Le Huu Thanh, Le Thai Binh, Le Minh Tri, Pham Thi Thanh Nhan, Vo Hoang Tung, Nguyen Tran Hung
This study presented the process of synthesizing carbon aerogel materials from waste paper for the purpose of absorbing volatile organic compounds (VOCs). The fabricated materials showed suitable properties as adsorbent materials: low density, high porosity and large surface area. The carbonization temperature and density of carbon aerogel were studied and showed a clear influence on the adsorption capacity of the materials. The adsorption capacity of the material has been tested and it is shown that it can reach 400 mg/g for toluene and acetone.
{"title":"Carbon aerogel materials synthesized from recycle paper and their VOC adsorbtion capacity","authors":"Le Huu Thanh, Le Thai Binh, Le Minh Tri, Pham Thi Thanh Nhan, Vo Hoang Tung, Nguyen Tran Hung","doi":"10.62239/jca.2023.068","DOIUrl":"https://doi.org/10.62239/jca.2023.068","url":null,"abstract":"This study presented the process of synthesizing carbon aerogel materials from waste paper for the purpose of absorbing volatile organic compounds (VOCs). The fabricated materials showed suitable properties as adsorbent materials: low density, high porosity and large surface area. The carbonization temperature and density of carbon aerogel were studied and showed a clear influence on the adsorption capacity of the materials. The adsorption capacity of the material has been tested and it is shown that it can reach 400 mg/g for toluene and acetone.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256611","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}
This study involved synthesizing a magnetic composite material of chitosan and carbon nanotubes using the freeze-drying process. The composite was created by mixing chitosan (CS), carbon nanotubes (CNT), and Fe3O4 in different ratios (w/w) (1.2:0.3:0.5, 1.2:0.5:0.3, 1.2:0.6:0.2 and 1.2:0.7:0.1). Results showed that the most porous structure was achieved with a ratio of 1.2:0.5:0.3 for CS:CNT:Fe3O4 (w/w). Various analytical methods such as FT-IR, SEM, XRD, and TGA were employed to determine the characteristics of the composite. The composite material was tested for its ability to adsorb Pb2+ heavy metal ions and reactive blue 198 (RB198) at concentrations ranging from 25 to 100 ppm. The study also investigated the effects of adsorbent amount, pH, and equilibrium time on the adsorption performance of the material.
{"title":"Preparation of magnetic composite based on chitosan/carbon nanotubes for reactive blue 198 and lead (II) ion removal","authors":"Nguyen Thi Hong Anh, Nguyen Van Cuong","doi":"10.62239/jca.2023.066","DOIUrl":"https://doi.org/10.62239/jca.2023.066","url":null,"abstract":"This study involved synthesizing a magnetic composite material of chitosan and carbon nanotubes using the freeze-drying process. The composite was created by mixing chitosan (CS), carbon nanotubes (CNT), and Fe3O4 in different ratios (w/w) (1.2:0.3:0.5, 1.2:0.5:0.3, 1.2:0.6:0.2 and 1.2:0.7:0.1). Results showed that the most porous structure was achieved with a ratio of 1.2:0.5:0.3 for CS:CNT:Fe3O4 (w/w). Various analytical methods such as FT-IR, SEM, XRD, and TGA were employed to determine the characteristics of the composite. The composite material was tested for its ability to adsorb Pb2+ heavy metal ions and reactive blue 198 (RB198) at concentrations ranging from 25 to 100 ppm. The study also investigated the effects of adsorbent amount, pH, and equilibrium time on the adsorption performance of the material.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255876","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}
Directed arylation of sp2 C−H bonds is often considered one of the most convenient methods to rapidly increase the complexity of organic molecules. However, most of the available methods utilized fluoroalcohols such as hexafluoroisopropanol (HFIP) as the solvent. Herein we report a simple method for palladium-catalyzed, directed arylation of arene C−H bond using acetic acid solvent. The successful functionalization relies on the use of pyrazole directing group.
{"title":"Pyrazole-directed, fluoroalcohol-free arylation of C-H bonds","authors":"Le Van Lam, Nguyen Thanh Tung","doi":"10.62239/jca.2024.001","DOIUrl":"https://doi.org/10.62239/jca.2024.001","url":null,"abstract":"Directed arylation of sp2 C−H bonds is often considered one of the most convenient methods to rapidly increase the complexity of organic molecules. However, most of the available methods utilized fluoroalcohols such as hexafluoroisopropanol (HFIP) as the solvent. Herein we report a simple method for palladium-catalyzed, directed arylation of arene C−H bond using acetic acid solvent. The successful functionalization relies on the use of pyrazole directing group.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256607","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}
Nguyen Nho Dung, Phan Thi Kim Thu, Nguyen Thanh Binh, Nguyen Giang Nam, Nguyen Mau Thanh
In the present paper, nanosized magnesium ferrite (MgFe2O4) material is synthesized by the hydrothermal method. The size and microstructure of magnesium ferrite were analyzed based on X-ray diffraction (XRD), scanning electron microscopy (SEM). The nitrogen adsorption-desorption was used for determination of surface area (Brunauer – Emmett – Teller (BET)) and porosity of the fabricated material. The adsorption behavior of Pb2+ using a new magnetic adsorbent is investigated. The adsorption characteristic and Pb2+ removal efficiency of the adsorbent have been determined by investigating the influence of operating variables such as dosage of manganese ferrite. The maximum Pb2+ sorption capacity was found to be 16,08 (mg/g) and obtained using 0,1 g/L MgFe2O4 when pH equals 5, a temperature of 25 °C, and contact time as 24 h. The Langmuir and Freundlich models were used to fit the experimental data and these showed good correlations.
{"title":"Synthesized MgFe2O4 nanoparticles to remove Pb2+ from aqueous solution","authors":"Nguyen Nho Dung, Phan Thi Kim Thu, Nguyen Thanh Binh, Nguyen Giang Nam, Nguyen Mau Thanh","doi":"10.62239/jca.2023.077","DOIUrl":"https://doi.org/10.62239/jca.2023.077","url":null,"abstract":"In the present paper, nanosized magnesium ferrite (MgFe2O4) material is synthesized by the hydrothermal method. The size and microstructure of magnesium ferrite were analyzed based on X-ray diffraction (XRD), scanning electron microscopy (SEM). The nitrogen adsorption-desorption was used for determination of surface area (Brunauer – Emmett – Teller (BET)) and porosity of the fabricated material. The adsorption behavior of Pb2+ using a new magnetic adsorbent is investigated. The adsorption characteristic and Pb2+ removal efficiency of the adsorbent have been determined by investigating the influence of operating variables such as dosage of manganese ferrite. The maximum Pb2+ sorption capacity was found to be 16,08 (mg/g) and obtained using 0,1 g/L MgFe2O4 when pH equals 5, a temperature of 25 °C, and contact time as 24 h. The Langmuir and Freundlich models were used to fit the experimental data and these showed good correlations.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255695","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}
Phung Khac Nam Ho, Nguyen Ngoc Linh, Mai Quoc Long, La Duc Duong, Nguyen Thi Hoai Phuong, Nguyen Thi Hong Phuong
MIL-101(Cr) is formed from 1,4- benzene dicarboxylate and chromium trimer bridges and possesses a zeotype and medium pore structure along with a large BET-specific surface area, the bases for it to be a leading material in environmental remediation applications. This study synthesized the MIL-101(Cr) metal-organic framework using the hydrothermal method. The formed materials have sharp crystalline morphology octahedral size from 100-300 nm. XRD plot showing peaks at 21.10o and 26,73o assigned to MIL-101(Cr). The surface area of this material calculated by the N2 adsorption isotherm method gives the result of ~ 2,900 m2/g. This material can remove organic dyes by the simultaneous photocatalytic adsorption mechanism. The ability to remove methyl orange at an initial concentration of 10 ppm was over 90%.
{"title":"Study on the ability to remove azo dyes of the metal-organic framework material MIL-101(Cr)","authors":"Phung Khac Nam Ho, Nguyen Ngoc Linh, Mai Quoc Long, La Duc Duong, Nguyen Thi Hoai Phuong, Nguyen Thi Hong Phuong","doi":"10.62239/jca.2023.074","DOIUrl":"https://doi.org/10.62239/jca.2023.074","url":null,"abstract":"MIL-101(Cr) is formed from 1,4- benzene dicarboxylate and chromium trimer bridges and possesses a zeotype and medium pore structure along with a large BET-specific surface area, the bases for it to be a leading material in environmental remediation applications. This study synthesized the MIL-101(Cr) metal-organic framework using the hydrothermal method. The formed materials have sharp crystalline morphology octahedral size from 100-300 nm. XRD plot showing peaks at 21.10o and 26,73o assigned to MIL-101(Cr). The surface area of this material calculated by the N2 adsorption isotherm method gives the result of ~ 2,900 m2/g. This material can remove organic dyes by the simultaneous photocatalytic adsorption mechanism. The ability to remove methyl orange at an initial concentration of 10 ppm was over 90%.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256560","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}
Nguyen Thi Hong Phuong, Nguyen Thi Linh, Khuat Hoang Binh, Tran Van Huu, Tran Van Khanh, Nguyen Linh Hoa, Do Thi Ngoc Minh, Dao Nhat Anh, Ho Phuong Hien, Mai Huu Thuan, La Duc Duong
Synthetic plastics are found in all manufacturing industries and in daily life because plastic products bring convenience to life. Polyethylene terephthalate (PET) is one of the most popular synthetic plastics with increasing consumption. Every year, the huge amount of PET plastic waste is discharged into the environment. Therefore, it is necessary to have an effective solution for PET plastic waste. In this study, PET waste plastic was utilized to fabricate activated carbon using the chemical activating approach. H3PO4 acid was used as activating agent. The influence of impregnation rate of PET waste platic with H3PO4, activating temperature, activating time on the surface areas of activated carbon was investigated. The prepared activated carbon was well-characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), FTIR, and BET. The activated carbon prepared from the :PET plastic waste revealed high absorption toward methylene blue in aqueous solution in a wide range of pH solutions. The fabrication of activated carbon from the plastic waste not only address the environmental issues, but also produce high-value activated carbon for the environmental remediation.
合成塑料遍布所有制造业和日常生活，因为塑料产品给生活带来了便利。聚对苯二甲酸乙二醇酯（PET）是最受欢迎的合成塑料之一，其消费量日益增加。每年都有大量的 PET 塑料废弃物被排放到环境中。因此，有必要找到一种有效的 PET 塑料废弃物解决方案。本研究采用化学活化法利用 PET 废塑料制造活性炭。活化剂为 H3PO4 酸。研究了 H3PO4 对 PET 废塑料的浸渍率、活化温度、活化时间对活性炭表面积的影响。用扫描电子显微镜（SEM）、X 射线衍射（XRD）、傅立叶变换红外光谱（FTIR）和 BET 对制备的活性炭进行了表征。用 PET 塑料废料制备的活性炭在广泛的 pH 值范围内对水溶液中的亚甲基蓝都有很高的吸收率。利用塑料废弃物制备活性炭不仅能解决环境问题，还能生产出用于环境修复的高价值活性炭。
{"title":"Fabrication of activated carbon from polyethylene terephthalate plastic waste (PET) and their application for the removal of organic dyes in aqueous solution by chemical method","authors":"Nguyen Thi Hong Phuong, Nguyen Thi Linh, Khuat Hoang Binh, Tran Van Huu, Tran Van Khanh, Nguyen Linh Hoa, Do Thi Ngoc Minh, Dao Nhat Anh, Ho Phuong Hien, Mai Huu Thuan, La Duc Duong","doi":"10.62239/jca.2023.061","DOIUrl":"https://doi.org/10.62239/jca.2023.061","url":null,"abstract":"Synthetic plastics are found in all manufacturing industries and in daily life because plastic products bring convenience to life. Polyethylene terephthalate (PET) is one of the most popular synthetic plastics with increasing consumption. Every year, the huge amount of PET plastic waste is discharged into the environment. Therefore, it is necessary to have an effective solution for PET plastic waste. In this study, PET waste plastic was utilized to fabricate activated carbon using the chemical activating approach. H3PO4 acid was used as activating agent. The influence of impregnation rate of PET waste platic with H3PO4, activating temperature, activating time on the surface areas of activated carbon was investigated. The prepared activated carbon was well-characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), FTIR, and BET. The activated carbon prepared from the :PET plastic waste revealed high absorption toward methylene blue in aqueous solution in a wide range of pH solutions. The fabrication of activated carbon from the plastic waste not only address the environmental issues, but also produce high-value activated carbon for the environmental remediation.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140255739","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}
Bui Thi Minh Nguyet, Nguyen Thanh Tuoi, Nguyen Van Hung
This study used reed biomass and urea as raw materials to produce biochar and g-C3N4 by pyrolysis under N2 atmospheric conditions at 400oC and 520oC, respectively. The g-C3N4/biochar materials were prepared by dispersing different masses of g-C3N4 onto the biochar surface and characterized by XRD, SEM, BET, FT-IR and UV-Vis-DRS methods. The photocatalytic degradation on doxycycline (DC) was investigated from the factors of pH and concentration. The characterization showed that g-C3N4 was well incorporated on the surface of biochar and increased the specific surface area of the material. The presence of biochar narrowed the band gap and increased light absorption at a wider wavelength range of g-C3N4. The composite of g-C3N4/biochar ratio of 2/1 presented the best performance, which is 2.38 times faster than g-C3N4 degrading DC. Kinetic studies showed that DC degradation followed pseudo-first-order kinetics with a determined rate constant kapp = 4,82×10-2 min−1 at a concentration of 5.0 mg/L DC. The study shows that the g-C3N4/biochar material has great potential in the treatment of antibiotic contaminated wastewater.
{"title":"Synthesis of g-C3N4/biochar materials for photocatalytic degradation of doxycycline in aqueous solution under visible light irradiation","authors":"Bui Thi Minh Nguyet, Nguyen Thanh Tuoi, Nguyen Van Hung","doi":"10.62239/jca.2023.075","DOIUrl":"https://doi.org/10.62239/jca.2023.075","url":null,"abstract":"This study used reed biomass and urea as raw materials to produce biochar and g-C3N4 by pyrolysis under N2 atmospheric conditions at 400oC and 520oC, respectively. The g-C3N4/biochar materials were prepared by dispersing different masses of g-C3N4 onto the biochar surface and characterized by XRD, SEM, BET, FT-IR and UV-Vis-DRS methods. The photocatalytic degradation on doxycycline (DC) was investigated from the factors of pH and concentration. The characterization showed that g-C3N4 was well incorporated on the surface of biochar and increased the specific surface area of the material. The presence of biochar narrowed the band gap and increased light absorption at a wider wavelength range of g-C3N4. The composite of g-C3N4/biochar ratio of 2/1 presented the best performance, which is 2.38 times faster than g-C3N4 degrading DC. Kinetic studies showed that DC degradation followed pseudo-first-order kinetics with a determined rate constant kapp = 4,82×10-2 min−1 at a concentration of 5.0 mg/L DC. The study shows that the g-C3N4/biochar material has great potential in the treatment of antibiotic contaminated wastewater.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256373","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}
Nguyen Viet Quang, Trinh Xuan Bai, Ha Thi Lan Anh, Ta Ngoc Thien Huy, Ta Ngoc Don
This paper presents the results of research on treatment of poor quality L62 diesel fuel and TC-1 jet fuel scale of 100 liters/hour using nano zeolite NaX adsorbent synthesized directly from Vietnamese rice husk ash and kaolin. Samples of L62 diesel fuel and TC-1 jet fuel before and after treatment were analyzed and evaluated according to the technical criteria of TCVN 5689, GOST 305 and GOST 10227. The obtained results proved that poor quality samples of L62 diesel fuel and TC-1 jet fuel after being treated with nano zeolite NaX adsorbent can be reused as fuel for ships and aircraft.
{"title":"Research to treat poor quality fuels by 100 l/h case frame filters using nano zeolite NaX as adsorbent","authors":"Nguyen Viet Quang, Trinh Xuan Bai, Ha Thi Lan Anh, Ta Ngoc Thien Huy, Ta Ngoc Don","doi":"10.62239/jca.2023.071","DOIUrl":"https://doi.org/10.62239/jca.2023.071","url":null,"abstract":"This paper presents the results of research on treatment of poor quality L62 diesel fuel and TC-1 jet fuel scale of 100 liters/hour using nano zeolite NaX adsorbent synthesized directly from Vietnamese rice husk ash and kaolin.\u0000Samples of L62 diesel fuel and TC-1 jet fuel before and after treatment were analyzed and evaluated according to the technical criteria of TCVN 5689, GOST 305 and GOST 10227. The obtained results proved that poor quality samples of L62 diesel fuel and TC-1 jet fuel after being treated with nano zeolite NaX adsorbent can be reused as fuel for ships and aircraft.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256115","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}
Vo Thi Bich Tran, Nguyen Van Thuc, Do Manh Cuong, Nguyen Thi Huynh Nhu, Huynh Thi Thanh Truc, Ho Sy Thang
Fabrication of adsorbent materials has been done by mixing peat and coal slag, the ratio of 70:30 by weight. The obtained material has a specific surface area S of 10.45 m2/g, rough surface morphology with many functional groups, with high adsorption capacity. The time to reach adsorption equilibrium is 120 minutes, COD adsorption capacity of 15.54 mg/g, N-NH4 adsorption capacity of 10.72 mg/g. The kinetic law of N-NH4 adsorption obeys the apparent second order type 2 equation. The N-NH4 adsorption isotherm obeys both Langmuir and Freundlich equations. The materials are used to adsorb substances in catfish pond wastewater with the criteria of BOD5, COD, N-NO3, N-NH4, total phosphorus, and treatment efficiency from 24.95 to 88.81%.
{"title":"Study on the adsorption of nutrients in the wastewater of catfish ponds by the adsorbent system prepared from peat","authors":"Vo Thi Bich Tran, Nguyen Van Thuc, Do Manh Cuong, Nguyen Thi Huynh Nhu, Huynh Thi Thanh Truc, Ho Sy Thang","doi":"10.62239/jca.2023.070","DOIUrl":"https://doi.org/10.62239/jca.2023.070","url":null,"abstract":"Fabrication of adsorbent materials has been done by mixing peat and coal slag, the ratio of 70:30 by weight. The obtained material has a specific surface area S of 10.45 m2/g, rough surface morphology with many functional groups, with high adsorption capacity. The time to reach adsorption equilibrium is 120 minutes, COD adsorption capacity of 15.54 mg/g, N-NH4 adsorption capacity of 10.72 mg/g. The kinetic law of N-NH4 adsorption obeys the apparent second order type 2 equation. The N-NH4 adsorption isotherm obeys both Langmuir and Freundlich equations. The materials are used to adsorb substances in catfish pond wastewater with the criteria of BOD5, COD, N-NO3, N-NH4, total phosphorus, and treatment efficiency from 24.95 to 88.81%.","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256214","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}
Le Thi Duyen, Le Thi Phuong Thao, Cong Tien Dung, Le Thi Vinh, Vu Thi Minh Hong, Pham Tien Dung, Dinh Thi Mai Thanh
Hydroxyapatite (HAp) granules were fabricated successfully from HAp powder and polyvinyl alcohol (PVA) additive by sintering method. The characterization of material was analyzed by color, durability in the water, XRD, EDX, SEM and BET. The obtained HAp granules were white, single phase of HAp, with specific surface area of 73 m2/g, size of granule about (2 × 10) mm. HAp granules were used for the removal of Zn2+ ions from aqueous solution. The effect of factors on the Zn2+ adsorption property was investigated. The adsorption efficiency and capacity obtained 77.15 % and 2.57 mg/g, respectively at suitable batch adsorption condition: HAp granule mass of 0.5 g/ 50mL solution, initial concentration of 20 mg/L Zn2+, contact time 40 minutes and pH0 5.7 at 30 oC. The adsorption efficiency reached about 99.55 % at suitable column adsorption condition: contact time of 3,5 min, flow rate of 14 mL/min, adsorption zone height of 4Ф (Ф = 2.5 cm), initial concentration of 20 mg/L Zn2+, HAp granule mass of 11.9 g/ 2L solution, pH0 5.7 at 30 oC.
{"title":"Research on column adsorption of Zn2+ by hydroxyapatite granules","authors":"Le Thi Duyen, Le Thi Phuong Thao, Cong Tien Dung, Le Thi Vinh, Vu Thi Minh Hong, Pham Tien Dung, Dinh Thi Mai Thanh","doi":"10.62239/jca.2023.076","DOIUrl":"https://doi.org/10.62239/jca.2023.076","url":null,"abstract":"Hydroxyapatite (HAp) granules were fabricated successfully from HAp powder and polyvinyl alcohol (PVA) additive by sintering method. The characterization of material was analyzed by color, durability in the water, XRD, EDX, SEM and BET. The obtained HAp granules were white, single phase of HAp, with specific surface area of 73 m2/g, size of granule about (2 × 10) mm. HAp granules were used for the removal of Zn2+ ions from aqueous solution. The effect of factors on the Zn2+ adsorption property was investigated. The adsorption efficiency and capacity obtained 77.15 % and 2.57 mg/g, respectively at suitable batch adsorption condition: HAp granule mass of 0.5 g/ 50mL solution, initial concentration of 20 mg/L Zn2+, contact time 40 minutes and pH0 5.7 at 30 oC. The adsorption efficiency reached about 99.55 % at suitable column adsorption condition: contact time of 3,5 min, flow rate of 14 mL/min, adsorption zone height of 4Ф (Ф = 2.5 cm), initial concentration of 20 mg/L Zn2+, HAp granule mass of 11.9 g/ 2L solution, pH0 5.7 at 30 oC. ","PeriodicalId":23507,"journal":{"name":"Vietnam Journal of Catalysis and Adsorption","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256414","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}
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