Water-Energy Nexus最新文献_第8页

Validation of biphenyl degradation pathway by polymerase chain reaction, peptide mass fingerprinting and enzyme analysis 用聚合酶链反应、肽质量指纹图谱和酶分析验证联苯降解途径

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.04.001

Young-Cheol Chang , Hideto Sugawara , M. Venkateswar Reddy

{"title":"Validation of biphenyl degradation pathway by polymerase chain reaction, peptide mass fingerprinting and enzyme analysis","authors":"Young-Cheol Chang , Hideto Sugawara , M. Venkateswar Reddy","doi":"10.1016/j.wen.2021.04.001","DOIUrl":"10.1016/j.wen.2021.04.001","url":null,"abstract":"<div>Our previous studies showed, bacterium Aquamicrobium sp. SK-2 could degrade biphenyl and polychlorinated biphenyls (PCBs). In the present study, proteins involved in the biphenyl degradation was evaluated using various molecular biology methods. The gene bphC present in the strain SK-2 was identified using the polymerase chain reaction method. Further the key enzyme in biphenyl degradation, 2,3-dihydroxybiphenyl 1,2-dioxygenase (BphC) was purified through anion exchange and gel filtration chromatography, subsequently the enzyme activity was measured. The N-terminal amino acid sequence of the purified enzyme showed 92% homology with BphC enzyme of Gram-negative bacteria (Pseudomonas sp. KKS102, Comamonas testosterone, Burkholderiaceae bacterium, Delftia acidovorans, and Achromobacter denitrificans). Fractions collected during protein purification were applied on SDS-PAGE gel. Significant bands were selected in SDS-PAGE gel, and the gel pieces were cut out to analyze the proteins using peptide mass fingerprinting (PMF) method. PMF method provided useful information about the proteins involved in biphenyl degradation. Apart from BphC, two other enzymes, benzoate dioxygenase and catechol 2,3-dioxygenase which were involved in biphenyl degradation process were identified. The results indicate that catechol can be degraded to 2-hydroxymuconic-semialdehyde and this result is in accordance with the results from our previous study. Based on all these results we can conclude that the strain SK-2 is a potential candidate for the bioremediation of biphenyl contaminated places.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 69-75"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.04.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89832811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of climatic change and database information design on the water-energy-food nexus in water-scarce regions 气候变化对缺水地区水-能-粮关系的影响及数据库信息设计

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.03.002

Alaba Boluwade

{"title":"Impacts of climatic change and database information design on the water-energy-food nexus in water-scarce regions","authors":"Alaba Boluwade","doi":"10.1016/j.wen.2021.03.002","DOIUrl":"10.1016/j.wen.2021.03.002","url":null,"abstract":"<div>The objective of this paper was three-fold. The paper highlights the synergies and tradeoffs in the interconnectedness of water-energy-food (WEF) for the agricultural corridor of North-South Al-Batinah, Sultanate of Oman. The study further evaluates the impacts of climate change on the WEF nexus. The results show that by 2099, Al-Batinah’s mean temperature will range from 2.0 to 3.5 °C and 1.0 to 2.5 °C for RCP8.5 and RCP4.5 scenarios, respectively, when compared to 1986–2005 historical simulations. From a precipitation standpoint, the analysis showed drier January and February months with significant heavy precipitation events in March for both scenarios when compared with the historical simulations. Thus, the significance and findings of this study further indicate there will be a persistent reduction in water availability which can affect crop yield. The excess wetness in March can lead to extreme climatic events such as flooding and inundation of farmlands. These impacts can trickle down to affect other links in the nexus such as the energy and food supply as well as Tanfeedh plans for economic diversification in agriculture and fisheries proposed by the central government. The study also recognizes the importance of data gaps and various sources of available data that could be integrated for improved planning and decision making. Therefore, a database system using the Unified Model Language was proposed. This platform, when implemented, will help Oman’s efforts in the next decade in strengthening the links between the WEF nexus, meeting the nexus’s demands as a result of climate change, population growth, etc., and also achieving sustainable development goals.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 54-68"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.03.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82835081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

SWAT and HBV models’ response to streamflow estimation in the upper Blue Nile Basin, Ethiopia SWAT和HBV模型对埃塞俄比亚青尼罗河上游流域流量估算的响应

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.03.001

Belay B. Bizuneh , Mamaru A. Moges , Berhanu G. Sinshaw , Mulu S. Kerebih

{"title":"SWAT and HBV models’ response to streamflow estimation in the upper Blue Nile Basin, Ethiopia","authors":"Belay B. Bizuneh , Mamaru A. Moges , Berhanu G. Sinshaw , Mulu S. Kerebih","doi":"10.1016/j.wen.2021.03.001","DOIUrl":"10.1016/j.wen.2021.03.001","url":null,"abstract":"<div>The study aimed to evaluate the SWAT and HBV model’s responses to estimate streamflow in three typical selected watersheds in the upper Blue Nile Basin, Ethiopia. The evaluation was carried out through simulation of runoff in three watersheds, namely: Gilgel Abay, Anger, and Maybar located in the upper Blue Nile Basin, Ethiopia. The same calibration and validation period were applied for each watershed model with their respective historical records. The objective function indicates the optimized range of model parameters during the calibration and validation procedure, and it gives a good model response result, which is determined by the recommended performance indicators and hydrograph plots. The HBV and SWAT model’s calibration responds with (NSE = 0.81, NSE = 0.48 and NSE = 0.46) and (NSE = 0.81, NSE = 0.63, NSE = 0.61), respectively for Gilgel Abay, Anger, and Maybar watersheds. The optimized parameters were applied to validate the model using independent historical data. The SWAT and HBV model responses for NSE during the validation period were 0.8, 0.55, and 0.54 and 0.63, 0.45, and 0.34, respectively, for Gilgel Abay, Anger, and Maybe watersheds. An alternative was observed to over and under estimate runoff during stimulation periods in extreme wet and dry periods. Generally, the calibrated and validated hydrograph output result indicates that the model’s responses to too wet and dry conditions were not satisfactory. Therefore, further model refinements for extreme events, including season-based model evaluations that could improve the process representation of rainfall-runoff events, are recommended.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 41-53"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78305602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Fenton-like oxidation of phenol with in-situ generated hydrogen peroxide and Pd/Fe-zeolite catalysts 原位生成过氧化氢和Pd/ fe分子筛催化剂对苯酚类fenton氧化的影响

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.06.001

Shailesh S. Sable , Anett Georgi , Sandra Contreras , Francesc Medina

{"title":"Fenton-like oxidation of phenol with in-situ generated hydrogen peroxide and Pd/Fe-zeolite catalysts","authors":"Shailesh S. Sable , Anett Georgi , Sandra Contreras , Francesc Medina","doi":"10.1016/j.wen.2021.06.001","DOIUrl":"10.1016/j.wen.2021.06.001","url":null,"abstract":"<div>Two types of iron-containing zeolites with different surface hydrophobicity, Fe-ZSM5 (SiO2/Al2O3 = 26) and Fe-ZSM5 (SiO2/Al2O3 = 236) were studied as adsorbents and catalysts for oxidation of phenol by means of a Fenton-like process at ambient conditions and nearly neutral pH, with and without in-situ generation of H2O2. Adsorption of phenol is more favorable on high silica Fe-ZSM5 (236) zeolite due to its higher surface hydrophobicity. Palladium (Pd) immobilization on Fe-ZSM5 zeolites has a positive impact on phenol degradation with a synergistic role of Pd and Fe (II)/(III) for activation of H2O2. The best result for phenol conversion and mineralization was observed over both hydrophilic and hydrophobic 0.1 wt.% Pd/Fe-ZSM5 with commercial H2O2 achieving ≥ 90% conversion of phenol (100 mg/L) in 4 h and 60–63% mineralization in 6 h with 5 g/L catalyst and 5 g/L H2O2. In addition, Pd/Fe-ZSM5 can be used for in-situ formation of H2O2 using formic acid as H-source and externally supplied oxygen. The combination of these processes provided by this adsorbent/catalyst material is exploitable for on-site oxidative regeneration of zeolite adsorbents. This study shows that Fe-containing zeolites are promising catalysts for a combined approach of adsorption/oxidative degradation of phenol by commercial or in-situ produced H2O2.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 95-102"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81211214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

How the Sponge City becomes a supplementary water supply infrastructure 海绵城市如何成为配套的供水基础设施

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.02.002

Stephan Köster

{"title":"How the Sponge City becomes a supplementary water supply infrastructure","authors":"Stephan Köster","doi":"10.1016/j.wen.2021.02.002","DOIUrl":"10.1016/j.wen.2021.02.002","url":null,"abstract":"<div>While in today’s Sponge Cities flood control works effectively, the sponge-based rainwater harvesting is associated with substantial challenges. In addition to water management, the pollution of collected stormwater counts as one of the major barriers for urban water augmentation. The aim of this communication is to outline how this constraint can be overcome and how the water service portfolio of the Sponge City can successfully undergo feasible expansion considering technical and also economic aspects. Innovative engineered solutions for a sponge-based rainwater harvesting are the key to an adaptive and flexible water supply infrastructure for Sponge Cities especially to preserve its manifold urban water and life quality services. The complementary water service, emerged from the Sponge City, can provide an imperative contribution to compensate the high capital investments and to cover the operation and maintenance costs. This enables a tremendous funding opportunities that can be invested for the preservation of the blue-green future city. Moreover, this would offer a feasible way of urban water service development over the negative impacts caused by climate change.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 35-40"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.02.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87524673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Effect of sound waves and inclination of membrane on the performance of the osmotic microbial fuel cell 声波和膜倾角对渗透微生物燃料电池性能的影响

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.07.003

Mandar S. Bhagat, Arvind K. Mungray, Alka A. Mungray

{"title":"Effect of sound waves and inclination of membrane on the performance of the osmotic microbial fuel cell","authors":"Mandar S. Bhagat, Arvind K. Mungray, Alka A. Mungray","doi":"10.1016/j.wen.2021.07.003","DOIUrl":"10.1016/j.wen.2021.07.003","url":null,"abstract":"<div>This study aimed to explore the effect of the sound wave and membrane inclination i.e., 45° and 90° (MI45 and MI90) on the performance of osmotic microbial fuel cell (OMFC). The vibrations were given by a sound intensity of 60–80 dB and 20–1000 Hz in an anode compartment for a period of 5–6 h per day. Membrane inclination was given to maximizing the effective surface area under a fixed plane without changing its volumetric capacity to enhance water flux. Membrane inclination increased the effective surface area up to 33.33%, therefore, water flux was increased by 10% by using 45° inclination. The OMFC produced maximum water flux, reverse salt flux and power density of 0.750 ± 0.02 and 0.666 ± 0.02 Lm-2h−1, 3.18 ± 0.02 and 3.10 ± 0.02 gm-2h−1, 35.22 ± 12 and 24.22 ± 08 mW.m−2 for MI45 and MI90 respectively with the effect of sound. The chemical oxygen demand (COD) removal was found 66.85 ± 1% and 59.51 ± 1% with and without the effect of sound. Therefore, sound reduced the OMFC start-up time by 2–3 days based on open-circuit voltage data and also increased the anaerobic degradation by 6–9%. Overall, sound stimulates bacterial growth for the degradation of organic matter, and membrane inclination gives a more effective surface area for water flux.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 113-122"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.07.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91419229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Comparative evaluation of wastewater and bioventing system for the treatment of acid mine drainage contaminated soils 废水与生物通风系统处理酸性矿井污水污染土壤的比较评价

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.08.001

Ifeanyi Michael Smarte Anekwe , Yusuf Makarfi Isa

{"title":"Comparative evaluation of wastewater and bioventing system for the treatment of acid mine drainage contaminated soils","authors":"Ifeanyi Michael Smarte Anekwe , Yusuf Makarfi Isa","doi":"10.1016/j.wen.2021.08.001","DOIUrl":"10.1016/j.wen.2021.08.001","url":null,"abstract":"<div>The increasing rate of soil pollution poses a prolific threat to the sustenance of the ecosystem. Acid mine drainage (AMD) is an environmental problem that has contributed immensely to soil pedogenesis and contamination associated with mining activities. Physical, chemical, and thermal methods of soil treatment have some rooms for improvement to meet remediation purposes. Contrary to other methods, bioremediation is a cost-effective and a sustainable biological approach that utilizes microorganisms for the remediation of a contaminated environment and does not recontaminate or further degrade the soil after application. This study aims to comparatively evaluate the application of wastewater and bioventing system for the the treatment of AMD contaminated soils. A microcosm containing 1 kg of contaminated soil was amended with wastewaters of varying (biostimulation (BSTa)) while bioventing treatment (BVTa) consists of the injection of atmospheric air through the vadose zone into bioreactors and amended with wastewater effluents. The treatment was conducted at ambient condition for 28 days. The result of the treatment recorded 28–67% and 58–70% metal (Mn, Fe, Al, Cu and Zn) removal efficiencies with 51% and 34% sulfate removal efficiencies for BSTa and BVTa treatments, respectively. However, attempts to improve the sulfate removal efficiencies through the injection of atmospheric air were not effective. This study showed that wastewater and bioventing can be effectively applied as a potential alternative for the treatment of AMD contaminated soils.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 134-140"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81099578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Optimal methodology for water recycling and reusability of multiproduct batch plant 多产品间歇装置水循环利用的优化方法

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.10.001

Jaydeep Jivani, Meka Srinivasarao, Anand P. Dhanwani

{"title":"Optimal methodology for water recycling and reusability of multiproduct batch plant","authors":"Jaydeep Jivani, Meka Srinivasarao, Anand P. Dhanwani","doi":"10.1016/j.wen.2021.10.001","DOIUrl":"10.1016/j.wen.2021.10.001","url":null,"abstract":"<div>Multiproduct batch plants are seriously affected by improper production schedules and inefficient wastewater handling. These batch process industries consume massive amounts of fresh water for process and multiple washings of process equipment. Primary objective of the present work is to minimize freshwater intake through proper handling and reuse of wastewater. This paper proposes an optimal methodology of wastewater recycle to address the environmental and economic issues. We explore the possibility of recycling reusable water before sending it to Effluent Treatment Plant (ETP) for treatment. We formulated a constraint, mixed integer non-linear programming (MINLP) optimization model, to simultaneously address environmental and economic issues for a multiproduct batch plant. The model applied to a process involving multiple washes and multiple storage tanks having pre-specified concentration limits. This model provides the amount of recyclable wash water, overall freshwater demand and effluent generation. The reported case study suggests that the freshwater reduction is in the range of 40–60%. We also performed dynamic simulations using the MATLAB-GAMS interface to monitor dynamic variation in the height of waste water in segregation tanks due to dynamic variation in wash water generation.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 141-148"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2588912521000138/pdfft?md5=c64b56e9cab29ad648de9c83f8f7ac42&pid=1-s2.0-S2588912521000138-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77352923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow 模拟活性炭对柚木和乳木果木炭中铁和锰的连续低流量吸附

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.02.001

Worlanyo Kwadjo Siabi , Emmanuel Degraft-Johnson Owusu-Ansah , Helen Michelle Korkor Essandoh , Nana Yaw Asiedu

{"title":"Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow","authors":"Worlanyo Kwadjo Siabi , Emmanuel Degraft-Johnson Owusu-Ansah , Helen Michelle Korkor Essandoh , Nana Yaw Asiedu","doi":"10.1016/j.wen.2021.02.001","DOIUrl":"10.1016/j.wen.2021.02.001","url":null,"abstract":"<div>Nearly 6494 boreholes with iron (Fe) and manganese (Mn) concentrations above permissible limits of 0.3 mg/L and 0.4 mg/L respectively in Ghana have been abandoned because of ineffective water treatment solutions. Activated carbon prepared from teak (Tectona grandis) and shea (Vitellaria paradoxa) charcoal (ACM), of effective grain sizes 0.075–0.2 mm and 0.2–2.0 mm was found to achieve 92.5–100% Fe and Mn removal in batch tests. The experiments, which were repeated for natural groundwater with a low flow similar to boreholes simulated with handpumps and limited mechanized water systems achieved similar Fe and Mn adsorption levels. Data on Fe and Mn adsorption for varying ACM mass and grain sizes, using fixed columns in continuous flow tests were fitted to Adam-Bohart, Thomas and Yoon-Nelson adsorption models to generate data for improvement in water treatment designs. The objective of this modelling process is to develop a prediction mechanism for ACM mass and grain size needed for the design of Fe and Mn removal plants for groundwater with various characteristics. Adsorption constants obtained for Yoon-Nelson; 0.3095 and Adams-Bohart; 0.07335 at R2 values of 0.9728 and 0.9841 respectively are appropriate for generating ACM mass needed, when the target contaminant is Fe and Mn</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 88-94"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85606240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

TiO2/graphene oxide nanocomposite with enhanced photocatalytic capacity for degradation of 2,4-dichlorophenoxyacetic acid herbicide 二氧化钛/氧化石墨烯纳米复合材料光催化降解2,4-二氯苯氧乙酸除草剂

Water-Energy Nexus Pub Date : 2021-01-01 DOI: 10.1016/j.wen.2021.07.001

Thillai Sivakumar Natarajan , Praveen Kumar Gopi , Kalithasan Natarajan , Hari C. Bajaj , Rajesh J. Tayade

{"title":"TiO2/graphene oxide nanocomposite with enhanced photocatalytic capacity for degradation of 2,4-dichlorophenoxyacetic acid herbicide","authors":"Thillai Sivakumar Natarajan , Praveen Kumar Gopi , Kalithasan Natarajan , Hari C. Bajaj , Rajesh J. Tayade","doi":"10.1016/j.wen.2021.07.001","DOIUrl":"10.1016/j.wen.2021.07.001","url":null,"abstract":"<div>The present study investigates the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D), a hazardous herbicide using TiO2/Graphene oxide nanocomposite photocatalysts. The nanocomposite photocatalysts were synthesized via solvothermal method by varying the weight percentage of graphene oxide. The nanocomposite photocatalysts were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer Emmet Teller (BET) adsorption isotherm, Fourier-transform infrared (FT-IR) and UV–visible-diffuse reflectance spectroscopy (UV–Vis-DRS) analysis. The XRD pattern of nanocomposite was found unaltered, whereas a significant change around 33–91% was observed in the surface area of nanocomposites as compared to the pristine TiO2. The UV–Vis DRS study showed a blue shift in the band edge of the composites around 21–29 nm. The complete photocatalytic degradation of 2,4-D was achieved using TiO2/GO7% catalyst within 4 h of reaction under UV-light irradiation. The photocatalytic activity of the synthesized nanocomposite photocatalysts was also compared with the standard Degussa P-25 TiO2 photocatalyst. The order of photocatalytic activity of the synthesized photocatalysts were TiO2/GO7% > P25-TiO2 > TiO2/GO5% > TiO2/GO2% > TiO2/GO1% > TiO2/GO10% > TiO2/GO0.5% > Pristine-TiO2. This study offers a better platform for the synthesis of new composite photocatalytic materials for environment abatement by the degradation of organic pollutants.</div>","PeriodicalId":101279,"journal":{"name":"Water-Energy Nexus","volume":"4 ","pages":"Pages 103-112"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wen.2021.07.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82700528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11