Environmental Technology最新文献

{"title":"Effect of hydrochar from sludge mixed with coffee grounds on the immobilization of Cu, Cr and Ni in soil.","authors":"Jingxiang Tang, Yu Chen, Liwenze He, Yanjun Li, Haiquan Li, Fei Sun, Ying Liu","doi":"10.1080/09593330.2024.2391077","DOIUrl":"10.1080/09593330.2024.2391077","url":null,"abstract":"<p><p>In this study, hydrochars were prepared at varying temperatures with distinct mixing ratio, and then the hydrochars were characterized and evaluated for heavy metals to ascertain its potential as a soil conditioner. The application of elevated temperatures resulted in a reduction in the yield of hydrochars, whereas the incorporation of coffee grounds led to an increase in the yield. The blended hydrochar displays elevated ash, fixed carbon, and diminished H/C, O/C, and (O + N)/C ratios, indicating enhanced stability in soil treatment and potential for enhanced soil fertility. The application of hydrothermal carbonization facilitated the stabilization of heavy metals within the sewage sludge, with the stabilizing effect being enhanced by the addition of coffee grounds. Following the application of SCC as a soil conditioner to the heavy metal-contaminated soil for a period of 90 days, it was observed that the heavy metals Cu, Cr, and Ni present in the contaminated soil underwent a transition from an unstable to a stable speciation. Of the treatments tested, AK15 was identified as the most effective, demonstrating a significant reduction in the risk of leaching and biotoxicity associated with Cu, Cr, and Ni in the contaminated soil.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1573-1585"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141975372","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":"Mitigating arsenic accumulation in rice plant in paddy soil: influence of persulphate and ferrous application.","authors":"Jianqiang Zhang, Zhiliang Chen, Qi Zou, Zihan Zeng, Menqiang Sun, Hang Wei","doi":"10.1080/09593330.2024.2405661","DOIUrl":"10.1080/09593330.2024.2405661","url":null,"abstract":"<p><p>Rice cultivation under flooded conditions usually leads to a high accumulation of arsenic (As) in grains. Sulphur and iron played vital roles in affecting the bioavailability of As in the soil-rice system. Herein, using pot experiments, we investigated the effects of persulphate (PS) and ferrous (Fe²⁺) on the transfer and accumulation of As in the soil-rice system under flooded conditions. The concentration of As and Fe in soil porewater declined with continuous flooding. Persulphate/ferrous addition significantly inhibited the formation of iron plaque and the transfer of As to the aboveground tissues of rice. The total As, dimethylarsinicacid (DMA), As (III), and As (V) in grains significantly decreased by 49∼75%, 60∼89%, 20∼24%, and 35∼36%, respectively, by persulphate/ferrous application. Furthermore, a decrease of As in husk, leaf, and, stem was also found in persulphate and ferrous treatment. To some degree, the Fe²⁺ can facilitate the decreased efficiency of As accumulation and translocation in rice tissue. The present study's results demonstrated that applying persulphate/Fe²⁺ could effectively alleviate the excessive accumulation of As in rice grains in the soil-rice system under flooding conditions.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1779-1790"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344175","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":"Bifunctional system constructed by NiCu-F/DSA electrode self-coupling for efficient removal of ammonia nitrogen from landfill leachate.","authors":"Bing Li, Xing Tong, Hailong Wang, Luanqi Zhou, Qiming Li, Na Yao, Meng Zhang, Huimin Zhang","doi":"10.1080/09593330.2024.2415724","DOIUrl":"10.1080/09593330.2024.2415724","url":null,"abstract":"<p><p>Landfill leachates containing high concentrations of ammonia nitrogen, due to its strong toxicity, large discharge and great environmental hazard, is in urgent need of efficient cleaning treatment. In this work, Ni₁Cu_0.25-F/DSA catalytic electrode was prepared via electrodeposition by means of fluorination-induced surface reconstruction. The surface of electrode was determined to be a porous sponge-like structure by physical characterizations. The electrode exhibited a superior ammonia oxidation reaction (AOR) activity and stability by a series of electrochemical tests. On this basis, a Ni₁Cu_0.25-F/DSA || Ni₁Cu_0.25-F/DSA bifunctional system was developed for efficient removal of ammonia nitrogen in landfill leachate. The results of denitrification experiment indicated that the removal efficiency of NH₄⁺-N and TN were 99.89% and 68.9%, respectively, when the electrolytic cell potential was 1.7 V, pH was 13 and the initial ammonia concentration was 600 mg L^-1. The NH₄⁺-N removal efficiency remained above 95% after the cyclic denitrification experiment lasting for 6 days, which validates the robust stability of the electrode.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1996-2010"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142461175","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":"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 SO₂ 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 SO₂ 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 SO₂ 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}

{"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 NH₄⁺-N and NO₃^--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>ΔG⁰</i><0, <i>ΔH⁰</i>>0, Δ<i>S</i>⁰<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 NH₄⁺-N and NO₃^--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 NH₄⁺-N and NO₃^--N. The saturated CTS/ZMS composites regenerated by first 1 mol/L NaCl solution, followed by 1 mol/L Na₂CO₃ 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}

{"title":"Iota-carrageenan as a regenerating system for Eu³⁺ 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 (Eu³⁺) 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 Eu³⁺ ion solution with beads that were prepared with 1 or 2 wt/v% aqueous solution of iota-carrageenan with CaCl₂ (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 NaNO₃ (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 Eu³⁺ ions to and from the iota beads and that the Ca²⁺ ions that initially crosslinked the hydrogel were replaced during the cycles by Eu³⁺ or Na⁺ 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}

{"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^-1 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/m³ and a total expense of 8.7 $/m³ 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}

{"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}

{"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^- gC^-1 and EDC values from 111.17-229.33 μmol e^- gC^-1. 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}