Journal of Chemical Engineering Research Updates最新文献

Water Sustainability Initiatives to Meet the Water Crisis in India 应对印度水资源危机的水资源可持续发展倡议

Journal of Chemical Engineering Research Updates Pub Date : 2023-11-16 DOI: 10.15377/2409-983x.2023.10.2

M. C. Jena, Sarat Mishra, H. S. Moharana

{"title":"Water Sustainability Initiatives to Meet the Water Crisis in India","authors":"M. C. Jena, Sarat Mishra, H. S. Moharana","doi":"10.15377/2409-983x.2023.10.2","DOIUrl":"https://doi.org/10.15377/2409-983x.2023.10.2","url":null,"abstract":"One of the most pressing global challenges we face today is the rapid growth of the population. As the population continues to expand, the need for rapid industrialization has become paramount. However, this industrialization and urbanization have given rise to a significant and detrimental consequence: environmental pollution. This pollution, in turn, has led to various crises, including those related to water, food, and air quality. Water, being an essential element for human existence, is of utmost importance. Without access to clean and sufficient water, life on Earth would be unsustainable. Unfortunately, India has been grappling with a prominent water crisis, particularly during the summer seasons, resulting in the loss of countless lives each year. Even during other seasons, the availability of water is often satisfactory, but the quality of water remains a concern in many parts of the country. The shortage of water can be attributed primarily to the declining levels of underground water and the ever-increasing demand for this precious resource. India receives ample rainfall during the monsoon season; however, a significant portion of this water flows into the oceans, causing floods in various regions. Conversely, during the summer months, the scarcity of water leads to droughts in many areas. Therefore, it is imperative to initiate sustainable water management practices, including rainwater harvesting, to address this water crisis. This review article delves into various types of water sustainability initiatives with a structured approach and analyzes the associated challenges. Additionally, it proposes detailed systems that can be implemented to enhance water availability and distribution throughout the country. These measures are crucial steps toward mitigating the water crisis and ensuring a sustainable water future for India.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"45 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139267211","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

Enzymatic Treatment of Cotton Fabric for Desizing 对棉织物进行酶法退浆处理

Journal of Chemical Engineering Research Updates Pub Date : 2023-11-16 DOI: 10.15377/2409-983x.2023.10.3

A. Rafikov, Kamola Fayzullaeva, Tulkin E. Shonakhunov, D. Soyibova, Nataliya N. Yasinskaya

{"title":"Enzymatic Treatment of Cotton Fabric for Desizing","authors":"A. Rafikov, Kamola Fayzullaeva, Tulkin E. Shonakhunov, D. Soyibova, Nataliya N. Yasinskaya","doi":"10.15377/2409-983x.2023.10.3","DOIUrl":"https://doi.org/10.15377/2409-983x.2023.10.3","url":null,"abstract":"The possibility of softening the conditions of biochemical treatment to remove the sizing agent from the surface of the fibers in the preparation of cotton fabric for dyeing has been studied. The efficiency of the α-amylase enzyme was evaluated by the amount of sugars reduced in the modifying solution, as well as by the capillarity of the samples of the treated fabrics. The enzyme used is active towards starch starting from a low concentration (0.02 g/l) and low temperature (32°C). The effect of enzyme concentration from 0.02 to 6.0 g/l, solution pH from 4.5 to 8.5, temperature from 32 to 60°C on the amount of sugars in the solution after enzymatic treatment, and fabric capillarity was determined. Almost complete removal of sizing from the surface of fibers of the original fabric was achieved under moderate and mild processing conditions: α-amylase concentration 1.0÷5.0 g/l, pH=6.0÷7.0, temperature 50-55°C. Based on the dependence of the logarithm of the reaction rate on the reciprocal temperature, the activation energy of the desizing reaction was calculated, which turned out to be equal to E = 17.5 kJ/mol. The low activation energy shows that the desizing process is carried out under energetically favorable conditions with moderate heating. The surface morphology of treated and untreated samples of cotton fabric was studied by scanning electron microscopy. The removal of the adhesive substance from the surface of the fibers, the separation of individual fibers, and the smoothing of the fabric surface after treatment with an amylase solution were recorded.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"2 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139269050","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

Behavior in Oxidation at 1000°C of Carbon-Containing Equimolar CoNiFeMnCr Alloys Added with Hafnium or Tantalum with High Contents 加入高含量铪或钽的含碳等摩尔CoNiFeMnCr合金在1000℃下的氧化行为

Journal of Chemical Engineering Research Updates Pub Date : 2022-12-31 DOI: 10.15377/2409-983x.2022.09.7

P. Berthod

{"title":"Behavior in Oxidation at 1000°C of Carbon-Containing Equimolar CoNiFeMnCr Alloys Added with Hafnium or Tantalum with High Contents","authors":"P. Berthod","doi":"10.15377/2409-983x.2022.09.7","DOIUrl":"https://doi.org/10.15377/2409-983x.2022.09.7","url":null,"abstract":"In this work, HfC–and TaC–reinforced cast versions of the equimolar CoNiFeMnCr alloy (Cantor) were tested in oxidation at 1000°C in laboratory air. Chromium seemingly shared, with manganese, its role as a selectively oxidized element. The principal oxide to form externally was an M2O3 one in which Mn and Cr were present in various proportions depending on the proximity with the alloy’s surface. The HfC carbides close to the oxidation front were oxidized in situ in HfO2, with the release of carbon diffusing inwards after that and inducing the solid-state precipitation of blocky or acicular chromium carbides. The behavior of the TaC carbides present close to the oxidation front was different since they dissolved, and Ta diffused towards the oxidation front to form CrTaO4 oxides. Even after 50 hours at 1000°C, the subsurfaces were more or less deeply impoverished in Cr and Mn, with minimal contents meager, especially for Mn. The evaluation of the Cr and Mn quantities and the exploitation of results in terms of equivalent oxide thickness and kinetic oxidation constant demonstrates that the resistance of the alloys against oxidation is feeble and must be significantly improved to allow benefiting of the superior high-temperature mechanical resistances of such alloys in practical application. For that, some ways are proposed.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115234459","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

Experimental Verification for Numerical Flow Analysis in Mixing Vessel 混合容器内流动数值分析的实验验证

Journal of Chemical Engineering Research Updates Pub Date : 2022-12-14 DOI: 10.15377/2409-983x.2022.09.5

Masaya Kano, Haruki Furukawa, Y. Kato, Y. Tanemori, Yuya Shudo, T. Mitome, Tsuyoshi Yamada, Kazuhiro Yamashita

引用次数: 0

The Influence of Concentration on the Formation of Chemical Bath Deposited Copper Tin Sulphide Thin Films: SEM and EDX Studies 浓度对化学浴沉积铜锡硫化薄膜形成的影响:SEM和EDX研究

Journal of Chemical Engineering Research Updates Pub Date : 2022-08-24 DOI: 10.15377/2409-983x.2022.09.3

H. Soonmin

引用次数: 0

Validation of Solar Dehydrator for Food Drying Applications: A Granny Smith Apple Study 太阳能脱水机用于食品干燥应用的验证:史密斯奶奶苹果研究

Journal of Chemical Engineering Research Updates Pub Date : 2022-07-22 DOI: 10.15377/2409-983x.2022.09.2

Jude Ingham, Muskan Kanungo, Brandon Beauchamp, Michael Korbut, M. Swedish, M. Navin, Wujie Zhang

{"title":"Validation of Solar Dehydrator for Food Drying Applications: A Granny Smith Apple Study","authors":"Jude Ingham, Muskan Kanungo, Brandon Beauchamp, Michael Korbut, M. Swedish, M. Navin, Wujie Zhang","doi":"10.15377/2409-983x.2022.09.2","DOIUrl":"https://doi.org/10.15377/2409-983x.2022.09.2","url":null,"abstract":"Food loss is a global issue that may be alleviated with effective dehydration strategies. Solar dehydration, rather than traditional sun-drying, is one method that could allow for the safe, efficient preservation of food materials. In this study, passive solar dehydration was achieved using a psychrometric chamber to model the environment of sub-Saharan Africa, where the temperature was the major focus (24.3 °C to 29.4 °C). A mass decrease of 88.56% was achieved within 9 hours. Microbial testing (total aerobic bacteria, Gram-negative bacteria, and total yeasts and molds) demonstrated no difference (all negative) between food stored at 4 °C and dehydrated food, indicating that the dehydrator introduced no new contamination. A 16.0% decrease in vitamin C (VC) concentration was observed due to the lability of VC. Insight into the visual appeal of the food samples was provided by measuring browning values, where it was found that dehydrated green apples are significantly less brown than the sample exposed to air for the same length of time. Passive solar dehydrators could provide a simple method to reduce food waste and maintain nutritional content and visual appeal.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129698872","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

Photocatalytic Reduction of Cr(VI) and Degradation of Organic Pollutants by Z-Scheme g-C3N4/Bi2S3 Heterojunction Z-Scheme g-C3N4/Bi2S3异质结光催化还原Cr(VI)及降解有机污染物

Journal of Chemical Engineering Research Updates Pub Date : 2022-03-23 DOI: 10.15377/2409-983x.2022.09.1

Lin-Lin Ding, Ying Deng, Xing Liu, Lingling Liu, Jingjing Ding, Fangyuan Deng

{"title":"Photocatalytic Reduction of Cr(VI) and Degradation of Organic Pollutants by Z-Scheme g-C3N4/Bi2S3 Heterojunction","authors":"Lin-Lin Ding, Ying Deng, Xing Liu, Lingling Liu, Jingjing Ding, Fangyuan Deng","doi":"10.15377/2409-983x.2022.09.1","DOIUrl":"https://doi.org/10.15377/2409-983x.2022.09.1","url":null,"abstract":"Photocatalytic reduction of hexavalent Cr(VI) couping oxidative degradation of organic contamination is an emerging and practical approach for water treatment. In this study, Z-scheme g-C3N4/Bi2S3 heterojunctions with intimate interface were successfully synthesized by direct growth of Bi2S3 on g-C3N4 surface. Notably, the photocatalytic performance of Z-scheme g-C3N4/Bi2S3 was influenced by g-C3N4 content. The optimized 2% g-C3N4/Bi2S3 heterojunction shows the highest photocatalytic reduction performance with 93.4% reduction efficiency of Cr(VI) under UV-visible light due to efficient separation and transfer of charge carriers and proper band structure. Furthermore, 2% g-C3N4/Bi2S3 can degrade tetracycline and Rhodamine B. Free radical capturing and quantitative tests indicate that holes and superoxide radicals are primary active species for the degradation of organic pollutants, while Cr(VI) was reduced to Cr(III) by the photogenerated electrons. Overall, this study provides new insight into the synthesis of high-performance Z-scheme heterojunctions for the future advancement of photocatalysis technology.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123798307","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: 1

Synthesis and Potential Applications of Modified Xanthan Gum 改性黄原胶的合成及其应用前景

Journal of Chemical Engineering Research Updates Pub Date : 2021-12-27 DOI: 10.15377/2409-983x.2021.08.6

Mahmoud H. Abu Elella

引用次数: 1

A Pilot Study of a Hybrid Process Involving In Situ Regenerated Activated Carbon, Membrane Separation and Advanced Oxidation for Water Pollution Abatement 原位再生活性炭-膜分离-深度氧化复合工艺用于水污染治理的中试研究

Journal of Chemical Engineering Research Updates Pub Date : 2021-12-05 DOI: 10.15377/2409-983x.2021.08.5

Vasilis C. Sarasidis, K. Plakas, A. Karabelas

{"title":"A Pilot Study of a Hybrid Process Involving In Situ Regenerated Activated Carbon, Membrane Separation and Advanced Oxidation for Water Pollution Abatement","authors":"Vasilis C. Sarasidis, K. Plakas, A. Karabelas","doi":"10.15377/2409-983x.2021.08.5","DOIUrl":"https://doi.org/10.15377/2409-983x.2021.08.5","url":null,"abstract":"The assessment of a pilot-scale hybrid system coupling powdered activated carbon (PAC) adsorption with membrane ultrafiltration (UF), in respect of activated carbon regeneration and organic micropollutant removal, was investigated in this study. Field tests with two adsorbents (i.e. a commercial PAC and a PAC-Fe(II) composite), conducted in the premises of Thessaloniki Water Treatment Plant, demonstrated the high efficiency of the combined PAC/UF process. Regeneration efficiencies varying between approximately 95% and 110%, complete diclofenac (DCF) degradation and rather moderate mineralization (TOC removal) rates of up to 47%, can be achieved by UVC/H2O2 or photo-Fenton oxidation after 4 hours of treatment; this performance is attributed to the in situ generation of reactive oxidant species by photolysis of H2O2, which seems to enhance the process effectiveness. Among the two adsorbent materials tested, composite PAC-Fe(II) exhibited a higher DCF adsorption capacity than the original PAC, probably due to the improved chemisorption and/or the electrostatic attractive interactions between the negatively charged DCF molecules and the positively charged iron species, at neutral pH. Furthermore, a rather insignificant effect of PAC-Fe(II) loading on the regeneration efficiency was observed. The advantages of totally controlled H2O2 dosages and short operating times render the hybrid PAC/UF system a promising alternative to conventional and advanced drinking water purification methods.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600346","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

Design of Experiment Method – An Application in Improving Quality of Magnesium Hydroxide Produced from Natural Seawater Bittern 实验方法的设计——在提高天然海水卤水生产氢氧化镁产品质量中的应用

Journal of Chemical Engineering Research Updates Pub Date : 2021-11-30 DOI: 10.15377/2409-983x.2021.08.4

Tam Le-Minh, Nam Hoang Dong, Dzung Nguyen Tan

{"title":"Design of Experiment Method – An Application in Improving Quality of Magnesium Hydroxide Produced from Natural Seawater Bittern","authors":"Tam Le-Minh, Nam Hoang Dong, Dzung Nguyen Tan","doi":"10.15377/2409-983x.2021.08.4","DOIUrl":"https://doi.org/10.15377/2409-983x.2021.08.4","url":null,"abstract":"Seawater bittern is an important resource for production of magnesium hydroxide. It is particularly meaningful for countries of which long beaches and high temperatures are available as natural advantages. This production process bases on the main reaction between solutions containing magnesium and various alkaline agents. Among of precipitants, lime slurry is frequently used as an inexpensive reactant. However, the contamination of calcium in the final magnesium hydroxide is a major problem which limits applicability of this product in many fields required extremely high quality of magnesium hydroxide such as pharmaceuticals, and catalyst, etc. In this work, magnesium hydroxide with more than 99% purity will be recovered from natural seawater bitterns by using the design of experiment (DOE) method. Selected from nine potential factors, a full factorial design considering four main effects was applied to construct a second-order regression model which allows predicting favorable conditions to pursuit high purity of magnesium hydroxide from multi-component seawater bittern and lime milk. On the one hand, the results for a 1.0 L batch investigation proved that factors such as concentration of Ca(OH)2 in lime suspension and residence time have strong negative influences on the product purity, besides positive effects of reaction temperature. On the other hand, magnesium concentration in the bittern was absent in the regression model. At the optimal conditions, the chemical purity of the solid product was obtained at a value of 99.35%. Thus, this product, and therefore its corresponding production conditions, can be recommended for applications required high quality of magnesium hydroxide.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116786813","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: 1