Pub Date : 2014-07-01DOI: 10.5829/IDOSI.IJEE.2014.05.03.02
P. Rejani, A. Radhakrishnan, B. Beena
ZnO nano rod was prepared by microwave assisted method. The crystal structure of the nano powders were confirmed by X-Ray diffraction analysis and the mean particle size was estimated by the Scherrer's formula. The surface morphology of the nano particles were analyzed by SEM and TEM. The absorption spectrum of the material in the UV-Vis range was recorded. The prepared ZnO rod was used as a photocatalyst in presence of UV light against Malachite Green dye. The ZnO nanoparticle was found to be an efficient low cost photocatalyst which degraded Malachite Green dye in presence of UV light in a relatively short period of time.
{"title":"Photo Catalytic Decomposition of Malachite Green in Aqueous Solutions under UV Irradition Using Nano ZnO Rod","authors":"P. Rejani, A. Radhakrishnan, B. Beena","doi":"10.5829/IDOSI.IJEE.2014.05.03.02","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.03.02","url":null,"abstract":"ZnO nano rod was prepared by microwave assisted method. The crystal structure of the nano powders were confirmed by X-Ray diffraction analysis and the mean particle size was estimated by the Scherrer's formula. The surface morphology of the nano particles were analyzed by SEM and TEM. The absorption spectrum of the material in the UV-Vis range was recorded. The prepared ZnO rod was used as a photocatalyst in presence of UV light against Malachite Green dye. The ZnO nanoparticle was found to be an efficient low cost photocatalyst which degraded Malachite Green dye in presence of UV light in a relatively short period of time.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"84 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77187991","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}
Pub Date : 2014-07-01DOI: 10.5829/IDOSI.IJEE.2014.05.03.04
A. Ismailova, A. Zhamangara, Park S. Ya, A. Abakumov, A. Adamov, R. Muratov
The information-analytical system (IAS) "Monitoring of aquatic ecosystems" was developed for the analysis of ecological lakes condition in Kazakhstan. It consists of a database on hydrochemical and hydrobiological characteristics for lakes Burabai and Ulken Shabakty in Shchuchinsk-Borovoye resort area of the Republic of Kazakhstan, as well as a set of statistical data processing methods. Qualitative analysis of data was made on the lakes. Data on biogenic substances for the years 2007-2013 were analyzed based on statistics. Dynamic characteristics and seasonal features of changes were identified in the concentrations of biogens. There is an absence of significant relationships between the concentrations of various biogenic substances in lakes and between lakes. Nitrogen substances were compared. The phosphorus compounds have a large stability that can contribute to a more stable life of phytoplankton species which are related to phosphorus.
{"title":"Analysis of Ecological Condition of Lakes Burabai and Ulken Shabakty in Republic of Kazakhstan","authors":"A. Ismailova, A. Zhamangara, Park S. Ya, A. Abakumov, A. Adamov, R. Muratov","doi":"10.5829/IDOSI.IJEE.2014.05.03.04","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.03.04","url":null,"abstract":"The information-analytical system (IAS) \"Monitoring of aquatic ecosystems\" was developed for the analysis of ecological lakes condition in Kazakhstan. It consists of a database on hydrochemical and hydrobiological characteristics for lakes Burabai and Ulken Shabakty in Shchuchinsk-Borovoye resort area of the Republic of Kazakhstan, as well as a set of statistical data processing methods. Qualitative analysis of data was made on the lakes. Data on biogenic substances for the years 2007-2013 were analyzed based on statistics. Dynamic characteristics and seasonal features of changes were identified in the concentrations of biogens. There is an absence of significant relationships between the concentrations of various biogenic substances in lakes and between lakes. Nitrogen substances were compared. The phosphorus compounds have a large stability that can contribute to a more stable life of phytoplankton species which are related to phosphorus.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78869343","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}
Pub Date : 2014-07-01DOI: 10.5829/IDOSI.IJEE.2014.05.03.01
H. Khorasanizadeh, A. Aghaei, H. Ehteram, R. D. Yazdeli, N. Hataminasar
The efficiency of the flat solar surfaces, such as thermal collectors and photovoltaic (PV) panels, depends on the received beam and diffuse radiation components and the angle of the beam incidence. In this study, based on the long term measured data tilt angle optimization of the flat solar surfaces in the city of Ilam, Iran, for the daily, monthly, seasonal and annual fixed adjustments have been performed. Study of characteristics of solar radiation showed that Ilam has 220 days in the year with horizontal global radiation in the range of 15-35 MJ/m and 182 sunny or very sunny days having daily clearness index higher than 0.6. 2 The optimum tilt for the fixed daily adjustment throughout the year varies between zero and 61° and the optimum tilt for the fixed monthly adjustment varies between 0° in June and July up to 60.1° in December. The optimum tilt for the fixed annual adjustment is 26°, which is close to latitude of Ilam (33.38°). Furthermore, the optimum tilt for the fixed seasonal adjustment in winter and autumn are 12.3 and 20° higher than the latitude of Ilam, respectively; whereas in spring and summer they are 30.3 and 21.1° less than the latitude, respectively.
{"title":"Attaining Optimum Tilts of Flat Solar Surfaces Utilizing Measured Solar Data: Case Study for Ilam, Iran","authors":"H. Khorasanizadeh, A. Aghaei, H. Ehteram, R. D. Yazdeli, N. Hataminasar","doi":"10.5829/IDOSI.IJEE.2014.05.03.01","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.03.01","url":null,"abstract":"The efficiency of the flat solar surfaces, such as thermal collectors and photovoltaic (PV) panels, depends on the received beam and diffuse radiation components and the angle of the beam incidence. In this study, based on the long term measured data tilt angle optimization of the flat solar surfaces in the city of Ilam, Iran, for the daily, monthly, seasonal and annual fixed adjustments have been performed. Study of characteristics of solar radiation showed that Ilam has 220 days in the year with horizontal global radiation in the range of 15-35 MJ/m and 182 sunny or very sunny days having daily clearness index higher than 0.6. 2 The optimum tilt for the fixed daily adjustment throughout the year varies between zero and 61° and the optimum tilt for the fixed monthly adjustment varies between 0° in June and July up to 60.1° in December. The optimum tilt for the fixed annual adjustment is 26°, which is close to latitude of Ilam (33.38°). Furthermore, the optimum tilt for the fixed seasonal adjustment in winter and autumn are 12.3 and 20° higher than the latitude of Ilam, respectively; whereas in spring and summer they are 30.3 and 21.1° less than the latitude, respectively.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85108859","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.11
Jokha Mohamed, S. Murimi, C. Kihampa
Agrochemicals nutrients and residues of pesticides in surface water and sediments samples of Weruweru sub-catchment were investigated to determine their concentrations and quality of water for human consumption. Plant nutrients NO , NO , NH and PO concentrations ranging from 0.005 to 0.96 mg/L were 323 4 - - -3 detected in surface water samples. Pesticides residues cyanazine, -chlordane, endosulfan sulphate, p,p'-DDT, p,p'-DDD, p,p'-DDE, lindane and cypermethrin concentrations ranging from below detection limit to 45.7 µg/l and below detection limit to 157 µg/kg dw were detected in surface water samples and sediments samples, respectively. In most sites, nutrients and pesticides residues concentrations were below the maximum limits as per WHO and national limits for drinking water. The agrochemical contaminants were considered to originate from agricultural runoff and weathered agricultural soils. All parameters were measured by standard methods.
{"title":"Degradation of Water Resources by Agricultural Pesticides and Nutrients, Weruweru, Tanzania","authors":"Jokha Mohamed, S. Murimi, C. Kihampa","doi":"10.5829/IDOSI.IJEE.2014.05.02.11","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.11","url":null,"abstract":"Agrochemicals nutrients and residues of pesticides in surface water and sediments samples of Weruweru sub-catchment were investigated to determine their concentrations and quality of water for human consumption. Plant nutrients NO , NO , NH and PO concentrations ranging from 0.005 to 0.96 mg/L were 323 4 - - -3 detected in surface water samples. Pesticides residues cyanazine, -chlordane, endosulfan sulphate, p,p'-DDT, p,p'-DDD, p,p'-DDE, lindane and cypermethrin concentrations ranging from below detection limit to 45.7 µg/l and below detection limit to 157 µg/kg dw were detected in surface water samples and sediments samples, respectively. In most sites, nutrients and pesticides residues concentrations were below the maximum limits as per WHO and national limits for drinking water. The agrochemical contaminants were considered to originate from agricultural runoff and weathered agricultural soils. All parameters were measured by standard methods.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82803561","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.14
Seyed Mahmoud Mehdinia, T. Rastgoo
The present study investigates the effectiveness of a new adsorbent prepared from agricultural wastes, namely rice husk silica as well as raw rice husk and rice bran to remove Cr from aquatic solutions. +6 The raw rice husk was collected from North of Iran. But rice husk silica was prepared by burning of clean rice husk inside a muffle furnace at a temperature of 800°C for 4 hours after acid leaching. The effects of four parameters: contact time (30 to 90 min), pH values (2 to 9), adsorbents dosages (0.5 to 1.5 g/L) and initial concentration (1.0 to 15 mg/L) were investigated to remove Cr . The silica derived from rice husk showed a +6 high percentage of SiO up to 94.24%. But Carbone was the highest element in raw rice husk up to 35.92%. 2 The maximum removal efficiency (RE) of Cr was obtained by rice bran up to 98.8% at 5.0 mg/L initial +6 concentration of Cr, 60 min of contact time, pH = 2 and adsorbents dosage of 1.0 g/L. However, at the same condition the maximum RE by raw rice husk and rice husk silica were 82.3 and 88.4%, respectively. Moreover, a negative strong significant correlation between increasing of initial concentration of Cr and RE was detected +6
{"title":"Rice Husk Silica Adsorbent for Removal of Hexavalent Chromium Pollution from Aquatic Solutions","authors":"Seyed Mahmoud Mehdinia, T. Rastgoo","doi":"10.5829/IDOSI.IJEE.2014.05.02.14","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.14","url":null,"abstract":"The present study investigates the effectiveness of a new adsorbent prepared from agricultural wastes, namely rice husk silica as well as raw rice husk and rice bran to remove Cr from aquatic solutions. +6 The raw rice husk was collected from North of Iran. But rice husk silica was prepared by burning of clean rice husk inside a muffle furnace at a temperature of 800°C for 4 hours after acid leaching. The effects of four parameters: contact time (30 to 90 min), pH values (2 to 9), adsorbents dosages (0.5 to 1.5 g/L) and initial concentration (1.0 to 15 mg/L) were investigated to remove Cr . The silica derived from rice husk showed a +6 high percentage of SiO up to 94.24%. But Carbone was the highest element in raw rice husk up to 35.92%. 2 The maximum removal efficiency (RE) of Cr was obtained by rice bran up to 98.8% at 5.0 mg/L initial +6 concentration of Cr, 60 min of contact time, pH = 2 and adsorbents dosage of 1.0 g/L. However, at the same condition the maximum RE by raw rice husk and rice husk silica were 82.3 and 88.4%, respectively. Moreover, a negative strong significant correlation between increasing of initial concentration of Cr and RE was detected +6","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":"90058551","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.09
H. Khorasanizadeh, K. Mohammadia, A. Aghaei
In this study, utilizing the obtaineddata from four distributed locations known asAbarkuh, Behabad, Halvan and Yazd, the solar energy potential and its characteristics in Yazd province of Iran have been evaluated. For the data, daily horizontal global radiation (HGR) and clearness index alsotheir monthly, seasonal and yearly averaged values have been obtained. The results indicate that the four locationsenjoy from 300, 294, 289 and 311 sunny and very sunny days; their yearly averaged daily clearness indexes are 0. 66, 0. 66, 0. 64 and 0. 67 and theiryearly averaged daily global radiations are 20. 74, 20. 78, 19. 52 and 20. 60 MJ/m , respectively. 2 In overall, Yazd province enjoys from sunshine hours in almost 76% of the whole day times and its annually averaged daily HGR and clearness index are 20. 41� MJ/m and 0. 66, respectively. Making comparison between 2 the four nominated locations of Yazd province and 7 other selected cities around the globe, but at the same latitude, except Arizona, revealed that, their monthly mean daily global radiation and clearness index are higher than those of othersix selected cities. Due to the great potential of Yazd province more funds and endeavors for solar energy development have to be devoted.
{"title":"The Potential and Characteristics of Solar Energy in Yazd Province, Iran","authors":"H. Khorasanizadeh, K. Mohammadia, A. Aghaei","doi":"10.5829/IDOSI.IJEE.2014.05.02.09","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.09","url":null,"abstract":"In this study, utilizing the obtaineddata from four distributed locations known asAbarkuh, Behabad, Halvan and Yazd, the solar energy potential and its characteristics in Yazd province of Iran have been evaluated. For the data, daily horizontal global radiation (HGR) and clearness index alsotheir monthly, seasonal and yearly averaged values have been obtained. The results indicate that the four locationsenjoy from 300, 294, 289 and 311 sunny and very sunny days; their yearly averaged daily clearness indexes are 0. 66, 0. 66, 0. 64 and 0. 67 and theiryearly averaged daily global radiations are 20. 74, 20. 78, 19. 52 and 20. 60 MJ/m , respectively. 2 In overall, Yazd province enjoys from sunshine hours in almost 76% of the whole day times and its annually averaged daily HGR and clearness index are 20. 41� MJ/m and 0. 66, respectively. Making comparison between 2 the four nominated locations of Yazd province and 7 other selected cities around the globe, but at the same latitude, except Arizona, revealed that, their monthly mean daily global radiation and clearness index are higher than those of othersix selected cities. Due to the great potential of Yazd province more funds and endeavors for solar energy development have to be devoted.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89260478","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.12
Jelynne P. Tamayo And Ernesto J. Del Rosario
The brown seaweed Sargassum sp. is a promising feedstock for ethanol production because of its relatively high content (41.6% dry basis) of holocellulose. Chemical pretreatment of the seaweed was carried out with 1% (v/v) H SO solution at 5% solid loading for 15 min at 121°C prior to saccharification with 24
褐藻因其相对较高的纤维素含量(干基含量为41.6%)而成为一种很有前途的乙醇生产原料。用1% (v/v) H SO溶液对海藻进行化学预处理，固载率为5%，121℃下预处理15 min，然后用24进行糖化
{"title":"Chemical Analysis and Utilization of Sargassum sp. as Substrate for Ethanol Production","authors":"Jelynne P. Tamayo And Ernesto J. Del Rosario","doi":"10.5829/IDOSI.IJEE.2014.05.02.12","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.12","url":null,"abstract":"The brown seaweed Sargassum sp. is a promising feedstock for ethanol production because of its relatively high content (41.6% dry basis) of holocellulose. Chemical pretreatment of the seaweed was carried out with 1% (v/v) H SO solution at 5% solid loading for 15 min at 121°C prior to saccharification with 24","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"181 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83765026","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.01
G. Ghalekhani, A. Zinatizadeh
Membrane bioreactor (MBR) technology isan integrated combined system ofbiological and membrane processes to treat wastewater. MBR competently removes organic mattersand suspended solids from any type of wastewater. This study is aimed to evaluate and compare the performance of conventional and compartmentalized lab-scale MBR in treating an industrial estate wastewater (Faraman Industrial Estate, Kermanshah, Iran). The MBR systems were operated in two conditions; one in a completely stirred regime(conventional activated sludge (AS) system) and the other one in a semi plug flow regime(compartmentalized activated sludge (CAS) system). Experimental design was performed by response surface methodology (RSM) to assess the effect of two independent numerical factors i.e. hydraulic retention time (HRT) and mixed liquor volatile suspended solids (MLVSS) on nine responses.From the overall results, it was found that CAS-MBR performed better than AS-MBR.The CAS-MBR achieved 94.9% of TCOD removal efficiency at 24 h of HRT and MLVSS concentration of 10000 mg.L. Compared to AS-MBR, CAS-MBR 1
{"title":"Process analysis and optimization of industrial estate wastewater treatment using conventional and compartmentalized membrane bioreactor: A comparative study","authors":"G. Ghalekhani, A. Zinatizadeh","doi":"10.5829/IDOSI.IJEE.2014.05.02.01","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.01","url":null,"abstract":"Membrane bioreactor (MBR) technology isan integrated combined system ofbiological and membrane processes to treat wastewater. MBR competently removes organic mattersand suspended solids from any type of wastewater. This study is aimed to evaluate and compare the performance of conventional and compartmentalized lab-scale MBR in treating an industrial estate wastewater (Faraman Industrial Estate, Kermanshah, Iran). The MBR systems were operated in two conditions; one in a completely stirred regime(conventional activated sludge (AS) system) and the other one in a semi plug flow regime(compartmentalized activated sludge (CAS) system). Experimental design was performed by response surface methodology (RSM) to assess the effect of two independent numerical factors i.e. hydraulic retention time (HRT) and mixed liquor volatile suspended solids (MLVSS) on nine responses.From the overall results, it was found that CAS-MBR performed better than AS-MBR.The CAS-MBR achieved 94.9% of TCOD removal efficiency at 24 h of HRT and MLVSS concentration of 10000 mg.L. Compared to AS-MBR, CAS-MBR 1","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80452370","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.05
S. Mirmohammadi
Commonly, there are varieties of indoor airborne particles in the foundry factories. One of the main particle with emphasize on health effect on exposed human is manganese airborne particle. The current study considered correlation between indoor psychrometric parameters and manganese concentration in the workplace. Overall, fifty samples were collected by filter based on OSHA ID-121method in the workplaces. SPSS V.20 was used to find a predictive model using linear regression model. The mean personal exposure to manganese was 1.626 mg/m . The mean measured psychrometric parameters for dry temperature, relative 3 humidity and air velocity were 29°C, 52% and 1.2m/s, respectively. The correlations between personal exposures and indoor air parameters measurements showed a high significant relationship between personal exposure, dry temperature and wind speed in the factory (P< 0.05). This study concluded that controlling dry temperature and air velocity is the main effective parameters on airborne manganese concentration in the workplaces and decreased the personal exposure.
通常，铸造工厂的室内空气颗粒是多种多样的。空气中锰粒子是对人体健康影响最为突出的主要颗粒物之一。目前的研究考虑了室内湿度参数与工作场所锰浓度之间的相关性。根据OSHA id -121方法，在工作场所用过滤器采集了50份样本。采用SPSS V.20，采用线性回归模型寻找预测模型。人均锰暴露量为1.626 mg/m。干温度、相对湿度和风速的平均测量参数分别为29°C、52%和1.2m/s。个人暴露与室内空气参数测量的相关性显示，个人暴露与工厂内干温度和风速之间存在高度显著的相关关系(P< 0.05)。研究认为，控制干燥温度和风速是控制工作场所空气中锰浓度的主要有效参数，可降低人体暴露量。
{"title":"Predictive Statistical Model for Indoor Manganese Airborne Particles Affected by Psychrometric Parameters","authors":"S. Mirmohammadi","doi":"10.5829/IDOSI.IJEE.2014.05.02.05","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.05","url":null,"abstract":"Commonly, there are varieties of indoor airborne particles in the foundry factories. One of the main particle with emphasize on health effect on exposed human is manganese airborne particle. The current study considered correlation between indoor psychrometric parameters and manganese concentration in the workplace. Overall, fifty samples were collected by filter based on OSHA ID-121method in the workplaces. SPSS V.20 was used to find a predictive model using linear regression model. The mean personal exposure to manganese was 1.626 mg/m . The mean measured psychrometric parameters for dry temperature, relative 3 humidity and air velocity were 29°C, 52% and 1.2m/s, respectively. The correlations between personal exposures and indoor air parameters measurements showed a high significant relationship between personal exposure, dry temperature and wind speed in the factory (P< 0.05). This study concluded that controlling dry temperature and air velocity is the main effective parameters on airborne manganese concentration in the workplaces and decreased the personal exposure.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82139370","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}
Pub Date : 2014-04-01DOI: 10.5829/IDOSI.IJEE.2014.05.02.08
O. A. Oyelaran, Bukola Olalekan Bolaji, Waheed, M. Adekunle
This study has revealed that groundnut shell can be compacted to a stabled state with binding material. The densification of the groundnut shells aid in transporting and storing, making it more economically than is possible at unprocessed state. The effects of binder (cassava starch gel) show that the highest lateral and axial expansion was 1.91 and 6% respectively. Maximum density, relax density, relaxation ratio ranges between 411 to 441 kg/m , 201 to 202 kg/m , 2.03 to 2.19, respectively. Other results are durability in the 33 range of 69.89 to 93.52%, while the calorific value ranges between 19.82 to 21.97 MJ/kg. The overall, briquettes performances showed that 20% binder have the most outstanding resultin terms of durability. It was found that the amount of binder used have significant influence on the properties of the briquettes.
{"title":"Effects of Binding Ratios on Some Densification Characteristics of Groundnut Shell Briquettes","authors":"O. A. Oyelaran, Bukola Olalekan Bolaji, Waheed, M. Adekunle","doi":"10.5829/IDOSI.IJEE.2014.05.02.08","DOIUrl":"https://doi.org/10.5829/IDOSI.IJEE.2014.05.02.08","url":null,"abstract":"This study has revealed that groundnut shell can be compacted to a stabled state with binding material. The densification of the groundnut shells aid in transporting and storing, making it more economically than is possible at unprocessed state. The effects of binder (cassava starch gel) show that the highest lateral and axial expansion was 1.91 and 6% respectively. Maximum density, relax density, relaxation ratio ranges between 411 to 441 kg/m , 201 to 202 kg/m , 2.03 to 2.19, respectively. Other results are durability in the 33 range of 69.89 to 93.52%, while the calorific value ranges between 19.82 to 21.97 MJ/kg. The overall, briquettes performances showed that 20% binder have the most outstanding resultin terms of durability. It was found that the amount of binder used have significant influence on the properties of the briquettes.","PeriodicalId":14591,"journal":{"name":"iranica journal of energy and environment","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82104738","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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