Pub Date : 2018-11-19DOI: 10.17758/eares4.eap1118454
{"title":"Noise Awareness and Noise Prevention as Strategies for Curtailing the Risk of Noise Induced Hearing Loss Among College Students in Osun State, Nigeria","authors":"","doi":"10.17758/eares4.eap1118454","DOIUrl":"https://doi.org/10.17758/eares4.eap1118454","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79110472","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 : 2018-11-19DOI: 10.17758/eares4.eap1118405
{"title":"Criminalizing Racism: How did Twitter react?","authors":"","doi":"10.17758/eares4.eap1118405","DOIUrl":"https://doi.org/10.17758/eares4.eap1118405","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75362791","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 : 2018-11-19DOI: 10.17758/eares4.eap1118408
{"title":"Effect of Reality Therapy in Reducing Examination Phobia Among Students of Fce(T) Bichi, Kano State","authors":"","doi":"10.17758/eares4.eap1118408","DOIUrl":"https://doi.org/10.17758/eares4.eap1118408","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"40 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89191015","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 : 2018-11-19DOI: 10.17758/eares4.eap1118232
B. Barlow, E. Fosso-Kankeu, K. Nyembwe, F. Waanders, E. Malenga
Chalcopyrite accounts for 70% of all copper bearing minerals and therefore has been studied closely to understand the dissolution kinetics in hope of overcoming the passivation film and increasing the extraction rates of copper. In this study carbonatite samples were obtained from a mining company in South Africa. The carbonatite samples were leached and the leachates were assessed for the metal ions content, pH, electrical conductivity (EC), RedOx potential (RP), acidity, major anions (sulphate, chloride) as well as iron ion concentration for speciation prediction. Speciation of metal ions was conducted through the use of PHREEQC modelling software. The main objective of the study was to determine the kinetic dissolution pattern of the run of mine (ROM) chalcopyrite samples from the carbonatite host rock over time as a varying factor. The mineralogical investigation showed that the ROM sample was dominated by calcite magnesium (Ca0.97 Mg 0.03 (CO3)). The elemental investigation showed that the sample was dominated by Ca and Fe with mass% of 49.81 and 26.31 respectively. The dissolution curve for copper displayed and overall decrease in dissolution rate of copper clearly showing the effects of passivation on the chalcopyrite mineral; a peak dissolution rate (22.8%) was observed after 7 hours of leaching. From the ICP data the major cation in the leachate of the ROM was determined to be Ca, Cu, Fe and Mg. The PHREEQC results showed that Ca, Cu and Mg was dominant as sulphate salt species while Fe was dominant as a free ionic species (Fe). Keywords— Carbonatite ores, Chalcopyrite, kinetic dissolution, pH, passivation, ORP, ROM, XRF, XRD.
{"title":"Prediction of Dissolution of Copper from a Chalcopyrite Carbonatite Ore of South Africa","authors":"B. Barlow, E. Fosso-Kankeu, K. Nyembwe, F. Waanders, E. Malenga","doi":"10.17758/eares4.eap1118232","DOIUrl":"https://doi.org/10.17758/eares4.eap1118232","url":null,"abstract":"Chalcopyrite accounts for 70% of all copper bearing minerals and therefore has been studied closely to understand the dissolution kinetics in hope of overcoming the passivation film and increasing the extraction rates of copper. In this study carbonatite samples were obtained from a mining company in South Africa. The carbonatite samples were leached and the leachates were assessed for the metal ions content, pH, electrical conductivity (EC), RedOx potential (RP), acidity, major anions (sulphate, chloride) as well as iron ion concentration for speciation prediction. Speciation of metal ions was conducted through the use of PHREEQC modelling software. The main objective of the study was to determine the kinetic dissolution pattern of the run of mine (ROM) chalcopyrite samples from the carbonatite host rock over time as a varying factor. The mineralogical investigation showed that the ROM sample was dominated by calcite magnesium (Ca0.97 Mg 0.03 (CO3)). The elemental investigation showed that the sample was dominated by Ca and Fe with mass% of 49.81 and 26.31 respectively. The dissolution curve for copper displayed and overall decrease in dissolution rate of copper clearly showing the effects of passivation on the chalcopyrite mineral; a peak dissolution rate (22.8%) was observed after 7 hours of leaching. From the ICP data the major cation in the leachate of the ROM was determined to be Ca, Cu, Fe and Mg. The PHREEQC results showed that Ca, Cu and Mg was dominant as sulphate salt species while Fe was dominant as a free ionic species (Fe). Keywords— Carbonatite ores, Chalcopyrite, kinetic dissolution, pH, passivation, ORP, ROM, XRF, XRD.","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76561164","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 : 2018-11-19DOI: 10.17758/eares4.eap1118227
E. Fosso-Kankeu, D. Bruyn, Nthambeleni Mukwevho, F. Waanders
{"title":"Photocatalytic Degradation of Naphthalene Using Tin Dioxide Nanomaterial under Visible Light","authors":"E. Fosso-Kankeu, D. Bruyn, Nthambeleni Mukwevho, F. Waanders","doi":"10.17758/eares4.eap1118227","DOIUrl":"https://doi.org/10.17758/eares4.eap1118227","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"386 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76449018","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 : 2018-11-19DOI: 10.17758/eares4.eap1118226
C. Henning, N. T. Leokaoke, J. Bunt, F. Waanders
{"title":"Testing of Briquettes Made from Witbank Coal Fines with Polyvinyl Alcohol as Binder","authors":"C. Henning, N. T. Leokaoke, J. Bunt, F. Waanders","doi":"10.17758/eares4.eap1118226","DOIUrl":"https://doi.org/10.17758/eares4.eap1118226","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77884579","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 : 2018-11-19DOI: 10.17758/eares4.eap1118253
C. Reichel, A. V. D. Merwe, J. Cronje
Abstract—Materials can be classified into three major categories based on the magnetic susceptibility thereof; the property governing the response of the material subjected to a magnetic field. Chromium has many uses in the industry, with stainless steel production being the most important. Chromite ore in South Africa is mainly mined in the Bushveld complex situated in the central western region of the Highveld. Magnetic separation is the physical separation of discrete particles. Wet high-intensity magnetic separation (WHIMS) is commonly used in the gold, uranium, iron and chromite recovery industries. The WHIMS system is based on the imbalance of forces on particles. These forces are magnetic, gravitational, centrifugal, frictional or inertial, and attractive or repulsive forces in favour of the magnetic forces, all due to the production of a magnetic field. During the experimental procedure, single stage separation was used for the aim of this project. Operational parameters such as magnetic intensity (flux), wash water flow rate, feed flow rate and feed density along with particle size are varied. The primary objectives in this study were to obtain experimental data from a laboratory scale WHIMS and to use this data to construct an artificial neural network (ANN) able accurately predict grade, yield and recovery. Sampling and analysis were used to determine the recoveries, grades and yields for the varied operating conditions. The material used during this study is chromite ore. The ANN’s predicted the grade, recovery and yield with high accuracy. The data from experimentation suggest that the WHIMS system recovers best at smaller particle sizes.
{"title":"A Predictive Model for Wet High Intensity Magnetic Separator (WHIMS) using Artificial Neural Networks","authors":"C. Reichel, A. V. D. Merwe, J. Cronje","doi":"10.17758/eares4.eap1118253","DOIUrl":"https://doi.org/10.17758/eares4.eap1118253","url":null,"abstract":"Abstract—Materials can be classified into three major categories based on the magnetic susceptibility thereof; the property governing the response of the material subjected to a magnetic field. Chromium has many uses in the industry, with stainless steel production being the most important. Chromite ore in South Africa is mainly mined in the Bushveld complex situated in the central western region of the Highveld. Magnetic separation is the physical separation of discrete particles. Wet high-intensity magnetic separation (WHIMS) is commonly used in the gold, uranium, iron and chromite recovery industries. The WHIMS system is based on the imbalance of forces on particles. These forces are magnetic, gravitational, centrifugal, frictional or inertial, and attractive or repulsive forces in favour of the magnetic forces, all due to the production of a magnetic field. During the experimental procedure, single stage separation was used for the aim of this project. Operational parameters such as magnetic intensity (flux), wash water flow rate, feed flow rate and feed density along with particle size are varied. The primary objectives in this study were to obtain experimental data from a laboratory scale WHIMS and to use this data to construct an artificial neural network (ANN) able accurately predict grade, yield and recovery. Sampling and analysis were used to determine the recoveries, grades and yields for the varied operating conditions. The material used during this study is chromite ore. The ANN’s predicted the grade, recovery and yield with high accuracy. The data from experimentation suggest that the WHIMS system recovers best at smaller particle sizes.","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"357 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76337820","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 : 2018-11-19DOI: 10.17758/eares4.eap1118119
{"title":"Facile Synthesis of Struvite from Municipal Wastewater Using Pre-Treated Magnesite","authors":"","doi":"10.17758/eares4.eap1118119","DOIUrl":"https://doi.org/10.17758/eares4.eap1118119","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77442624","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 : 2018-11-19DOI: 10.17758/eares4.eap1118238
I. G. Erdogan, E. Fosso-Kankeu, F. Waanders, S. K. Ntwampe, N. Hoth
{"title":"Potentially Toxic Elements Contamination of Soils in O’Kiep, an Arid Region of Namaqualand, South Africa","authors":"I. G. Erdogan, E. Fosso-Kankeu, F. Waanders, S. K. Ntwampe, N. Hoth","doi":"10.17758/eares4.eap1118238","DOIUrl":"https://doi.org/10.17758/eares4.eap1118238","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86503534","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 : 2018-11-19DOI: 10.17758/eares4.eap1118203
{"title":"Mineralogical Study of Pingel-Bauchi Malachite Ore","authors":"","doi":"10.17758/eares4.eap1118203","DOIUrl":"https://doi.org/10.17758/eares4.eap1118203","url":null,"abstract":"","PeriodicalId":8495,"journal":{"name":"ASETH-18,ACABES-18 & EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86694748","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：