, MAMC and LAMC showed similar structure. Co-occurrence network analysis within microbial communities revealed the most complex interrelationships in HAMC. Co-occurrence network analysis between microbial communities showed that HAMC and MAMC were most closely related. In the co-occurrence network, 8 key bacteria genera were identified, in which 5 key genera belonged to medium-abundance and low-abundance. Potential pathogens were identified in the study and potential pathogens were Aerococcus and Staphylococcus were pointed out after tea polyphenols disinfection as the key potential pathogen genera by co-occurrence network analysis. The co-occurrence relationship between these key potential pathogens and other potential pathogens indicates that water quality safety can be controlled by the number of key potential pathogens.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3791-3803"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143614072","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

Effect of carbon materials with different nano-iron oxide loadings on aerobic granular sludge systems. 不同纳米氧化铁负载的碳材料对好氧颗粒污泥系统的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-04-21 DOI: 10.1080/09593330.2025.2482078

Kai-Peng Deng, Jun-Guo He, Wei-Xun Jiang, Xin-Ping Liu, Zhi-Han Gong, Yu Zhang, Ya-Qing Xu

{"title":"Effect of carbon materials with different nano-iron oxide loadings on aerobic granular sludge systems.","authors":"Kai-Peng Deng, Jun-Guo He, Wei-Xun Jiang, Xin-Ping Liu, Zhi-Han Gong, Yu Zhang, Ya-Qing Xu","doi":"10.1080/09593330.2025.2482078","DOIUrl":"10.1080/09593330.2025.2482078","url":null,"abstract":"This study investigated iron oxide-loaded powdered activated carbon (FONP-PAC) with varying Fe/C ratios (FC1 in S1, FC2 in S2) in aerobic granular sludge (AGS) systems. S2 achieved the fastest sludge growth, reaching 1106 μm by day 80 (87.14% larger than control S0). During stable operation, S2 exhibited superior pollutant removal: 95.96% COD, 100% NH4+-N, and 79.53% TN removal, alongside the highest aerobic denitrification rate (9.93 mg·gVSS⁻¹·h⁻¹, 71.68% above S0). Comparatively, S1 showed slightly lower efficiencies (94.20% COD, 100% NH4+-N, 71.50% TN) and denitrification activity (8.35 mg·gVSS⁻¹·h⁻¹). Microbial analysis revealed enriched Bacteroidota phyla and sustained Zoogloea genus abundance in FONP-PAC reactors. Higher iron oxide loading enhanced interspecies electron transfer, accelerating granule growth and nitrogen removal. Larger granules in S2 promoted stratified microbial niches, improving oxygen gradient-dependent processes like simultaneous nitrification-denitrification. These findings demonstrate that optimized FONP-PAC dosing strengthens sludge structure and metabolic synergy, achieving dual benefits of rapid granulation and high-efficiency nutrient removal through physicochemical-microbial interactions. The study provides insights into nano-material mediated AGS enhancement for wastewater treatment optimization.HighlightsThe threshold effect of nano-iron oxide loading on the granulation rate of AGS (Anaerobic Granular Sludge) was revealed.The mechanism by which FONP-PAC (Functionalized Oxide Nanoparticles-Polymeric Aluminum Chloride) promotes interspecies electron transfer through a conductive network was elucidatedA strategy for the targeted enrichment of Thauera and Zoogloea by the material was proposed.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3918-3929"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143984589","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

Immobilisation of endogenous phosphorus and lead in sediments by composite water purification sludge hydrochar. 复合水净化污泥烃类固定化沉积物中内源磷和铅的研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2482969

Ying Liu, Liwenze He, Yu Chen, Jingxiang Tang, Haiquan Li, Yanxia Liu

{"title":"Immobilisation of endogenous phosphorus and lead in sediments by composite water purification sludge hydrochar.","authors":"Ying Liu, Liwenze He, Yu Chen, Jingxiang Tang, Haiquan Li, Yanxia Liu","doi":"10.1080/09593330.2025.2482969","DOIUrl":"10.1080/09593330.2025.2482969","url":null,"abstract":"Sediment is a critical component of aquatic ecosystems, that acts as a natural sink for diverse pollutants such as heavy metals and phosphorus (P). However, the current research on sediment remediation has predominantly focused on single contaminants. In this study, a novel composite material, calcium peroxide/lanthanum-loaded hydrochar (CaO2-LaHyd), was synthesised through the hydrothermal carbonisation of water purification sludge, followed by the sequential loading of lanthanum ions and nano-calcium peroxide. The adsorption capacities of CaO2-LaHyd for P and Pb were evaluated via adsorption experiments, and their passivation mechanisms were investigated through sediment capping simulations. Materials were characterised using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and energy-dispersive spectroscopy. Results indicated that CaO2-LaHyd exhibited maximum adsorption capacities of 66.05 mg·g⁻¹ for P and 230.41 mg·g⁻¹ for Pb. In the simulated capping experiments, the addition of 5% CaO2-LaHyd significantly reduced the phosphate concentrations in the overlying water. The slow release of oxygen from calcium peroxide improves sediment redox conditions, suppresses endogenous P release, and decreases interstitial P levels. Speciation analysis revealed that CaO2-LaHyd promoted the endogenous P transformation into stable forms while reducing the bioavailable P fractions. Concurrently, it enhanced Pb passivation, thereby mitigating Pb leaching risks from the sediment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3959-3972"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729377","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