Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-10-03DOI: 10.1080/09593330.2024.2385066
Rodolphe Vautherin, Hélène Métivier, Anne Reguer, Hassen Benbelkacem
{"title":"Innovative process for sulphur recovery from waste incineration flue gases: production of marketable sodium bisulphite solution.","authors":"Rodolphe Vautherin, Hélène Métivier, Anne Reguer, Hassen Benbelkacem","doi":"10.1080/09593330.2024.2385066","DOIUrl":"10.1080/09593330.2024.2385066","url":null,"abstract":"<p><p>This study presents an innovative process for recovering sulphur from hazardous waste incineration flue gases, designed to produce a marketable sodium bisulphite solution while ensuring complete SO<sub>2</sub> removal. This new process is characterized by a double absorption strategy at two different pH levels. The first step, at an acidic pH, generates the desired bisulphite solution, while the second step, at a basic pH, produces the sulphite solution for recycling into the first step and ensures total SO<sub>2</sub> removal. The process's performance and feasibility were evaluated on a laboratory scale using a batch reactor with synthetic gas. The parametric study focused on the initial sulphite concentration in the absorption solution and the reactor temperature. A removal efficiency exceeding 95% was achieved across all initial sulphite concentrations and temperature ranges, when the pH was maintained above 6. At pH 5, where bisulphites are the predominant sulphur species, the removal efficiency remained substantial at approximately 70%. The oxidation of sulphites/bisulphites by oxygen in the flue gases was minimal, with less than 5% conversion to sulphate. Additionally, pH-controlled experiments were conducted to optimize plant start-up procedures. For the basic reactor, starting with water and adjusting the pH to 8 during SO<sub>2</sub> absorption effectively minimized sodium hydroxide consumption. In contrast, for the acidic reactor at pH 5, initiating the process with a concentrated sulphite solution resulted in more stable absorption rates. These findings underscore the process's potential for efficient sulphur recovery and highlight the importance of pH management in optimizing operational stability and chemical consumption.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1321-1332"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142364861","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":"Emulsion liquid membrane technique for optimal separation of Ni (II) and Sm (III) using response surface methodology and Box-Behnken experimental setup.","authors":"Benderrag Abdelkader, Benabela Imene, Annag Lahouaria, Haddou Boumediene, Kameche Mostefa, Maschke Ulrich","doi":"10.1080/09593330.2024.2386865","DOIUrl":"10.1080/09593330.2024.2386865","url":null,"abstract":"<p><p>This study evaluated the reliability of the emulsified liquid membrane (ELM) extraction technique for recovering and separating metals, focusing on Nickel (Ni(II)) and Samarium (Sm(III)), both used in electrochemical devices. Key contributions include determining optimal conditions for creating a stable water-in-oil (W/O) emulsion. The optimal conditions were found to be a 5-minute emulsification time, 4 wt.% Span 80 surfactant concentration, a 1.6 volume ratio of the internal phase to the organic phase, 1 M H2SO4 concentration for the internal phase, a 40/160 volume ratio of the emulsion to the external phase, and kerosene as the diluent. Factors affecting the separation of Ni(II) and Sm(III) included the concentrations of the internal aqueous phase, surfactant, and extractant. Under these conditions, an equimolar mixture of Ni(II) and Sm(III) was extracted within 15 min. The study emphasized the importance of phase volume ratio and surfactant concentration for emulsion stability and extraction efficiency. The response surface method (RSM) and Box-Behnken design were used to optimize influential factors, with a modified quadratic model predicting extraction yields of 83.81% for Sm(III) and 15% for Ni(II). The study demonstrates that effective separation of Ni(II) and Sm(III) ions is achievable using this technique, providing valuable insights into efficient and selective metal ion extraction, contributing to the broader field of metal recovery and recycling technologies.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1348-1368"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142072401","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-09-05DOI: 10.1080/09593330.2024.2397737
Yingjie Luo, Shui Liu, Junying Shi, Song Xu, Yunan Gao
{"title":"A new particle material (CTS/ZMS) for removing ammonia and nitrate from groundwater: performance and regeneration.","authors":"Yingjie Luo, Shui Liu, Junying Shi, Song Xu, Yunan Gao","doi":"10.1080/09593330.2024.2397737","DOIUrl":"10.1080/09593330.2024.2397737","url":null,"abstract":"<p><p>A new type of particle material modified zeolite molecular sieve (CTS/ZMS) is developed for the simultaneous removal of NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup>-N in groundwater. To ascertain the optimal performance of CTS/ZMS, a custom central composite design (CCD) was utilised to assess the operational parameters (dosage and contact time) of CTS/ZMS composites. Batch experiments were carried out to determine the removal efficiency and adsorption capacity across varying pH values (3-12) and temperatures (5 °C to 30 °C). The results of response surface three-dimensional analysis showed the removal efficiencies of nitrate and ammonium ions are the highest at a dosage of 5.5 g/L of CTS/ZMS adsorbents and adsorption time of 6.25 h and are respectively observed to be 40%, and 80.2%. Adsorption thermodynamic analysis (<i>ΔG<sup>0</sup></i><0, <i>ΔH<sup>0</sup></i>>0, Δ<i>S</i><sup>0</sup><i>>0</i>) revealed ammonia and nitrate adsorption on CTS/ZMS composites are spontaneous and feasible at high temperatures. SEM, EDS, BET, FTIR and XPS were employed for analyzing the adsorption mechanism of CTS/ZMS for NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup>-N and included mostly ion exchange, electrostatic interaction, and hydrogen bonding. Different regeneration methods including water regeneration, thermal regeneration, and chemical regeneration for CTS/ZMS composites were analyzed to evaluate the removal efficiency of NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup>-N. The saturated CTS/ZMS composites regenerated by first 1 mol/L NaCl solution, followed by 1 mol/L Na<sub>2</sub>CO<sub>3</sub> solution demonstrated the highest ammonia and nitrate removal efficiency. The experimental data indicated pseudo-second-order kinetic model and the Freundlich model explained well the ammonia and nitrate adsorption process of regenerated CTS/ZMS composites. According to the Langmuir model, the regenerated CTS/ZMS can adsorb a maximum of 0.92 mg/g of ammonia and 1.98 mg/g of nitrate. The results demonstrate that CTS/ZMS composites serve as a potentially efficient adsorbent for removing ammonia and ions from groundwater. This study offers technical guidelines and support for the future production and application of CTS/ZMS.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1648-1665"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142132210","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-09-19DOI: 10.1080/09593330.2024.2404646
Oshrat Levy-Ontman, Shir Nagar, Ofra Paz-Tal, Adi Wolfson
{"title":"Iota-carrageenan as a regenerating system for Eu<sup>3+</sup> recovery: adsorption/desorption cycles.","authors":"Oshrat Levy-Ontman, Shir Nagar, Ofra Paz-Tal, Adi Wolfson","doi":"10.1080/09593330.2024.2404646","DOIUrl":"10.1080/09593330.2024.2404646","url":null,"abstract":"<p><p>Renewable and biodegradable polysaccharides attract attention as environmentally friendly adsorbents for the removal of heavy metals from wastewater. One such group, is carrageenan, of which were recently successfully employed to adsorb representative lanthanide and actinide ions. Herein, iota-carrageenan-based hydrogels were used to adsorb europium ions (Eu<sup>3+</sup>) from water solutions, followed by desorption of the ions from the hydrogel beads and recycling of the beads three times. It was found that sorption yields from a 500 mg/L Eu<sup>3+</sup> ion solution with beads that were prepared with 1 or 2 wt/v% aqueous solution of iota-carrageenan with CaCl<sub>2</sub> (0.5 M) reached maximum sorption yield of 50% and 65%, correspondingly, after 1 h. In addition, the sorption kinetics followed the pseudo second-order model controlled by chemisorption. Desorption yields in the first cycle using NaNO<sub>3</sub> (1 M) with both preparations were 57% and 74%, respectively. The sorption yields increased during the second and third cycles and were efficient in the overall pH range. Cryo-SEM, SEM, SEM-EDS and TGA analyses verified the adsorption and desorption of Eu<sup>3+</sup> ions to and from the iota beads and that the Ca<sup>2+</sup> ions that initially crosslinked the hydrogel were replaced during the cycles by Eu<sup>3+</sup> or Na<sup>+</sup> ions. In addition, the beads were stable and easily reusable for several sorption/desorption cycles. Furthermore, after sorption, the beads were characterised by a porous structure, such that beads prepared with a 2 wt/v% aqueous solution of iota-carrageenan yielded a more porous, ordered structure, and after desorption, the bead textures became even more porous.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1730-1743"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142282401","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-08-19DOI: 10.1080/09593330.2024.2391075
Huiyang Liu, Jianfeng Yu
{"title":"Ozonation degradation of wastewater using rotational hydrodynamic cavitation reactor with a conical rotor.","authors":"Huiyang Liu, Jianfeng Yu","doi":"10.1080/09593330.2024.2391075","DOIUrl":"10.1080/09593330.2024.2391075","url":null,"abstract":"<p><p>Water pollution caused by an abusive discharge of dye-containing wastewater leads to serious ecological risks. Conventional wastewater treatment methods have shortcomings of incomplete degradation, long-time treatment and secondary pollution. For the first time, a rotational hydrodynamic cavitation reactor (RHCR) equipped with a conical rotor has been designed to enhance the ozonation process for effective degradation of pollutants. The effects of rotational speed, discharge voltage, gas flow rate, liquid flow rate and initial pH on methylene blue (MB) degradation were deeply investigated. The optimised conditions were initial pH = 9, rotational speed = 1800 rpm, discharge voltage = 9.3 kV, gas flow rate = 60 mL/min and liquid flow rate = 80 mL/min. With the integration of ozonation and cavitation in RHCR, the MB degradation efficiency reached 95.2%, which was 15.6% higher than that of the individual ozonation method. The degradation process was proven to track the first-order kinetic model, with the reaction rate and synergy index were 0.232 min<sup>-1</sup> and 1.78, respectively. Through the quenching experiments, it can be confirmed that the contribution proportion of hydroxyl radical during degradation was increased by 8.7% due to the enhancement of cavitation. A required energy consumption of 74.7 kWh/order/m<sup>3</sup> and a total expense of 8.7 $/m<sup>3</sup> were calculated. The energy consumption of the RHCR was approximately 80% lower than that of the recently reported degradation system combining ozonation and cavitation, with total expense reduced by 52%. The findings of this work provide a new water treatment method and offered theoretical references for the design of RHCR.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1545-1560"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141999702","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-09-26DOI: 10.1080/09593330.2024.2406989
Jucélia T Ferreira, Fernanda M Amaral, Ana Christina Brasileiro-Vidal, Raquel P Bezerra, Albean S C Bezerra, Fabricio Motteran, Mário T Kato, Lourdinha Florencio, Osmar Menezes, Sávia Gavazza
{"title":"Evaluating the removal of the tetra-azo dye direct black-22 in <i>Chlorella vulgaris</i> closed-cultivation systems.","authors":"Jucélia T Ferreira, Fernanda M Amaral, Ana Christina Brasileiro-Vidal, Raquel P Bezerra, Albean S C Bezerra, Fabricio Motteran, Mário T Kato, Lourdinha Florencio, Osmar Menezes, Sávia Gavazza","doi":"10.1080/09593330.2024.2406989","DOIUrl":"10.1080/09593330.2024.2406989","url":null,"abstract":"<p><p>The removal of the tetra-azo dye Direct Black 22 (DB22) using the microalga <i>Chlorella vulgaris</i> was evaluated in the present study, aiming to understand the contribution of different processes (biodegradation, photodegradation, and adsorption) in the removal of this contaminant. The growth and morphological characteristics of <i>C. vulgaris</i> were not affected by the presence of the dye in the reaction medium. The efficiency of dye removal was 62.6 ± 1.46%, 47.7 ± 7.2% of which was attributed to photodegradation, while 13.2 ± 6.5% were associated with the contribution of the microalga by an enzymatic route and 1.7 ± 9.6% with an adsorption process. Additionally, tests with the organism <i>Allium cepa</i> as a bioindicator revealed that DB22 and its byproducts did not induce toxicity, but cytotoxicity and genotoxicity were induced. We observed that genotoxicity was reduced after the remediation process. Our results establish photodegradation as the primary mechanism and biodegradation as the secondary mechanism driving the removal of DB22 within a <i>Chlorella</i> culture. Researchers must carefully consider all aspects involved in the removal process, including photodegradation, biodegradation, and adsorption processes.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1883-1891"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344074","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-08-11DOI: 10.1080/09593330.2024.2388313
Yin Mengmeng, Shi Yongxing, Kong Linggang, Liu Jiachen
{"title":"Study on the effect of volatile organic compounds on the treatment of high-salt wastewater by low-temperature evaporation.","authors":"Yin Mengmeng, Shi Yongxing, Kong Linggang, Liu Jiachen","doi":"10.1080/09593330.2024.2388313","DOIUrl":"10.1080/09593330.2024.2388313","url":null,"abstract":"<p><p>High-salinity wastewater, owing to its intricate composition and challenging treatment requirements, poses a significant hurdle in water environmental governance. In this study, low-temperature evaporation technology is used to tackle wastewater containing the volatile organic compound such as N,N-dimethylacetamide (DMAC). Utilisation of comprehensive approaches involving experimental testing, mathematical modelling, and Aspen Plus software simulations, The influence of DMAC on evaporation efficiency is researched through the following factors which encompassing its effects on boiling point elevation, partial molar activation energy, and the formation of by-products. Additionally, the comparation of the impact of temperature, ionic strength, intermolecular interactions on the evaporation rate and the concentration of the volatile component DMAC in the condensate is also conducted in this study. After conducting a multiple linear regression analysis of evaporation efficiency using the Statistical Product and Service Solutions (SPSS) tool, it was discovered that temperature serves as the primary determinant influencing the evaporation rate. Additionally, ionic strength impacts solution viscosity, intermolecular interactions, and saturated vapour pressure by altering the intermolecular forces, thereby indirectly influencing both the evaporation rate and the quality of condensate water. The comparative analysis of single-effect and double-effect evaporation indicates that the optimal operating condition for double-effect evaporation yields an evaporation rate of 70%, with a remarkable 88% reduction in steam consumption compared to single one. Based on heat and mass balance principles, the mathematical model for double-effect evaporation is established to offer crucial data support for practical industrial applications.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1384-1401"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141916478","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}
Environmental TechnologyPub Date : 2025-04-01Epub Date: 2024-09-21DOI: 10.1080/09593330.2024.2405662
Yue Yang, Xiaoli Zhou, Zixun Zhou, Xiujuan Qian, Jie Zhou, Minjiao Chen, Weiliang Dong, Min Jiang
{"title":"The effect of low-temperature plasma pretreatment on the biodegradability of polyethylene films.","authors":"Yue Yang, Xiaoli Zhou, Zixun Zhou, Xiujuan Qian, Jie Zhou, Minjiao Chen, Weiliang Dong, Min Jiang","doi":"10.1080/09593330.2024.2405662","DOIUrl":"10.1080/09593330.2024.2405662","url":null,"abstract":"<p><p>With the increasing focus on environmental friendliness and sustainable development, extensive research has been conducted on the biodegradation of plastics. The non-hydrolyzable, highly hydrophobic, and high-molecular-weight properties of polyethylene (PE) pose challenges for cell interaction and biodegradation of PE substrates. To overcome these obstacles, PE films were treated with low-temperature plasma before biodegradation. The morphology, surface chemistry, molecular weight, and weight loss of PE films after plasma treatment and biodegradation were studied. The plasma treatment decreased the surface water contact angle, formed C-O and C = O groups, and decreased the molecular weight of PE films. With the increased pretreatment time, the biodegradation efficiency rose to 2.6% from 0.63% after 20 days of incubation. The mechanism was proposed that the surface oxygen-containing groups formed by plasma treatment can facilitate the bio-accessibility and be further decomposed and utilised by the microbes. This study provided an effective and rapid pretreatment strategy for improving biodegradation of PE.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1791-1803"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142282403","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":"Comparative analysis and application of soft sensor models in domestic wastewater treatment for advancing sustainability.","authors":"Cheng Qiu, Fang-Qian Huang, Yu-Jie Zhong, Ju-Zhen Wu, Qiang-Lin Li, Chun-Hong Zhan, Yu-Fan Zhang, Liting Wang","doi":"10.1080/09593330.2024.2415722","DOIUrl":"10.1080/09593330.2024.2415722","url":null,"abstract":"<p><p>This study focuses on the development and evaluation of soft sensor models for predicting NH<sub>3</sub>-N values in a wastewater treatment process. The study compares the performance of linear regression (LR), neural networks (NN) and random forest regression (RFR) models. The proposed methodology involves optimizing the sequencing batch reactor process using artificial intelligence and an automatic control system. Real-time NH<sub>3</sub>-N values are obtained by inputting data from electronic conductivity and temperature sensors into the prediction models. Once the predicted NH<sub>3</sub>-N value falls below the effluent standard, the cycle ends, improving energy efficiency and sustainability by cutting down the agitator and aerator. The research results demonstrate that the RNN-based NH<sub>3</sub>-N soft sensor built in this study exhibits the best performance, which is promising for wastewater treatment process optimization and evaluation. The results show that sensor model NNR<sub>[0.5Y]H</sub> exhibits exceptional performance, utilizing recurrent neural network with 5-step input delays. Sensor NN<sub>R[0.5Y]H</sub> exhibits an R<sup>2</sup> of 0.921, an RMSE of 6.110, and an MAE of 4.558. Based on the findings, recurrent neural network (RNN) variants emerge as the most effective modeling technique due to their ability to capture temporal dependencies and handle variable-length sequences. This study provides satisfied performance results for the NNR<sub>[0.5Y]H</sub> soft sensor model in NH<sub>3</sub>-N monitoring and process optimization in wastewater treatment, highlighting the effectiveness of recurrent neural networks and their contribution to improving interpretability, accuracy, and adaptability of soft sensor models.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1959-1980"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497502","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 evolution of structural characteristics and redox properties of humin during the composting of sludge and corn straw.","authors":"Haoyu Chang, Xiaojie Sun, Hongxia Zhang, Zhihan Tan, Beidou Xi, Meiyan Xing, Bin Dong, Hongxiang Zhu","doi":"10.1080/09593330.2024.2397589","DOIUrl":"10.1080/09593330.2024.2397589","url":null,"abstract":"<p><p>Humins (HMs), the insoluble faction of humic substances (HSs), play a pivotal role in the bioremediation of pollutants by acting as electron shuttles that modulate the interactions between microorganisms and pollutants. This crucial function is intricately linked to their structural composition and electron transfer capabilities. However, the dynamics of the electron transfer capacity (ETC) of HM extracted during the composting process and its determinants have yet to be fully elucidated. This study undertakes a comprehensive analysis of the ETC of HM derived from composting, employing electrochemical techniques alongside spectroscopic methods and elemental analysis to explore the influencing factors, including the electron accepting capacity (EAC), electron donating capacity (EDC), and electron reversible rate (ERR). Our findings reveal substantial variations in the EAC and EDC of HM throughout the composting process, with EAC values ranging from 133.03-220.98 μmol e<sup>-</sup> gC<sup>-1</sup> and EDC values from 111.17-229.33 μmol e<sup>-</sup> gC<sup>-1</sup>. Notably, the composting process enhances the ERR and EDC of HM while diminishing their EAC. This shift is accompanied by an augmented presence of aromatic structures, polar functional groups, quinones, and nitrogen - and sulfur-containing moieties, thereby boosting the HM's EDC. Conversely, the reduction in EAC is associated with a decline in lignin carbon content and the abundance of oxygen-containing moieties, as well as the diminishment of visible fulvic-like and protein-like substances within HM. Importantly, humic-like substances and nitrogen-containing moieties within HM demonstrated the capacity for repeated electron transfer, underscoring their significance in the context of environmental remediation.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1636-1647"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105807","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}