iranica journal of energy and environment最新文献_第8页

Sensitivity Analysis for Water Hammer Problem in Pipelines 管道水锤问题的敏感性分析

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.03

Behnam Mansuri, F. Salmasi, Behrooz Oghati

引用次数: 7

Heavy Metals and Water Quality Assessment Using Multivariate Statistical Techniques and Water Quality Index of the Semenyih River, Peninsular Malaysia 基于多元统计技术和水质指数的马来西亚半岛Semenyih河重金属与水质评价

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.04

F. Al-Badaii, M. Shuhaimi-Othman

引用次数: 20

A Novel Approach to Investigate Adsorption of Crystal Violet from Aqueous Solutions Using Peels of Annona Squamosa 研究番荔枝皮吸附结晶紫的新方法

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.02

K. Mahalakshmi, S. Suja, S. Mathiya, G. Kalaivani

{"title":"A Novel Approach to Investigate Adsorption of Crystal Violet from Aqueous Solutions Using Peels of Annona Squamosa","authors":"K. Mahalakshmi, S. Suja, S. Mathiya, G. Kalaivani","doi":"10.5829/IDOSI.IJEE.2014.05.02.02","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.02","url":null,"abstract":"An effective and economical adsorbent was prepared from the peels of Annonasquamosafor the removal of crystal violet from aqueous solutions. Adsorption studies were carried out using batch experiments. The dependence of initial dye concentration, pH, contact time, particle size and temperature on the adsorption process was studied. The crystal violet was found to be electroactive and hence electrochemical studies were also performed. The study showed that the equilibrium was achieved within 60 min for the different initial concentrations (10 to 30 mg.l ). The equilibrium adsorption data were analyzed using various isotherm models 1 and they were found to fit Langmuir, Freundlich, Temkin and Harkins-Jura isotherm models in varying orders of magnitude. The maximum dye adsorption capacitiesfor cyclic voltammetry and spectral studiesat 303 K were found to be 5.6818 × 10 A.g (in terms of current)and 5×10 mg.g (in terms of weight),respectively. The data 41 4 1 suggested that the adsorption kinetics was best represented by pseudo-second order kinetic model. The thermodynamic parameters including G, H and S for the adsorption process have also been evaluated using which it was concluded that the process of adsorption was spontaneous and endothermic. The cyclic voltammetricand spectral studies yielded similar results. Furthermore, statistical analysis also showed the absence of any significant difference between the two methods.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86857058","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: 9

Surface Modification of Carbon Nanotubes Using Acid Treatment to Enhance Gas Separation Performance of Hybrid Nanocomposite Mixed Matrix Membrane 酸处理对碳纳米管表面进行改性以提高纳米复合混合基质膜的气体分离性能

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.06

T. Kusworo

{"title":"Surface Modification of Carbon Nanotubes Using Acid Treatment to Enhance Gas Separation Performance of Hybrid Nanocomposite Mixed Matrix Membrane","authors":"T. Kusworo","doi":"10.5829/IDOSI.IJEE.2014.05.02.06","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.06","url":null,"abstract":"Recently, many researchers have explored the idea of hybrid mixed matrix membranes. Membrane separation processes based on hybrid mixed matrix membrane comprising inorganic material such as zeolite and carbon nanotubes (CNTs) embedded in polymer matrix have become one of the emerging technologies and extensively discussed in membrane separation literature. The present study is performed primarily to investigate the effect of chemical modification on carbon nanotubes surface towards gas separation performance of mixed matrix membrane. Polyethersulfone (PES)-carbon nanotubes mixed matrix membrane for modified and unmodified carbon nanotubes were casted using dry/wet phase inversion technique. The modified carbon nanotubes were prepared by treating the carbon nanotubes with acid treatment to allow PES chains to be attached to carbon nanotubes surface. The results of FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Meanwhile, the nanogaps in the interface of polymer and carbon nanotubes were appeared in the PES mixed matrix membrane with unmodified of carbon nanotubes. The modified carbon nanotubes mixed matrix membrane increases the mechanical properties, the productivity and purity of gas mixture compare to neat PES and unmodified carbon nanotubes mixed matrix membrane. For PES-modified carbon nanotubes mixed matrix membrane the maximum selectivity achieved for CO /CH are 24 32.59.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85155982","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

Application of Partial-Mixed Semi-Continuous Anaerobic Reactor for Treating Palm Oil Mill Effluent (POME) Under Mesophilic Condition 部分混合半连续厌氧反应器在中温条件下处理棕榈油厂废水的应用

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.13

C. K. Weng, Norli Ismail, Anees Ahmad

引用次数: 1

Seasonal Variations and Sources of Heavy Metals in Free Fall Dust in an Industrial City of Western India 印度西部一个工业城市自由落体粉尘中重金属的季节变化和来源

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.07

M. Meena, B. Meena, Uttra Ch, A. Rani

引用次数: 7

Characterisation of Liquid Derived from Pyrolysis Process of Charcoal Production in South of Thailand 泰国南部木炭生产热解过程中产生的液体表征

iranica journal of energy and environment Pub Date : 2014-04-01 DOI: 10.5829/IDOSI.IJEE.2014.05.02.10

A. Saad, S. B. Ratanwilai

{"title":"Characterisation of Liquid Derived from Pyrolysis Process of Charcoal Production in South of Thailand","authors":"A. Saad, S. B. Ratanwilai","doi":"10.5829/IDOSI.IJEE.2014.05.02.10","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.10","url":null,"abstract":"Pyrolysis liquid obtained from local suppliers in Phatthalung Province, Thailand was separated in conventional vacuum distillation into light and heavy fractions. The physiochemical characteristics and thermal behaviour of the fractionated pyrolysis liquid were investigated. It was found that light fraction had higherwater content and stronger acidity than heavy fraction and pyrolysis liquid. The heating value of light fraction was lower than those of the pyrolysis liquid andhea vy fraction. The heating value of heavy portion was almost double that of the light fraction. The thermal behaviours of the pyrolysis liquid and the two fractions were determined. The light fraction had the highest decomposition rate and the lowest residual yield; in contrast to heavy fraction had slow weight loss through a wide range of temperatures and it had the highest residual yield. The chemical composition of the pyrolysis liquid and the two fractionswere analysed by GC-MS. The chemical distribution differed for the fractions and the pyrolysis liquid. The light fraction was dominated by acetic acid and the heavy fraction was mainly composed phenolic compounds.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82952670","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

New Vegetal Biopolymeric Flocculant: A Degradation and Flocculation Study 新型植物生物高分子絮凝剂的降解与絮凝研究

iranica journal of energy and environment Pub Date : 2014-01-01 DOI: 10.5829/IDOSI.IJEE.2014.05.01.05

I. Norli, N. Morad

{"title":"New Vegetal Biopolymeric Flocculant: A Degradation and Flocculation Study","authors":"I. Norli, N. Morad","doi":"10.5829/IDOSI.IJEE.2014.05.01.05","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.01.05","url":null,"abstract":"Polyacrylamide (PAM) is known to pose a hazard to human health. A newly explored plant-based flocculant, malva nut gum (MNG) is hypothesized to treat water and as a green material. This study investigates the biodegradation, thermal degradation and photodegradation of MNG and its flocculation capability. The results show MNG has a high biodegradation rate and low oxygen consumption rate. MNG biodegraded at Day-17, whilst, PAM did not show completion of biodegradation by the end of the experiment. Thermal degradation analysis shows MNG has a few decomposition stages and ash content. The photodegradation analysis shows photochemical changes in the structure of MNG and PAM. Factorial experiments show pH, concentration of cation and the concentration of MNG were the influential factors in coagulation-flocculation process. Optimization study observed 97% turbidity reduction at pH 5.77, the concentration of cation at 0.05 mM and the concentration of MNG at 0.42 mg/L. Conclusively, MNG operates effectively at near neutral pH and at low concentration. Such results strongly suggest that MNG is a suitable candidate, which could be used to replace PAM, as flocculant in water treatment.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82332834","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: 9

Leachate Pollutants Adsorption Using Potassium Hydroxide and Surfactant Modified Bentonite for Possible Use as Slow Release Fertiliser 氢氧化钾和表面活性剂改性膨润土对渗滤液污染物的吸附研究

iranica journal of energy and environment Pub Date : 2014-01-01 DOI: 10.5829/IDOSI.IJEE.2014.05.03.05

Syafalni

引用次数: 0

Isolation Purification and Screening of Biodegradable Polymer PHB Producing Cyanobacteria from Marine and Fresh Water Resources 海洋和淡水资源中产蓝藻生物可降解聚合物PHB的分离、纯化和筛选

iranica journal of energy and environment Pub Date : 2014-01-01 DOI: 10.5829/IDOSI.IJEE.2014.05.01.14

K. Gopi, S. Balaji, B. Muthuvelan

{"title":"Isolation Purification and Screening of Biodegradable Polymer PHB Producing Cyanobacteria from Marine and Fresh Water Resources","authors":"K. Gopi, S. Balaji, B. Muthuvelan","doi":"10.5829/IDOSI.IJEE.2014.05.01.14","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.01.14","url":null,"abstract":"Fifteen cyanobacteria species were isolated from fresh water and marine water resources from different parts of Tamil Nadu, India. Based on their morphological features they were identified through microscopic observations. The isolates were then screened for PHB production using nile red staining. It was found eleven of them were capable of producing PHB in their native forms. Further, PHB quantitative analysis by HPLC showed marine Phormidium sp with 7.60±0.005 mg/L (7.6%) of PHB, followed by Synechococcus sp with 4.59±0.012 mg/L (4.5%), Synechocystis sp with 3.74±0.007 mg/L (3.7%) and Anabaena sp with 2.31±0.012 mg/L (2.3%) of fresh water isolates. Among the isolates, Phormidium sp (VIT-BMN3) isolated from marine environments is reporting first time for its PHB production. In addition, biodegradable polymer extracted in hot chloroform is analysed by FTIR which showed strong bands near 1725 cm , 2977 cm and 3437 cm wave 11 1 numbers and confirms the presence of ester carbonyl group (C=O), methylene C-H vibration and terminal OH group of PHB, respectively. Overall, nile red staining, HPLC analysis and FTIR spectrums obtained for all cultures conforms the PHB production by our isolates in their native conditions. Further studies of media optimization for increased PHB production are under the process.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87929506","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: 25