Pub Date : 2024-03-01DOI: 10.4103/ijehe.ijehe_51_22
Nadeem Jeddy, L. S. Sai Lakshmi, S. Amutha, T. Radhika, M. Christopher, M. Priya
The number of micronuclei in oral exfoliated buccal mucosal cells of analog (basic) and smart mobile phone users was evaluated and compared. The study population constituted 30 individuals using basic and smartphones within the age group of 45–55 years. They were divided into two groups: Group 1–15 participants using basic mobile phones and Group 2–15 participants using smart mobile phones. Exfoliated buccal mucosal cells were collected from both right and left buccal mucosa, stained with Papanicolaou stain, and evaluated microscopically for the estimation of micronuclei count. Mean micronuclei count was compared statistically between the study groups and also between the sides of frequent usage and opposite sides within the study groups. There was a significant increase in the mean micronuclei count in Group 2 compared to Group 1 and the comparison of mean micronuclei count between the side of frequent phone usage (right side) and opposite side (left side) also showed significant difference in both Groups 1 and 2. Despite technological advance and high-end features, the use of smartphones causes more genotoxicity compared to basic model or analog phones. Although this technology-dominated era mandates use of such phones as a part of routine lifestyle, it is imperative to adopt safety precautions such as use of headphones while talking, carrying a separate pouch for mobile phones to minimize the genotoxic damage.
{"title":"Genotoxicity in Analog and Smart Mobile Phone Users by Assessing Micronuclei in Oral Exfoliated Cells – A Comparative Study","authors":"Nadeem Jeddy, L. S. Sai Lakshmi, S. Amutha, T. Radhika, M. Christopher, M. Priya","doi":"10.4103/ijehe.ijehe_51_22","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_51_22","url":null,"abstract":"\u0000 \u0000 \u0000 The number of micronuclei in oral exfoliated buccal mucosal cells of analog (basic) and smart mobile phone users was evaluated and compared.\u0000 \u0000 \u0000 \u0000 The study population constituted 30 individuals using basic and smartphones within the age group of 45–55 years. They were divided into two groups: Group 1–15 participants using basic mobile phones and Group 2–15 participants using smart mobile phones. Exfoliated buccal mucosal cells were collected from both right and left buccal mucosa, stained with Papanicolaou stain, and evaluated microscopically for the estimation of micronuclei count. Mean micronuclei count was compared statistically between the study groups and also between the sides of frequent usage and opposite sides within the study groups.\u0000 \u0000 \u0000 \u0000 There was a significant increase in the mean micronuclei count in Group 2 compared to Group 1 and the comparison of mean micronuclei count between the side of frequent phone usage (right side) and opposite side (left side) also showed significant difference in both Groups 1 and 2.\u0000 \u0000 \u0000 \u0000 Despite technological advance and high-end features, the use of smartphones causes more genotoxicity compared to basic model or analog phones. Although this technology-dominated era mandates use of such phones as a part of routine lifestyle, it is imperative to adopt safety precautions such as use of headphones while talking, carrying a separate pouch for mobile phones to minimize the genotoxic damage.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"77 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403175","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 : 2024-03-01DOI: 10.4103/ijehe.ijehe_3_23
Rizki Perdani, Eko Suhartono, I. Syauqiah, Nia Kania, M. Noor
Kidney damage from paraquat is influenced by several factors, including the duration of work, the span of exposure from the pesticide spraying, and the nutritional status of the farmers. This damage can be indicated by the high levels of paraquat and changes of the biochemical status in the urine. The present study aimed to analyze the relationship between the length of work, duration of spraying, and the nutritional status obtained from the measurement of body mass index (BMI) values, with the paraquat levels and biochemical status of the farmer’s urine samples. This study was a cross-sectional study and was conducted in September 2022 in North Landasan Ulin Village, Banjarbaru City, South Kalimantan, Indonesia. The length of work and spraying duration were obtained from the direct interviews, while the BMI values were calculated by dividing the body weight (kg) by the body’s height (m). Analysis of the paraquat levels in the urine was measured using a spectrophotometer, while the urine’s biochemical status was obtained using the dipstick colorimetric method. Statistical analysis used: the relationship between each variable is analyzed using the Spearman rank correlation test. Results from the study show that the length of work, duration of spraying, and BMI were moderately associated with an increase in the urinary paraquat levels (correlation coefficient [Rs] 0.26–0.50) (P < 0.05); although the previous factors did not appear to correlate with any changes in the urine’s biochemical status. In summary, prolonged exposure to the spray in combination with the farmers’ long work hours, and also factoring in the abnormal BMI values, resulted in an increase of paraquat levels in the urine.
{"title":"Determining Kidney Damage Risk Factors Associated with Urine Paraquat Levels and Biochemical Urine Profile of Farmers in Banjarbaru, South Kalimantan, Indonesia","authors":"Rizki Perdani, Eko Suhartono, I. Syauqiah, Nia Kania, M. Noor","doi":"10.4103/ijehe.ijehe_3_23","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_3_23","url":null,"abstract":"\u0000 \u0000 \u0000 Kidney damage from paraquat is influenced by several factors, including the duration of work, the span of exposure from the pesticide spraying, and the nutritional status of the farmers. This damage can be indicated by the high levels of paraquat and changes of the biochemical status in the urine. The present study aimed to analyze the relationship between the length of work, duration of spraying, and the nutritional status obtained from the measurement of body mass index (BMI) values, with the paraquat levels and biochemical status of the farmer’s urine samples.\u0000 \u0000 \u0000 \u0000 This study was a cross-sectional study and was conducted in September 2022 in North Landasan Ulin Village, Banjarbaru City, South Kalimantan, Indonesia. The length of work and spraying duration were obtained from the direct interviews, while the BMI values were calculated by dividing the body weight (kg) by the body’s height (m). Analysis of the paraquat levels in the urine was measured using a spectrophotometer, while the urine’s biochemical status was obtained using the dipstick colorimetric method. Statistical analysis used: the relationship between each variable is analyzed using the Spearman rank correlation test.\u0000 \u0000 \u0000 \u0000 Results from the study show that the length of work, duration of spraying, and BMI were moderately associated with an increase in the urinary paraquat levels (correlation coefficient [Rs] 0.26–0.50) (P < 0.05); although the previous factors did not appear to correlate with any changes in the urine’s biochemical status.\u0000 \u0000 \u0000 \u0000 In summary, prolonged exposure to the spray in combination with the farmers’ long work hours, and also factoring in the abnormal BMI values, resulted in an increase of paraquat levels in the urine.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"43 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399726","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 : 2024-03-01DOI: 10.4103/ijehe.ijehe_33_23
S. Mousavi, Saeid Yazdanirad, S. Zakerian, Ali Karimi
This study aimed to identify and prioritize the main indicators that influence the performance of the permit-to-work (PTW) using hybrid fuzzy Delphi-improve analytic hierarchy process (IAHP) methods. By the fuzzy Delphi method, indicators that affect PTW are classified into seven main groups and 41 subindicators based on experts’ opinions; in the final stage, indicators and subindicators were weighted and prioritized using the IAHP methods. The results of the IAHP method showed that accountability (0.178), preventive measures and risk avoidance (0.165), and training and qualification (0.141) are the most important ingredients also; the results revealed that identification of work-related hazards (0.221), preformation of gas test (0.173), signature of responsible person for safety (0.232), the record of the work steps (0.213), period of permit validity (0.153), and period of training courses (0.351) had most important among the subindicators. The results of this study can be used as a practical guide to plan the implementation of corrective measures for improving the performance of the PTW system and conduct an audit to identify the strengths and weaknesses of the PTW system in process industries.
{"title":"Identifying and Prioritizing the Indicators Influencing the Performance of the Permit-to-work System Using Hybrid Fuzzy Delphi Method - Improve Analytic Hierarchy Process Methods: An Exploratory Cross-sectional Study","authors":"S. Mousavi, Saeid Yazdanirad, S. Zakerian, Ali Karimi","doi":"10.4103/ijehe.ijehe_33_23","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_33_23","url":null,"abstract":"\u0000 \u0000 \u0000 This study aimed to identify and prioritize the main indicators that influence the performance of the permit-to-work (PTW) using hybrid fuzzy Delphi-improve analytic hierarchy process (IAHP) methods.\u0000 \u0000 \u0000 \u0000 By the fuzzy Delphi method, indicators that affect PTW are classified into seven main groups and 41 subindicators based on experts’ opinions; in the final stage, indicators and subindicators were weighted and prioritized using the IAHP methods.\u0000 \u0000 \u0000 \u0000 The results of the IAHP method showed that accountability (0.178), preventive measures and risk avoidance (0.165), and training and qualification (0.141) are the most important ingredients also; the results revealed that identification of work-related hazards (0.221), preformation of gas test (0.173), signature of responsible person for safety (0.232), the record of the work steps (0.213), period of permit validity (0.153), and period of training courses (0.351) had most important among the subindicators.\u0000 \u0000 \u0000 \u0000 The results of this study can be used as a practical guide to plan the implementation of corrective measures for improving the performance of the PTW system and conduct an audit to identify the strengths and weaknesses of the PTW system in process industries.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"93 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405605","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 : 2024-02-01DOI: 10.4103/ijehe.ijehe_1_23
Muhammad Nur, M. Sarong, M. Mudatsir, Marlina Marlina, Muhammad Sayuthi
Residents are concerned about the presence of flies, especially in areas near landfills, so it is important to study the distribution patterns of fly communities and community responses to the presence of flies. This study focuses on two main topics: fly distribution in various zones and people’s perspectives on fly prevention initiatives. Data were collected by dividing the sampling location into four clusters and collecting data three times per day (morning, noon, and afternoon). Flypaper was used to collect the insects, which were then separated based on their morphology. The data were tabulated and analyzed using the Shannon-Wiener equation for the diversity index, and the Morisita index equation for the distribution pattern. The observation was then continued by asking people about the existence of the fly community. Cluster 4 has the strongest dynamics with varying absolute density. The morning has the highest absolute density, with an average of 26.56. The findings of the relative density analysis suggest that Musca domestica has the highest percentage, with an average percentage of 74.36%. Only 45% of respondents took actions to combat the presence of flies. The study’s findings also revealed that 97% of the population had never been socialized about sanitary management and attempts to control fly communities. Community sanitation, the prevalence of trash, and the presence of insects are not successfully regulated. The residential sector of the Gampong Jawa Community, which has the most direct access to the landfill, is at a higher risk of getting affected by hazardous diseases conveyed by flies.
居民对苍蝇的存在感到担忧，尤其是在垃圾填埋场附近地区，因此研究苍蝇群落的分布模式和社区对苍蝇存在的反应非常重要。本研究主要关注两个主题：苍蝇在不同区域的分布情况和人们对苍蝇预防措施的看法。 数据收集方法是将取样地点分为四个群组，每天收集三次数据（上午、中午和下午）。使用捕蝇纸收集昆虫，然后根据昆虫的形态进行分类。采用香农-维纳方程（Shannon-Wiener equation）计算多样性指数，采用莫里西塔指数方程（Morisita index equation）计算分布模式，将数据制成表格并进行分析。然后继续观察，向人们询问苍蝇群落的存在情况。 第 4 组动态最强，绝对密度各不相同。早晨的绝对密度最高，平均为 26.56。相对密度分析结果表明，家蝇的比例最高，平均比例为 74.36%。只有 45% 的受访者采取了应对苍蝇的行动。研究结果还显示，97% 的人从未接受过有关卫生管理和试图控制苍蝇群落的社会教育。 社区卫生、垃圾的普遍存在以及昆虫的存在都没有得到成功治理。Gampong Jawa 社区的居民区最直接接触垃圾填埋场，受苍蝇传播的有害疾病影响的风险较高。
{"title":"Qualitative Analysis of Sanitation Management in Residential Area around Gampong Jawa Landfill in 2021 Based on Fly Distribution Pattern","authors":"Muhammad Nur, M. Sarong, M. Mudatsir, Marlina Marlina, Muhammad Sayuthi","doi":"10.4103/ijehe.ijehe_1_23","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_1_23","url":null,"abstract":"\u0000 \u0000 \u0000 Residents are concerned about the presence of flies, especially in areas near landfills, so it is important to study the distribution patterns of fly communities and community responses to the presence of flies. This study focuses on two main topics: fly distribution in various zones and people’s perspectives on fly prevention initiatives.\u0000 \u0000 \u0000 \u0000 Data were collected by dividing the sampling location into four clusters and collecting data three times per day (morning, noon, and afternoon). Flypaper was used to collect the insects, which were then separated based on their morphology. The data were tabulated and analyzed using the Shannon-Wiener equation for the diversity index, and the Morisita index equation for the distribution pattern. The observation was then continued by asking people about the existence of the fly community.\u0000 \u0000 \u0000 \u0000 Cluster 4 has the strongest dynamics with varying absolute density. The morning has the highest absolute density, with an average of 26.56. The findings of the relative density analysis suggest that Musca domestica has the highest percentage, with an average percentage of 74.36%. Only 45% of respondents took actions to combat the presence of flies. The study’s findings also revealed that 97% of the population had never been socialized about sanitary management and attempts to control fly communities.\u0000 \u0000 \u0000 \u0000 Community sanitation, the prevalence of trash, and the presence of insects are not successfully regulated. The residential sector of the Gampong Jawa Community, which has the most direct access to the landfill, is at a higher risk of getting affected by hazardous diseases conveyed by flies.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"879 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467480","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 : 2024-02-01DOI: 10.4103/ijehe.ijehe_3_22
Neha Shrivastava, Vikas Shrivastava, R. Tomar, Anurag Jyoti
Exploitation of nano-based materials has increased the disposal of nanoparticles into the environment. Toxic nanomaterials pose their adverse effects and severely impact the human and environmental health. The aim of this study was to explore the toxic effects of chemically-synthesized copper oxide nanoparticles (CuO-NPs) on Chlorella vulgaris using an algal growth inhibition assay. Nanoparticles were synthesized using cupric sulfate and sodium hydroxide. Synthesized nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy. C. vulgaris culture was exposed to various concentrations of CuO-NPs at intervals of 3, 6, 12, and 24 h. Growth inhibition assay of algal culture was estimated via the spectroscopic method and cell enumeration was done by Neubauer hemocytometry. The average diameter of CuO-NPs was ~35.85 nm. UV-Vis spectroscopy was used to confirm the configuration of CuO-NPs. Therefore, FTIR results has indicated high purity of synthesized CuO-NPs. Size of the CuO-NPs was determined by XRD. Results showed that growth of C. vulgaris microalgae was notably affected by the exposure of 2 mg/L CuO-NPs concentration exposure for 6 h. The current work showed that CuO-NPs have significant toxic to Chlorella sp. Data analysis showed NPs have broad effects on growth of C. vulgaris and there is a correlation between nanoparticles concentration as well as their toxicity on the microalgae.
{"title":"Toxic Effects of Copper Oxide Nanoparticles on Chlorella vulgaris","authors":"Neha Shrivastava, Vikas Shrivastava, R. Tomar, Anurag Jyoti","doi":"10.4103/ijehe.ijehe_3_22","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_3_22","url":null,"abstract":"\u0000 \u0000 \u0000 Exploitation of nano-based materials has increased the disposal of nanoparticles into the environment. Toxic nanomaterials pose their adverse effects and severely impact the human and environmental health. The aim of this study was to explore the toxic effects of chemically-synthesized copper oxide nanoparticles (CuO-NPs) on Chlorella vulgaris using an algal growth inhibition assay.\u0000 \u0000 \u0000 \u0000 Nanoparticles were synthesized using cupric sulfate and sodium hydroxide. Synthesized nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy. C. vulgaris culture was exposed to various concentrations of CuO-NPs at intervals of 3, 6, 12, and 24 h. Growth inhibition assay of algal culture was estimated via the spectroscopic method and cell enumeration was done by Neubauer hemocytometry.\u0000 \u0000 \u0000 \u0000 The average diameter of CuO-NPs was ~35.85 nm. UV-Vis spectroscopy was used to confirm the configuration of CuO-NPs. Therefore, FTIR results has indicated high purity of synthesized CuO-NPs. Size of the CuO-NPs was determined by XRD. Results showed that growth of C. vulgaris microalgae was notably affected by the exposure of 2 mg/L CuO-NPs concentration exposure for 6 h.\u0000 \u0000 \u0000 \u0000 The current work showed that CuO-NPs have significant toxic to Chlorella sp. Data analysis showed NPs have broad effects on growth of C. vulgaris and there is a correlation between nanoparticles concentration as well as their toxicity on the microalgae.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"20 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468069","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 : 2024-02-01DOI: 10.4103/ijehe.ijehe_36_21
M. Bharath, K. A. Kumar, Syed Ariff
Finding out the water quality of Arkavathi river, a tributary of the Kaveri system and surrounding groundwater is the aim of the present work using the water quality index (WQI) method. WQIs contribute a single number which indicates altogether quality of water at a particular sampling point based on varied water quality parameters. An effort has been ready to invent a WQI using 11 water quality parameters such as pH, temperature, dissolve oxygen, alkalinity, chloride, iron, nitrate, fluoride, total hardness, total dissolved solids, and biochemical oxygen demand measured at five various locations along the Arkavathi river just downstream of wastewater disposal points of Ramanagar town and six groundwater samples surrounding the river basin. Weighted arithmetic WQI technique was used to discover overall WQI. The values of WQI for downstream of wastewater disposal points of Ramanagar town rivers vary from 33.78 to 76.82 and for groundwater vary from 38.6241.77 to 65.95. Based on this, the river quality and groundwater at some of the sampling stations were not suitable for drinking. The quality of water is substandard because mainly in the river samples because of the disposal of untreated sewage and industrial effluent generated from the Ramanagar town is directly without any treatment, improper sanitation condition in the nearby city banks of the river, and also, wastewater discharge from surrounding villages, human activities, urban runoff, and agriculture activities.
{"title":"Water Quality Index of Arkavathi River and Surrounding Groundwater","authors":"M. Bharath, K. A. Kumar, Syed Ariff","doi":"10.4103/ijehe.ijehe_36_21","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_36_21","url":null,"abstract":"\u0000 \u0000 \u0000 Finding out the water quality of Arkavathi river, a tributary of the Kaveri system and surrounding groundwater is the aim of the present work using the water quality index (WQI) method.\u0000 \u0000 \u0000 \u0000 WQIs contribute a single number which indicates altogether quality of water at a particular sampling point based on varied water quality parameters. An effort has been ready to invent a WQI using 11 water quality parameters such as pH, temperature, dissolve oxygen, alkalinity, chloride, iron, nitrate, fluoride, total hardness, total dissolved solids, and biochemical oxygen demand measured at five various locations along the Arkavathi river just downstream of wastewater disposal points of Ramanagar town and six groundwater samples surrounding the river basin. Weighted arithmetic WQI technique was used to discover overall WQI.\u0000 \u0000 \u0000 \u0000 The values of WQI for downstream of wastewater disposal points of Ramanagar town rivers vary from 33.78 to 76.82 and for groundwater vary from 38.6241.77 to 65.95. Based on this, the river quality and groundwater at some of the sampling stations were not suitable for drinking.\u0000 \u0000 \u0000 \u0000 The quality of water is substandard because mainly in the river samples because of the disposal of untreated sewage and industrial effluent generated from the Ramanagar town is directly without any treatment, improper sanitation condition in the nearby city banks of the river, and also, wastewater discharge from surrounding villages, human activities, urban runoff, and agriculture activities.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"37 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464743","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 : 2024-02-01DOI: 10.4103/ijehe.ijehe_31_22
J. S. Mary, P. Hemavathy, S. Kiran
A robust and advanced controller for pH monitoring and control is necessary in industrial processes inorder to treat the effluents to protect the flora and fauna in the environment. Advanced controllers such as fractional controllers could be used for effective control with increased accuracy and reliability. This study includes a comparison of conventional controllers with advanced fractional order controllers to improve the performance of pH control in effluents from the industrial plants. A fractional order predictive proportional integral (FOPPI) controller for effective control of pH was designed and simulated. This controller includes the advantages of a smith predictor for dead time compensation and the robustness of a fractional order controller. The presented method shows an improvement in control performance in terms of rise time (32 s), settling time (140 s), lesser oscillations (2%), and lesser integral of the absolute error of 171. FOPPI provides efficient control of pH in all regions of the titration curve and can be used for the control of pH in industrial waste water.
{"title":"Fractional Order Predictive Proportional Integral Control of pH in Effluents of Industrial Plants","authors":"J. S. Mary, P. Hemavathy, S. Kiran","doi":"10.4103/ijehe.ijehe_31_22","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_31_22","url":null,"abstract":"\u0000 \u0000 \u0000 A robust and advanced controller for pH monitoring and control is necessary in industrial processes inorder to treat the effluents to protect the flora and fauna in the environment. Advanced controllers such as fractional controllers could be used for effective control with increased accuracy and reliability.\u0000 \u0000 \u0000 \u0000 This study includes a comparison of conventional controllers with advanced fractional order controllers to improve the performance of pH control in effluents from the industrial plants.\u0000 \u0000 \u0000 \u0000 A fractional order predictive proportional integral (FOPPI) controller for effective control of pH was designed and simulated. This controller includes the advantages of a smith predictor for dead time compensation and the robustness of a fractional order controller. The presented method shows an improvement in control performance in terms of rise time (32 s), settling time (140 s), lesser oscillations (2%), and lesser integral of the absolute error of 171.\u0000 \u0000 \u0000 \u0000 FOPPI provides efficient control of pH in all regions of the titration curve and can be used for the control of pH in industrial waste water.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"1218 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466898","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 : 2024-02-01DOI: 10.4103/ijehe.ijehe_38_23
Zahra Khajehvarnamkhasti, E. Dabaghi, H. Dehghan, Ehsanollah Habibi
The use of appropriate lighting systems can have a significant impact on improving cognitive performance parameters and reducing workplace accidents. The aim of this study was to examine the relationship between different levels of luminance and color temperature of LED lamps on human error and the work speed of individuals in laboratory conditions. This empirical study was conducted on 12 men and women volunteers. Two LED lamps with two color temperatures of 3000°K and 6000°K were set at angles of 15°, 30°, and 45° and with the same light intensity of 300 lux. Accuracy and work speed parameters were recorded at different time intervals using a target accuracy test. Statistical analysis was performed using SPSS version 26. The mean ± standard deviation age of the participants in this study was 20.9 ± 1.2 years, and 50% (6 individuals) were male. The results showed that human error among people in three different angles of luminance for color temperatures of 6000°K and 3000°K was significant (P < 0.01), and in terms of the work speed, this difference was not significant (P > 0.05). The comparison of error counts and work speed between two color temperatures of 3000°K and 6000°K at all three angles of luminance independently showed a significant difference only in error counts (P < 0.001). The results demonstrated that the angle of luminance and color temperature have an impact on human error, with individuals exhibiting fewer errors at higher color temperatures. The findings of this research can be utilized in industries that involve high cognitive performance-sensitive occupations.
{"title":"Relationship between Different Levels of Luminance and Color Temperature of LED Lamps on Human Error and Work Speed in Laboratory Conditions","authors":"Zahra Khajehvarnamkhasti, E. Dabaghi, H. Dehghan, Ehsanollah Habibi","doi":"10.4103/ijehe.ijehe_38_23","DOIUrl":"https://doi.org/10.4103/ijehe.ijehe_38_23","url":null,"abstract":"\u0000 \u0000 \u0000 The use of appropriate lighting systems can have a significant impact on improving cognitive performance parameters and reducing workplace accidents. The aim of this study was to examine the relationship between different levels of luminance and color temperature of LED lamps on human error and the work speed of individuals in laboratory conditions.\u0000 \u0000 \u0000 \u0000 This empirical study was conducted on 12 men and women volunteers. Two LED lamps with two color temperatures of 3000°K and 6000°K were set at angles of 15°, 30°, and 45° and with the same light intensity of 300 lux. Accuracy and work speed parameters were recorded at different time intervals using a target accuracy test. Statistical analysis was performed using SPSS version 26.\u0000 \u0000 \u0000 \u0000 The mean ± standard deviation age of the participants in this study was 20.9 ± 1.2 years, and 50% (6 individuals) were male. The results showed that human error among people in three different angles of luminance for color temperatures of 6000°K and 3000°K was significant (P < 0.01), and in terms of the work speed, this difference was not significant (P > 0.05). The comparison of error counts and work speed between two color temperatures of 3000°K and 6000°K at all three angles of luminance independently showed a significant difference only in error counts (P < 0.001).\u0000 \u0000 \u0000 \u0000 The results demonstrated that the angle of luminance and color temperature have an impact on human error, with individuals exhibiting fewer errors at higher color temperatures. The findings of this research can be utilized in industries that involve high cognitive performance-sensitive occupations.\u0000","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"979 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467601","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 : 2023-01-01DOI: 10.1504/ijee.2023.10048447
M. Tsambe, Pita Raul Sitoe, H. Massango
{"title":"Assessment of the Management System for Lubricant Oils and Used Lubricant Oils: The case of Mozambique","authors":"M. Tsambe, Pita Raul Sitoe, H. Massango","doi":"10.1504/ijee.2023.10048447","DOIUrl":"https://doi.org/10.1504/ijee.2023.10048447","url":null,"abstract":"","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76167722","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 : 2023-01-01DOI: 10.1504/ijee.2023.10059436
Min Peng, Li Chen
{"title":"Landscape planning and design of an ecological characteristic town and its impact on tourism","authors":"Min Peng, Li Chen","doi":"10.1504/ijee.2023.10059436","DOIUrl":"https://doi.org/10.1504/ijee.2023.10059436","url":null,"abstract":"","PeriodicalId":36322,"journal":{"name":"International Journal of Environmental Health Engineering","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135799946","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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