Green and Sustainable Chemistry最新文献_第7页

Passive Remediation of Acid Mine Drainage Using Ball-Milling Modified Indonesian Natural Bentonite: Laboratory Batch and Column Sorption of Manganese 球磨改性印尼天然膨润土对酸性矿山废水的被动修复:实验室批式和柱式锰吸附

Green and Sustainable Chemistry Pub Date : 2018-10-10 DOI: 10.4236/gsc.2018.84020

Widyawanto Prastistho, W. Kurniawan, H. Hinode

{"title":"Passive Remediation of Acid Mine Drainage Using Ball-Milling Modified Indonesian Natural Bentonite: Laboratory Batch and Column Sorption of Manganese","authors":"Widyawanto Prastistho, W. Kurniawan, H. Hinode","doi":"10.4236/gsc.2018.84020","DOIUrl":"https://doi.org/10.4236/gsc.2018.84020","url":null,"abstract":"Manganese (Mn) is an essential element for human body. However, elevated concentration of manganese causes severe problem and disease. Acid mine drainage (AMD), wastewater generated due to open-pit mining, commonly contains Mn with exceeded concentration. This study is to investigate the improvement of ball-milling modified Indonesian natural bentonite (INB) for manganese (Mn) removal from AMD and to increase the pH through batch and column sorption test as a passive treatment system approach. The batch sorption test result showed the maximum Mn adsorbed (Qm) on INB from the Langmuir model increased from 4.69 to 17.12 mg/g after milling. The column sorption test result also showed the amount of Mn adsorbed on INB until breakthrough time (qu) and until saturation time (q) increased after milling. The qu increased from 1.27 to 10.06 mg/g, and the q increased from 4.55 to 12.91 mg/g. The mass transfer zone (MTZ) became significantly shorter after milling from 0.22 to 0.07 cm. The Thomas model exhibited the equilibrium uptake of Mn (q0) increased after milling from 3.91 to 13.72 mg/g. In equilibrium condition, both unmilled and milled INB showed the pH increased from ≈3 to 8.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"216 1","pages":"295-310"},"PeriodicalIF":0.0,"publicationDate":"2018-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75593662","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: 2

A Mild and Efficient Method for the Synthesis of Acylals from Aromatic Aldehydes and Their Deprotections Catalyzed by Synthetic Phosphates under Solvent-Free Conditions 一种在无溶剂条件下由芳香醛合成酰基的温和高效方法及其在合成磷酸盐催化下的脱保护反应

Green and Sustainable Chemistry Pub Date : 2018-10-09 DOI: 10.4236/gsc.2018.84023

F. Bazi, B. Mounir, M. Hamza, S. Sebti

引用次数: 1

Biochemical Methane Potential of Food Wastes from Akouedo Landfill, Côte d’Ivoire Akouedo垃圾填埋场食物垃圾的生化甲烷潜力，Côte科特迪瓦

Green and Sustainable Chemistry Pub Date : 2018-08-24 DOI: 10.4236/GSC.2018.83019

Kouadio Marc Cyril, Kouakou Adjoumani Rodrigue, Kra Essi, Trokourey Albert, Akichi Agboue

引用次数: 2

Synthesis and Characterisation of a Biolubricant from Cameroon Palm Kernel Seed Oil Using a Locally Produced Base Catalyst from Plantain Peelings 喀麦隆棕榈仁籽油生物润滑剂的合成与表征

Green and Sustainable Chemistry Pub Date : 2018-08-02 DOI: 10.4236/GSC.2018.83018

M. Alang, M. Ndikontar, Y. Sani, P. Ndifon

{"title":"Synthesis and Characterisation of a Biolubricant from Cameroon Palm Kernel Seed Oil Using a Locally Produced Base Catalyst from Plantain Peelings","authors":"M. Alang, M. Ndikontar, Y. Sani, P. Ndifon","doi":"10.4236/GSC.2018.83018","DOIUrl":"https://doi.org/10.4236/GSC.2018.83018","url":null,"abstract":"Biolubricant was synthesized from Cameroon palm kernel oil (PKO) by double transesterification, producing methyl esters in the first stage which were then transesterified with trimethylolpropane (TMP) to give the PKO biolubricant in the presence of a base catalyst obtained from plantain peelings (municipal waste). The yields from both catalysts were significantly similar (48% for the locally produced and 51% for the conventional) showing that the locally produced catalyst could be valorized. The synthesized biolubricant was characterized by measuring its physical and chemical properties. The specific gravity of 1.2, ASTM color of 1.5, cloud point of 0°C, pour point of -9°C, viscosities at 40°C of 509.80 cSt and at 100°C of 30.80 cSt, viscosity index of 120, flash point greater than 210°C and a fire point greater than 220°C were obtained. This synthesized biolubricant was found to be comparable to commercial T-46 petroleum lubricant sample produced industrially from mineral sources. We have therefore used local materials to produce a biolubricant using a cheap base catalyst produced from municipal waste.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"23 1","pages":"275-287"},"PeriodicalIF":0.0,"publicationDate":"2018-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73293444","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: 20

A Novel Process Using Ion Exchange Resins for the Coproduction of Ethyl and Butyl Acetates 离子交换树脂协同生产乙酸乙酯和乙酸丁酯的新工艺

Green and Sustainable Chemistry Pub Date : 2018-07-31 DOI: 10.4236/GSC.2018.83016

Nydia Ileana Guzman Barrera, Cecile Bories, J. Peydecastaing, C. Sablayrolles, E. Vedrenne, C. Vaca-Garcia, S. Thiebaud-Roux

{"title":"A Novel Process Using Ion Exchange Resins for the Coproduction of Ethyl and Butyl Acetates","authors":"Nydia Ileana Guzman Barrera, Cecile Bories, J. Peydecastaing, C. Sablayrolles, E. Vedrenne, C. Vaca-Garcia, S. Thiebaud-Roux","doi":"10.4236/GSC.2018.83016","DOIUrl":"https://doi.org/10.4236/GSC.2018.83016","url":null,"abstract":"Before proposing an innovative process for the coproduction of ethyl and butyl acetates, the individual syntheses of ethyl acetate and butyl acetate by two different routes were first studied. These syntheses involved the reaction of ethanol or n-butanol with acetic acid or acetic anhydride in the presence of ion exchange resins: Amberlyst 15, Amberlyst 16, Amberlyst 36 and Dowex 50WX8. Kinetic and thermodynamic studies were performed with all resins. The lowest activation energy (Ea) value was obtained with Dowex 50WX8, which was identified as the best-performing resin, able to be reused at least in four runs without regeneration. The presence of water-azeotropes during the synthesis of ethyl acetate makes its purification difficult. A new strategy was adopted here, involving the use of ethanol and acetic anhydride as the starting material. In order to minimize acetic acid as co-product of this reaction, a novel two-step process for the coproduction of ethyl and butyl acetates was developed. The first step involves the production of ethyl acetate and its purification. Butyl acetate was produced in the second step: n-butanol was added to the mixture of acetic acid and the resin remaining after the first-step distillation. This process yields ethyl acetate and butyl acetate at high purity and shows an environmental benefit over the independent syntheses by green metrics calculation and life cycle assessment.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"65 1","pages":"221-246"},"PeriodicalIF":0.0,"publicationDate":"2018-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72793516","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

Functional Organo-Nano Particles by RAFT Copolymerisation RAFT共聚的功能有机纳米颗粒

Green and Sustainable Chemistry Pub Date : 2018-07-31 DOI: 10.4236/gsc.2018.83017

H. Langhals, Dominik Zgela, Arthur Haffner, C. Koschnick, K. Gottschling, C. Paulik

引用次数: 0

Sodium-Modified Fluorapatite: A Mild and Efficient Reusable Catalyst for the Synthesis of α,α’-Bis(Substituted Benzylidene) Cycloalkanones under Conventional Heating and Microwave Irradiation 钠修饰氟磷灰石:一种温和高效的可重复使用催化剂，用于常规加热和微波辐射合成α，α′-双(取代苄基)环烷酮

Green and Sustainable Chemistry Pub Date : 2018-05-02 DOI: 10.4236/GSC.2018.82011

B. Mounir, F. Bazi, Abddelfetah Mounir, H. Toufik, M. Zahouily

引用次数: 5

Henry Reaction between Benzaldehyde and Nitromethane over Solid Base Catalysts: A Green Protocol 苯甲醛和硝基甲烷在固体碱催化剂上的亨利反应:一个绿色方案

Green and Sustainable Chemistry Pub Date : 2018-05-02 DOI: 10.4236/GSC.2018.82010

M. Abdellattif, H. M. Mohamed

{"title":"Henry Reaction between Benzaldehyde and Nitromethane over Solid Base Catalysts: A Green Protocol","authors":"M. Abdellattif, H. M. Mohamed","doi":"10.4236/GSC.2018.82010","DOIUrl":"https://doi.org/10.4236/GSC.2018.82010","url":null,"abstract":"The development of environmentally benign solid base catalysts instead of the soluble bases for C-C bond formation in organic reactions especially Henry reactions with nitroalkanes compounds is of intense research activity in the bulk and fine chemical chemistry in order to achieve the selectivity of the desired product and the reduction of the salts formed due to soluble bases neutralization. While using of LDHs catalysts in the synthesis of nitro alcohols is of great interest because LDHs (double layered hydroxides) is of unique properties and an excellent catalytic property. The nitroalcohols are obtained in a very good yield while using catalyst either by conventional at 90°C in liquid phase, microwave or sonoenergy without solvent methods, and the results yields are compared. A series of different nitro alcohols from (a - o) were prepared, the catalytic test reaction were carried out using benzaldehyde and their derivatives with nitromethane and their derivatives. A series of LDHs catalysts were prepared also and studying of the catalytic effect on the reactions was carried out. Properties of the compounds prepared were characterized by IR, MNR, and GC-MS.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"1 1","pages":"139-155"},"PeriodicalIF":0.0,"publicationDate":"2018-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79191962","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: 3

Efficient Solvent- and Catalyst-Free Syntheses of Imine Derivatives Applying the Pressure Reduction Technique: Remarkable Change of the Reaction Rate with the Phase Transition 应用减压技术无溶剂无催化剂高效合成亚胺衍生物:反应速率随相变的显著变化

Green and Sustainable Chemistry Pub Date : 2018-05-02 DOI: 10.4236/gsc.2018.82012

Shoko Suzuki, S. Sakaki, S. Ishizuka, T. Nishino, Hiroyuki Ito, R. Nonaka, M. Noike, T. Kodama, Hajime Nozaka, Tsuneyuki Sato, Hitoshi Agematsu, K. Maruyama, Shun Oyamada, T. Kuroishi, Kazuma Sasaki, Keisuke Yagawa, M. Yoshioka, Y. Yokoyama*

{"title":"Efficient Solvent- and Catalyst-Free Syntheses of Imine Derivatives Applying the Pressure Reduction Technique: Remarkable Change of the Reaction Rate with the Phase Transition","authors":"Shoko Suzuki, S. Sakaki, S. Ishizuka, T. Nishino, Hiroyuki Ito, R. Nonaka, M. Noike, T. Kodama, Hajime Nozaka, Tsuneyuki Sato, Hitoshi Agematsu, K. Maruyama, Shun Oyamada, T. Kuroishi, Kazuma Sasaki, Keisuke Yagawa, M. Yoshioka, Y. Yokoyama*","doi":"10.4236/gsc.2018.82012","DOIUrl":"https://doi.org/10.4236/gsc.2018.82012","url":null,"abstract":"Because imines could be used as convenient starting materials in various fields, the development of an easy synthetic method of imine was strongly desired. In response to this demand, we thought that it would be an effective synthesis method if an aldehyde and an amine could be reacted to give an imine in good yield under solvent- and catalyst-free conditions. In fact, we tried the reaction of benzaldehyde with various amines under solvent- and catalyst-free conditions followed by removal of water that was produced in the reaction system by a vacuum pump, and desired imines could be obtained in good yields. Observation of this reaction using a nuclear magnetic resonance spectrometer revealed that the reaction rate was extremely fast at the initial stage but slowed over time. However, the reaction of benzaldehyde with aniline differed greatly, and the reaction rate dramatically improved in 47 - 48 minutes after the start of the reaction. At this time, we found that the reaction system underwent a phase transition from the liquid phase to the solid phase.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"8 1","pages":"167-179"},"PeriodicalIF":0.0,"publicationDate":"2018-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85868138","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: 5

Valorization of Solid Waste Recovery in an Institution of Higher Education 高等院校固体废物回收的价值评估

Green and Sustainable Chemistry Pub Date : 2018-05-02 DOI: 10.4236/GSC.2018.82013

N. Munguia, Angela Diaz, L. Velazquez, R. Perez, J. Esquer, David S. Zepeda

{"title":"Valorization of Solid Waste Recovery in an Institution of Higher Education","authors":"N. Munguia, Angela Diaz, L. Velazquez, R. Perez, J. Esquer, David S. Zepeda","doi":"10.4236/GSC.2018.82013","DOIUrl":"https://doi.org/10.4236/GSC.2018.82013","url":null,"abstract":"One of the biggest challenges for organizations, cities and countries is waste management. Currently, 1.3 million tons of solid wastes are generated in the cities and by 2025 it is estimated that this volume will increase up to 2.2 billion tons. Considering this, it is clear that strategies for the reduction of waste generation are needed. In order to achieve this arduous and critic task changes in education, culture and public policy are required and one of the strategies that emerge as one of the most effective is the “zero waste” programs. This paper shows the foundation of a zero waste program based on previous and successful experiences in institutions of higher education. It presents the characterization and quantification of waste, as well as the valorization of it and potential environmental and economic benefits of the implementation of this kind of programs in higher education institutions. Results show that reduction and valorization of waste generation is possible in academic sectors while other outcomes emerge, such as the generation of human capital for the implementation of this kind of programs in different sectors of society and, in that way, contribute in the transition towards sustainable development.","PeriodicalId":12770,"journal":{"name":"Green and Sustainable Chemistry","volume":"47 1","pages":"180-189"},"PeriodicalIF":0.0,"publicationDate":"2018-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76334670","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: 4