International Journal of Chemical Engineering and Applications最新文献

{"title":"Comparison of EPS Extraction Efficiences from Cladophora Glomerata by Two Chemical Extraction Methods","authors":"Hwey-Lin Sheu, Shuiping Chang, Yi-Chao Lee","doi":"10.18178/IJCEA.2019.10.4.754","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.754","url":null,"abstract":"For a macroalga Cladophora glomerata, the extracellular matrix on the surface of algae cell, extracellular polymeric substances (EPS) has a gel-like structure that could fractioned into loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS). The ratio of protein to polysaccharides (P/S) is TB-EPS is higher than LB-EPS. The contents and extraction rate of EPS were compared two chemical extraction methods (formaldehyde-NaOH and NH4OH). The analysis demonstrated that more extraction rates of EPS were achieved by the formaldehyde-NaOH method. The protein to polysaccharides ratio(P/S) in EPS is between 0.299 to 0.375 by formaldehyde-NaOH and between 0.232 to 0.374 by NH4OH. The results indicated that the EPS could be efficiently extracted by the formaldehyde-NaOH method, but the influence of P/S ratios were not obvious.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82550957","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}

{"title":"Application of Non Ionic Surfactant – Alkylpolyglucoside as Chemical Flooding","authors":"A. P. Gustianthy, Y. Krisnandi, Usman Usman","doi":"10.18178/IJCEA.2019.10.4.753","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.753","url":null,"abstract":"Alkylpolyglucosides (APG) is an environment-friendly surfactant prepared from renewable raw materials namely glucose and fatty alcohol in catalysis system of p-Toluenesulfonic acid. This surfactant is nonionic surfactant which has not effect on hard water and pH changes, thus makes it potential to be used as a chemical flooding surfactant. APG was prepared by using fatty alcohol varying in chain length from 1-dodecanol (C12) and 1-tetradecanol (C14). This paper discusses the effect of alkyl chain length of APG as hydrofobic side to their physical properties such as interfacial tension, and capability as chemical flooding surfactant for oil recovery in capillary pressure test. As results, it is shown that at the same concentration, APG with 1-tetradecanol (APG-C14) as a chain length has lower interfacial tension than APG-C12, having critical micelle concentration of 3 %. Both surfactant then were tested for Jirak field oil recovery in capillary presure test. It reveals that the increase of alkyl chain length of APG causes an increase in oil recovery (%), 13.797 % of APG-C14 and 10.733% of APG-C12. To conclude, APG with long alkyl chain length potentially become chemical flooding surfactant for oil recovery.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77942102","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}

{"title":"Different Preparation Methods of Ni-FAU(Y) Zeolite for Nitric Oxide Reduction","authors":"P. Worathanakul, N. Rakpasert","doi":"10.18178/IJCEA.2019.10.4.750","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.750","url":null,"abstract":"The effect of Ni cation supported on FAU(Y) zeolite was prepared by aqueous solution ion exchange and incipient wetness impregnation methods in the selective catalytic reduction of nitric oxide using hydrogen as the reactant in packed bed reactor. 0.5 and 3.5 wt% of Ni (II) metals were loaded in the FAU(Y) zeolite. The samples were characterized by X-ray diffraction, X-ray fluorescence and scanning electron microscope. The obtained Ni/FAU has enlarged pore size of octahedral shaped crystals with approximately 0.22 ± 0.085 μm diameter. Ni loading did not change the structure of FAU(Y) zeolite. Ni (II) loading with 3.5 wt% to FAU-Y zeolite by incipient wetness impregnation method was shown higher nitric oxide conversion than aqueous solution ion exchange method.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81833013","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}

{"title":"Synergistic Extraction of Cd, Cu and Ni with D2EHPA/TBP: Screening of Factors by Fractional Factorial Design","authors":"L. Y. Lee, N. Morad, Norli Ismail, M. Rafatullah","doi":"10.18178/IJCEA.2019.10.4.752","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.752","url":null,"abstract":"This work aimed to determine the significant factors that provide great impacts on the efficiency of synergistic extraction of Cd, Cu and Ni from mixed synthetic aqueous solutions with mixture of extractants, di-(2-ethylhexyl) phosphoric acid (D2EHPA) and tributyl phosphate (TBP) by using two-level fractional factorial design. Six factors affecting the synergistic extraction consisted of mixing time (t), concentration of D2EHPA [D2EHPA], concentration of TBP [TBP], concentration of sodium sulphate [Na2SO4], equilibrium pH (pHeq) and organic to aqueous ratio (O:A) were examined. Results from the application of 2 6-1 fractional factorial design showed that [D2EHPA], O:A and interaction of D2EHPA with TBP ([D2EHPA] × [TBP]) have significantly influenced the extraction percentage (E%) for Cd and Cu.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77671512","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}

{"title":"Anti-amoeba Effect of Branched Medium Chain Fatty Acids and Their Salts on Acanthamoeba Castellanii","authors":"Haruna Sasaki, Toshinari Koda, H. Morita","doi":"10.18178/IJCEA.2019.10.4.748","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.748","url":null,"abstract":"Acanthamoeba castellanii is an organism that causes Acanthamoeba keratitis, an infectious disease. Acanthamoeba are protists that generally inhabiting soils, freshwater, and sea water, but can also infect the cornea due to dirty water infiltration if contaminated contact lenses are worn. In this study, we focused on four branched medium chain fatty acids—2-ethylhexanoic acid, 3,5,5-trimethylhexanoic acid along with their salts, potassium 2-ethylhexanoate, and potassium 3,5,5-trimethylhexanoate. We examined their antimicrobial effect toward A. castellanii and aimed to search for new drugs to be used in contact lens disinfecting solutions. The minimum inhibitory concentrations (MICs) of 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid showed growth reduction of 4-log units (99.99% suppression) in A. castellanii upon 10 min incubation at 12.5 v/v%. In addition, at a diluted concentration of 6.25 v/v%, 2-ethylhexanoic acid produced a 4-log units reduction at 180 min and for 3,5,5-trimethylhexanoic acid, a 4-log units reduction at 60 min. The MICs of potassium 2-ethylhexanoate showed growth reduction of 4 log units in A. castellanii upon 10 min incubation at 2.50 w/v%. However, potassium 3,5,5-trimethylhexanoate showed growth reduction of 4-log units in A. castellanii upon 180 min incubation at 5.00 w/v%. Based on the results of MICs, a verification test of 3,5,5-trimethylhexanoic acid and potassium 2-ethylhexanoate was conducted. As a result, approximately 2.1 logarithmic growths were observed in the control consisting of 10% Tween 80 compared to the initial cell number, and the amoeba growth reduction with 3,5,5-trimethylhexanoic acid could not be confirmed up to a concentration of 0.0122 v/v%. Potassium 2-ethylhexanoate salt was not confirmed to reduce amoeba growth up to 0.625 w/v%. However, the amoeba growth reduction could not be confirmed with the tests where control pH-adjusted solution was applied, either. In the light of the above-mentioned results, it was revealed that 3,5,5-trimethylhexanoic acid exhibits the highest anti-amoeba effect among the four tested branched medium chain fatty acids. This result indicated the possibility to use it in contact lens disinfectant solutions as a novel drug against Acanthamoeba keratitis.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89048882","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}

{"title":"Comparison of Effective in Batik Production Process between Paraffin Wax and Gel Wax-Resist","authors":"Sarath Simsiri","doi":"10.18178/IJCEA.2019.10.4.749","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.749","url":null,"abstract":"Comparison of effective in Batik production process between paraffin wax and gel wax-resist. This study focuses on the characteristics of Batik painting resist and to compare the Batik production processes between those wax-resist, to provide formal guidance how differences to make Batik both process. The research concluded that the Batik painting with gel wax can reduce the Batik equipment, less energy and time in overall process. The means of the opinion on production process and Batik identity from users using gel wax resist material were higher than the those of users using paraffin wax resist material with statistically significant (p<0.05).","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"130 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79591329","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}

{"title":"Characterization of Extracellular Polymeric Substance (EPS) from Cladophora Glomerata under Different Culture Salinities","authors":"Yi-Chao Lee, Hwey-Lin Sheu, Shuiping Chang","doi":"10.18178/IJCEA.2019.10.4.751","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.4.751","url":null,"abstract":" Abstract—Cladophora glomerata is the most abundant algae in freshwater throughout the world. This study discovered that changing culture salinity can induce C. glomerata to produce massive amounts of EPS. Comparing the contents and characteristic functional groups of the EPS under different culture salinity conditions. The contents of protein (2.15-2.71 mg g -1 ) and polysaccharide (6.94-12.64 mg g -1 ) variable increased with increased culture salinity; the ratios if protein to polysaccharide decreased with the increased culture salinity. The FTIR spectra analysis suggested that protein (1640-1680 cm -1 ) and polysaccharide (1120-1170 cm -1 ) were the major components in EPS. Therefore, the range of contents in EPS and the ratios of protein to polysaccharide are influenced by culture salinity This study compared the content and characteristic functional groups of the EPS from the C. glomerata under different culture salinity. The results showed that (1) Thickness of mucilage layer increase with the increase of EPS level. (2) Polysaccharide concentration changed from 6.94 to 12.64 mg g -1 , and the protein concentration changed from 2.15 to -2.71mg g -1 during the whole tests. (3) Content of protein under all different salinities were found to be lower than polysaccharide. (4) The ratios of protein to polysaccharide decresaed with increased culture salinity. (5) The FTIR spectra analysis suggested that protein (1640-1680 cm -1 ) and polysaccharide (1120-1170 cm -1 ) were the major components in EPS. (6) The yield of EPS and fraction EPS contents of algae can controlled by different culture salinity.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80429850","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}

{"title":"Prototyping a Microfluidic Sensor for Real-Time Detection of Airborne Formaldehyde","authors":"Daniel Măriuța, L. Baldas, S. Colin, S. Calve, J. Korvink, J. Brandner","doi":"10.18178/IJCEA.2020.11.1.774","DOIUrl":"https://doi.org/10.18178/IJCEA.2020.11.1.774","url":null,"abstract":"Formaldehyde is a carcinogenic volatile organic compound that is largely used in the fabrication process of a variety of household products, being sometimes released indoor in concentrations that are beyond the limits recommended by the World Health Organization. The current commercially \u0000available formaldehyde sensors are far from simultaneously being ultra-portable, highly sensitive (< 1 ppb), real-time, and especially cost-efficient. This work aims to study the feasibility to miniaturize the formaldehyde sensing system down to a palm hand device, based on the microfluidic Hantzsch reaction method and fluorescence detection. A Gas-Liquid Micro-Reactor based on integration of a hydrophobic membrane inside a polymer flat chip is proposed and its formaldehyde trapping yield is planned to be further tested. By combining contact sensing with time-resolved CMOS sensors, the dimensions of the fluorescence detection component could go down to 10 mm × 20 mm × 30 mm by using commercialavailable \u0000components and therefore, enabling continuous and fast-response measurements using small volumes and low concentration samples.","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82197680","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}

{"title":"Development of Food Waste Disposal Technology Using Sodium Hydroxide","authors":"M. Nakayasu, T. Wajima","doi":"10.18178/IJCEA.2019.10.3.742","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.3.742","url":null,"abstract":"In this research, we focused on the recycling of food waste using sodium hydroxide (NaOH). Pyrolysis of rice, one of the major elements of food waste in Japan, was carried out to obtain carbon material with adsorption ability, together with fuel gases (H2, CH4). As a result, it was possible to convert rice into carbon material while generating fuel gas. With increasing the NaOH addition and temperature, the contents of CO and CO2 decreases, those of H2 and CH4 increased in the generated gas, and the mass of the residue after pyrolysis with NaOH decreases to one-tenth weight of raw rice. The residue after pyrolysis is a carbonaceous material with approximately 80% carbon content, and the residue after pyrolysis with NaOH ( rice sample : NaOH = 1 : 1 ) has smooth porous surface with higher specific surface area (901 m 2 /g) than that after pyrolysis without NaOH (72 m 2 /g).","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82524129","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}

{"title":"Production of Ethanol by Zymomonas Mobilis Mutant : The Effects of Sodium Acetate at pH 5 and No Control pH","authors":"P. Puspita, C. Hsieh, Yao-Sheng Chang","doi":"10.18178/IJCEA.2019.10.3.745","DOIUrl":"https://doi.org/10.18178/IJCEA.2019.10.3.745","url":null,"abstract":"Zymomonas mobilis is an ethanol producer that has the highest ethanol yield on sugar complex-containing glucose and the potential microorganism to replace yeast for ethanol production (ethanol yields up to 97%). The lignocellulosic pretreatment is needed to increase the ethanol production. However, pretreatment methods will create some inhibitor compounds such as acetic acid that reduces ethanol production. The aims of this study were to know the effect of sodium acetate as a form of acetic acid in medium fermentation that contain higher glucose consentration at pH 5 and no control pH. As reported in this study, the effect of the increasing NaAc level related to the pH. The growth of AcR/2-12 and ZM481 for 24 h at pH 5 were inhibited by NaAc concentration above 100 mM. However, the mutant strain AcR/2-12 on fermentation medium contained 100 g/l glucose and supplemented with 195 mM NaAc at pH 5 was still able to grow well and produced 60 g/l ethanol with the ethanol yield of 0.62 g/g (Yproduct/substrate) in 148 h. Whereas, without no control pH, AcR/2-12 was able to tolerate NaAc up to 250 mM and ZM481 was significantly inhibited at 195 mM NaAc. Under the same condition with no control pH, the glucose was completely consumed in 24 h by AcR/2-12 and 57 g/l ethanol was produced with the ethanol yield of 0.58 g/g (Yp/s).","PeriodicalId":13949,"journal":{"name":"International Journal of Chemical Engineering and Applications","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89946999","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}