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Vietnam Journal of Catalysis and Adsorption最新文献

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Removal Behavior of Pb2+, Cd2+, Zn2+ from wastewater of lead, zinc mining – Cho Don, Bac Kan by halloysite clay 高岭土对曹敦北坎铅锌矿废水中Pb2+、Cd2+、Zn2+的去除行为
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-11 DOI: 10.51316/jca.2023.036
D. T. Le, Luc The Trinh, Bac Hoang Bui, Dung Tien Cong, Thao Phuong Thi Le
{"title":"Removal Behavior of Pb2+, Cd2+, Zn2+ from wastewater of lead, zinc mining – Cho Don, Bac Kan by halloysite clay","authors":"D. T. Le, Luc The Trinh, Bac Hoang Bui, Dung Tien Cong, Thao Phuong Thi Le","doi":"10.51316/jca.2023.036","DOIUrl":"https://doi.org/10.51316/jca.2023.036","url":null,"abstract":"Halloysite from Thach Khoan, Phu Tho province showed nanotube structure with a chemical formula Al2Si2O5(OH)4.2H2O when fully hydrated and Al2Si2O5(OH)4 when dehydrated, specific surface areas are 15.7434 and 22.0211 m2/g. Halloysite was used to study on adsorption behaviour of Pb2+, Cd2+, Zn2+ (M2+) ions. The effect of factors on the M2+ adsorption efficiency was investigated. The adsorption efficiency of Pb2+, Cd2+, Zn2+ obtained 90.75; 73.75 and 67.09 % respectively under the suitable condition: halloysite mass of 0.7 g/50 mL solution, initial concentration of 40 mg/L M2+, pH for Pb2+, Cd2+, Zn2+ = 5.31; 6.2; 5.6 espectively, contact time of 80 minutes (for Pb2+, Cd2+) and 100 minutes (for Zn2+) at room temperature (30 oC). Adsorption isotherm curves were studied based on Langmuir and Freundlich models. The kinetic of the adsorption process was investigated following the first-order-pseudo and second-order-pseudo models. Removal efficiency of Pb2+, Cd2+ and Zn2+ from the wastewater of lead, zinc mining – Cho Don, Bac Kan was 99,59 %; 92,08 % và 99,46 %, respectively.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91109839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Construction of NdFeO3 nanoparticles on reduced graphene oxide for an enhanced visible light assisted-Fenton degradation of organic pollutant in oily wastewater 在还原氧化石墨烯上构建NdFeO3纳米颗粒以增强可见光辅助fenton降解含油废水中的有机污染物
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-10 DOI: 10.51316/jca.2023.029
N. Phan, N. Chu
{"title":"Construction of NdFeO3 nanoparticles on reduced graphene oxide for an enhanced visible light assisted-Fenton degradation of organic pollutant in oily wastewater","authors":"N. Phan, N. Chu","doi":"10.51316/jca.2023.029","DOIUrl":"https://doi.org/10.51316/jca.2023.029","url":null,"abstract":"In this study, reduced graphene oxide (rGO) incorporated on NdFeO3  (NFO/rGO) nanocomposite was successfully synthesized by using a facile hydrothermal method for photo-Fenton degradation of phenol in oily wastewater. The structural, elemental, morphological, optical property, and photo-Fenton performance of NFO/rGO nanocomposite were evaluated. From the characterizations, the prepared NFO/rGO nanocomposite showed a heterostructure between reduced graphene oxide (rGO) and NdFeO3. In addition, the prepared NFO/rGO photocatalyst has efficient charge separation compared to that of pure NFO. The photo-Fenton catalytic activity of the NFO/rGO photocatalyst was investigated by phenol degradation under visible light irradiation, with a maximum removal efficiency of 94.3 % after 90 min. In contrast to pure NFO, the introduction of rGO could suggestively enhance the photo-Fenton catalytic activity by increasing the specific surface area and narrow band gap energy. The possible reaction mechanism was also discussed.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"297 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73085346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the application of biochar made from agricultural by-products to treat arsenic pollution in water 农副产物生物炭处理水中砷污染的应用研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-10 DOI: 10.51316/jca.2023.026
Hien Chu, N. Tran, D. Dang, Viet Minh Nguyen, Hieu Cong Nguyen, Thao Truong, Binh Thi Lai
{"title":"Study on the application of biochar made from agricultural by-products to treat arsenic pollution in water","authors":"Hien Chu, N. Tran, D. Dang, Viet Minh Nguyen, Hieu Cong Nguyen, Thao Truong, Binh Thi Lai","doi":"10.51316/jca.2023.026","DOIUrl":"https://doi.org/10.51316/jca.2023.026","url":null,"abstract":"Now, water pollution is one of the leading concerns in the world especially heavy metal polltion. In recent years, researches on the use of agricultural waste as biochar and modified biochar to treat heavy metals in water are receiving the attention of scientists because of the economy as well as the high processing efficiency that it brings. In this study, biochar from rice husk was synthesized and modified by iron, then the obtained materials were characterized by SEM, FTIR methods. The results show that the Fe-biochar shows a high potential to remove arsenic at pH = 4 and the adsorption capacity was 18,96 – 28,49 mg/g.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80152226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highly effective graphene membrane for transformer oil purification 用于变压器油净化的高效石墨烯膜
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-10 DOI: 10.51316/jca.2023.028
T. T. Vu, Chi Thi Linh Nguyen, T. V. Pham
{"title":"Highly effective graphene membrane for transformer oil purification","authors":"T. T. Vu, Chi Thi Linh Nguyen, T. V. Pham","doi":"10.51316/jca.2023.028","DOIUrl":"https://doi.org/10.51316/jca.2023.028","url":null,"abstract":"A highly effective adsorbent comprised of the Graphene membrane was created using the sonification method in this study. For all we know, the resulting Graphene membrane was employed as an adsorbent for transformer oil purification for the first time. The quality of the treated oil was evaluated through several factors, such as acid number TAN(mg KOH/g), color, breakdown voltage, and viscosity.  The results indicated that the Graphene membrane exceeded the other commercial adsorbents in terms of purifying capacity. Several reasons, including the unreduced oxygen functional groups, vacancy defects on the surface of the Graphene flake, the high specific surface area, and the proper pore size of the Graphene membrane for oil refining, might explain this exceptional outcome. Furthermore, the 3D structure of the Graphene membrane can extend the residence purification time of the transformer oil, assisting in the improvement of the purification capability of the Graphene membrane.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74144048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sol-gel synthesis and characterization of neodymium orthoferrite for disposing oily wastewater 处理含油废水用正铁氧体钕的溶胶-凝胶合成及表征
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-10 DOI: 10.51316/jca.2023.027
N. Phan, N. Chu
{"title":"Sol-gel synthesis and characterization of neodymium orthoferrite for disposing oily wastewater","authors":"N. Phan, N. Chu","doi":"10.51316/jca.2023.027","DOIUrl":"https://doi.org/10.51316/jca.2023.027","url":null,"abstract":"The aim of this study was to design and characterize a NdFeO3-based photocatalyst prepared by sol-gel method for treatment of oily wastewater. Different characterization techniques such as X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), UV–vis spectrophometer were used to elucidate the structure, morphology, surface functional groups, and optical absorption properties of the prepared NdFeO3 photocatalyst. The photo-Fenton degradation performance of the as-prepared NdFeO3 photocatalyst was investigated by degrading oily-containing wastewater under visible light irradiation. The NdFeO3 photocatalyst manifests the high chemical oxygen demand (COD) removal efficiency of 97.6 % for 120 min reaction) thanks to its narrow band gap energy and high crystalline degree.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85239937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrothermal Synthesis and Catalytic Activity of a Nanosized Fe2V4O13 Material in Heterogeneous Fenton-like Reaction for Degradation of Organic Compounds 纳米级 Fe2V4O13 材料的水热合成及其在异相 Fenton 类反应中降解有机化合物的催化活性
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-07-09 DOI: 10.51316/jca.2023.024
Vân-Anh Nguyen, Manh Dang-Vu Nguyen, Canh Ba Bui, Lien Hong Nguyen, Nga To Thi Phan, Ha Hong Cao
{"title":"Hydrothermal Synthesis and Catalytic Activity of a Nanosized Fe2V4O13 Material in Heterogeneous Fenton-like Reaction for Degradation of Organic Compounds","authors":"Vân-Anh Nguyen, Manh Dang-Vu Nguyen, Canh Ba Bui, Lien Hong Nguyen, Nga To Thi Phan, Ha Hong Cao","doi":"10.51316/jca.2023.024","DOIUrl":"https://doi.org/10.51316/jca.2023.024","url":null,"abstract":"In this research, the nanosized Fe2V4O13 complex oxide material was synthesized by the hydrothermal method. Its structure, morphology characterization, and other properties were determined using X-ray, SEM, EDX, and DTA-TG methods. The catalytic activity of the material was evaluated in terms of the decolorization and the degradation of the Indigo carmine dye. The optimal condition for the degradation and the reusability of the catalyst were determined. The results showed that the heterogeneous Fenton-like catalyst is a promise for wastewater treatment.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139361292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of the Cam leaf extraction process oriented to synthesize silver nanoparticles (Ag NPs) 面向合成银纳米粒子(Ag NPs)的Cam叶片提取工艺研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-05-31 DOI: 10.51316/jca.2023.014
Cuong Manh Le, Chung Cong Le, Thai Thanh Tran, Lan Anh Thi Luu
{"title":"Investigation of the Cam leaf extraction process oriented to synthesize silver nanoparticles (Ag NPs)","authors":"Cuong Manh Le, Chung Cong Le, Thai Thanh Tran, Lan Anh Thi Luu","doi":"10.51316/jca.2023.014","DOIUrl":"https://doi.org/10.51316/jca.2023.014","url":null,"abstract":"In the present work, the extract process of Cam leaves powder (Peristrophe bivalvis(L.) Merr) was investigated. The results exhibited optimal parameters of the extract process. Green synthesis of silver nanoparticles was demonstrated using the freshly prepared aqueous extract of the Cam leaves powder as a reducing and stabilizing agent. The silver nanoparticles were characterized by analytical techniques such as UV-Vis, FTIR, Raman, XRD, and EDX. Characterization techniques confirmed that the silver nanoparticles were synthesized","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79208289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research and fabrication of high purity α-Al2O3 from Tan Rai aluminum hydroxide 谭雷氢氧化铝制备高纯α-Al2O3的研究
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-05-31 DOI: 10.51316/jca.2023.013
Vo Van Mai, Anh Van Thi Bui, Toan Ta, Phuong Thi Tuyet Nguyen
{"title":"Research and fabrication of high purity α-Al2O3 from Tan Rai aluminum hydroxide","authors":"Vo Van Mai, Anh Van Thi Bui, Toan Ta, Phuong Thi Tuyet Nguyen","doi":"10.51316/jca.2023.013","DOIUrl":"https://doi.org/10.51316/jca.2023.013","url":null,"abstract":"This paper deals the effects of some factors on the fabrication process of high purity α-Al2O3 from Tan Rai Al(OH)3. The obtained results of surface morphology (SEM), crystal structure (XRD), composition (EDX) of the original Al(OH)3 and Al2O3 show that Al(OH)3 washed with CH3COOH 2N is best at 80oC, efficient Dissolution reached the highest when using 25% HCl, Al2O3 calcined at 1400oC for 2 hours. The obtained Al2O3 has the structure α-Al2O3, the highpurity.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85272769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 pH and active radical on the photodegradation of Ciprofloxacin antibiotic in wastewater using novel catalyst based on rGO/halloysite composite decorating with copper iron oxide pH和活性自由基对氧化石墨烯/高岭土复合铜铁修饰光降解废水中环丙沙星抗生素的影响
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-05-31 DOI: 10.51316/jca.2023.015
Ngo Ha-Son, L. Nguyen
{"title":"Effect of pH and active radical on the photodegradation of Ciprofloxacin antibiotic in wastewater using novel catalyst based on rGO/halloysite composite decorating with copper iron oxide","authors":"Ngo Ha-Son, L. Nguyen","doi":"10.51316/jca.2023.015","DOIUrl":"https://doi.org/10.51316/jca.2023.015","url":null,"abstract":"A new generation photocatalyst CuFe2O4/rGO/halloysite nanotube (HNT) was manufactured using a simple procedure in this work. Material characterisation results reveal that the CuFe2O4 active phase with a size of around 30-40 nm is spread rather consistently across the sandwich-like structure of rGO/HNT. The material's bandgap energy is around 1.9 eV, which boosts the material's capacity to function even in the visible light area. The catalytic activity test showed that the catalyst, with an active phase composition of 70% by weight, was able to completely decomposing CIP after just 1 hour of light. The pHpzc value and pH impact were also investigated. The findings suggest that the material can completely handle CIP in a neutral environment (pH = 7). Scavenger tests also demonstrated the involvement of reactive radicals in CIP degradation, with holes (h+) and hydroxyl radicals (●OH) having the major effect. These important results constitute the basis for the in-depth investigations of the CIP degradation mechanism.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90452559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of working process of oxygen concentrator equipment by pressure swing adsorption 变压吸附法对制氧设备工作过程的模拟
Vietnam Journal of Catalysis and Adsorption Pub Date : 2023-05-31 DOI: 10.51316/jca.2023.019
T. D. Vu, Duong Van Le, Minh Duc Mai, Hung Duy Vu
{"title":"Simulation of working process of oxygen concentrator equipment by pressure swing adsorption","authors":"T. D. Vu, Duong Van Le, Minh Duc Mai, Hung Duy Vu","doi":"10.51316/jca.2023.019","DOIUrl":"https://doi.org/10.51316/jca.2023.019","url":null,"abstract":"Oxygen is essential for human respiration and the existence of all living organisms. Medically it is used to treat diseases related to impaired respiratory function. In industrial scale, gaseous oxygen is separated from the air by liquefaction and fractional distillation techniques, while on a small and medium scale oxygen is usually separated by using zeolite molecular sieves and pressure swing adsorption (PSA) technology. During the Covid-19 pandemic, the demand for oxygen concentrators (PSA type) for personal and family use is very high. However, there isn’t any Vietnamese factory for production oxygen concentrator, so it is imported from abroad. In this paper, a pilot-scale oxygen concentrator was built at the Department of chemical process equipment, Hanoi University of Science and Technology. The operation of the device has been simulated and optimized on Aspen Adsorption software. The optimization parameters obtained will be used to design the equipment in industrial scale.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75329603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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