International journal of environmental science and development最新文献_第5页

Meteorological Factors Correlation with Air Pollutants: A Case Study in Delhi 气象因子与空气污染物的相关性:以德里为例

International journal of environmental science and development Pub Date : 2023-01-01 DOI: 10.18178/ijesd.2023.14.2.1420

M. Malhotra, I. K. Aulakh

引用次数: 0

A Water Quality Assessment and Modelling of the Indian River Tungabhadra 印度通加哈德拉河水质评价与模拟

International journal of environmental science and development Pub Date : 2023-01-01 DOI: 10.18178/ijesd.2023.14.2.1429

M. M. Babu, B. Reddy, A. Shivapur, S Ranjith, P. N. Reddy, B. V. Kavyateja, Kamalesh Kumar

{"title":"A Water Quality Assessment and Modelling of the Indian River Tungabhadra","authors":"M. M. Babu, B. Reddy, A. Shivapur, S Ranjith, P. N. Reddy, B. V. Kavyateja, Kamalesh Kumar","doi":"10.18178/ijesd.2023.14.2.1429","DOIUrl":"https://doi.org/10.18178/ijesd.2023.14.2.1429","url":null,"abstract":"Every river gets polluted as it moves from its source to the end. Hence, the quality of the water requires investigation for the usability. In the present work 40.69 km stretch of the river Tungabhadra in the Davangere district of the Karnataka, India was chosen for testing the water quality. The samples’ physical, chemical and biological characteristics were tested from eight sites for each month during pre-monsoon, monsoon and post-monsoon seasons from 2017 to 2019. A biochemical oxygen demand-dissolved oxygen (BOD-DO) equation was estimated using the de-oxygenation and reaeration constants. The results showed that the physical and chemical parameters were within the limits of the usability standards for all the sampling stations during all seasons. For the first 2.54 km of the River Tungabhadra, the biochemical oxygen demand (BOD) levels were categorized as class “C”, implying the river water to be within drinking water standards. However, from 2.54 to 40.69 km stretch, the river was classified as class “D”, making it unsuitable for drinking water. It was also shown that the river could be maintained class “C” if it flowed at 6m3/s which can be achieved by releasing water from the Tunga and Bhadra reservoirs. Moreover, treatment of the municipal waste before spilling to the river would further reduce the BOD levels.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67453803","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: 0

Treatment of Public Sewage Wastewater Using Electrocoagulation Process 电絮凝法处理公共污水废水

International journal of environmental science and development Pub Date : 2023-01-01 DOI: 10.18178/ijesd.2023.14.2.1423

M. H. Khan, Hira Khalique, S. Shams

{"title":"Treatment of Public Sewage Wastewater Using Electrocoagulation Process","authors":"M. H. Khan, Hira Khalique, S. Shams","doi":"10.18178/ijesd.2023.14.2.1423","DOIUrl":"https://doi.org/10.18178/ijesd.2023.14.2.1423","url":null,"abstract":"Sewage needs to be treated before it is discharged into the water bodies such as rivers and lakes. Sewage wastewater were analyzed in this study, by electrocoagulation process using an alternating power source with current density of 10 A/m2 and 20 A/m2 at treatment time of 10, 20, 40, 60 minutes respectively using copper and zinc electrodes. The effect of electrode material was determined and how chemical oxygen demand (COD), total suspended solids (TSS), Conductivity, pH and turbidity were affected by changing contact time and with changing the current density. We obtained very satisfactory results for the two electrochemical cells such as copper and zinc electrodes. The optimum conditions were determined at treatment time of 20 minutes for a current density of 10 A/m2 with TSS removal efficiency of 92%, COD removal efficiency of 91.5%, pH of 7.50 , with a low turbidity value of 4.27 turbidity (NTU) and the conductivity of 108 μs for copper electrodes. Whereas, using zinc electrodes, the optimum treatment time was 20 minutes at 10 A/m2 current density, TSS removal efficiency was of 92%, COD removal efficiency of 85.7%, pH of 7.80 with turbidity removal efficiency of 87.3 % and the conductivity of 117.3 μs. This electrocoagulation process has attracted a great deal of attention in treating various wastewaters because of its versatility and environmental compatibility.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67454075","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: 0

Extreme and Records Value Analysis for Evaluating Air Quality in Bekaa Valley, Lebanon 黎巴嫩贝卡谷地空气质量极值与记录值分析

International journal of environmental science and development Pub Date : 2023-01-01 DOI: 10.18178/ijesd.2023.14.1.1408

Alya Atoui, S. A. Andaloussi, K. Slim, R. Moilleron, Zaher Khraibani

{"title":"Extreme and Records Value Analysis for Evaluating Air Quality in Bekaa Valley, Lebanon","authors":"Alya Atoui, S. A. Andaloussi, K. Slim, R. Moilleron, Zaher Khraibani","doi":"10.18178/ijesd.2023.14.1.1408","DOIUrl":"https://doi.org/10.18178/ijesd.2023.14.1.1408","url":null,"abstract":"Air pollution is a major public health problem that affects economic development, agriculture, and the ecosystem. Lebanon is one of the most polluted countries in the Middle East region due to the increase in the concentrations of atmospheric air pollution which exceed the required levels according to the global guidelines. The main objective of this paper is to identify the extreme concentrations of air pollutants in order to minimize their adverse effects. The peak of concentration of the pollution which is measured within a specific period could be described by using the extreme value theory mainly as one kind of the three different types of the extreme value theory and the record theory as a second kind. These two approaches will be applied to predict the expected extreme concentration in the future and the probability of occurrence of a new record. Whereas daily measurements of SO2, CO, NO, PM10, PM2.5 throughout the period 2016-2019 in the Bekaa Valley. The findings indicate that the concentrations of the 15, 30, 40, and 50-year return pollutant levels are continuously increasing. The percentage of the change of SO2, CO, NO, PM10, PM2.5 after 50 years is 64%, 5%, 3%, 29%, 20% and 12%, respectively. The records have been observed at the beginning of a time series and an interval point prediction was given for each measure. The future record values of SO2, CO, NO, PM10, PM2.5 were increased by 0.2%, 0.7%, 1%, 0.5%, 6%, and 5.7%, respectively, over 1 year. There was a 66% chance to observe a new record-breaking pollutant level that exceeded the guidelines after two years.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67452892","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: 0

Variation of Surface Water Quality at Bung Binh Thien Reservoir, An Giang Province, Vietnam Using Principal Component Analysis 基于主成分分析的越南安江省奉平天水库地表水水质变化

International journal of environmental science and development Pub Date : 2023-01-01 DOI: 10.18178/ijesd.2023.14.1.1412

N. Giao, Truong Hoang Dan, Huynh Thi Hong Nhien

{"title":"Variation of Surface Water Quality at Bung Binh Thien Reservoir, An Giang Province, Vietnam Using Principal Component Analysis","authors":"N. Giao, Truong Hoang Dan, Huynh Thi Hong Nhien","doi":"10.18178/ijesd.2023.14.1.1412","DOIUrl":"https://doi.org/10.18178/ijesd.2023.14.1.1412","url":null,"abstract":"This study was conducted to assess surface water quality at Bung Binh Thien reservoir, An Giang province, Vietnam. Sixty inhabitants living around the reservoir were interviewed to identify pollution sources. Nine water samples were collected in the dry and rainy seasons and then analyzed for eighteen variables (temperature, pH, electrical conductivity (EC), total dissolved solids (TDS), total suspended solids (TSS), turbidity (Turb), dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), sulfate (SO₄²⁻), chloride (Cl⁻), ammonia (NH4+-N), nitrate (NO3--N), total nitrogen (TN), orthophosphate (PO43--P), total phosphorus (TP), and coliform). Principal component analysis (PCA) was used to identify the primary parameters influencing water quality. The results indicated that the major concerns for water quality in the reservoir were suspended solids, organic matters and fecal microbes. There were significant seasonal variations in water quality. While organic pollution was mainly observed in the dry season, the microbial problem was recorded in the rainy season. This pollution was associated with domestic wastes, agricultural production, livestock, and aquaculture. The PCA results also revealed that DO, BOD, COD, N-NH₄⁺, N-NO₃⁻, P-PO₄³⁻, TP, Cl⁻, and coliform greatly influenced water quality variations, thus requiring these parameters in the monitoring program. The local authority should apply proper measures to improve water quality in the reservoir, and inhabitants should not directly use water for their domestic activities without adequate treatment.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67453493","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: 0

Use of Chitosan for Enhancing the Process of Surface Water Purification in Egypt 壳聚糖在埃及地表水净化过程中的应用

International journal of environmental science and development Pub Date : 2022-01-01 DOI: 10.18178/ijesd.2022.13.2.1368

Rania S. M. A. Hamdon, A. Salem, Hany G. I. Ahmed, Medhat M. H. ElZahar

引用次数: 3

Assessment of Volatile Organic Compounds Removal in Kuwait Wastewater Treatment Plants 科威特污水处理厂去除挥发性有机化合物的评估

International journal of environmental science and development Pub Date : 2022-01-01 DOI: 10.18178/ijesd.2022.13.6.1406

A. Almatouq, M. E. Ahmed, M. Khajah, R. Al-Yaseen

{"title":"Assessment of Volatile Organic Compounds Removal in Kuwait Wastewater Treatment Plants","authors":"A. Almatouq, M. E. Ahmed, M. Khajah, R. Al-Yaseen","doi":"10.18178/ijesd.2022.13.6.1406","DOIUrl":"https://doi.org/10.18178/ijesd.2022.13.6.1406","url":null,"abstract":"This study presents the results of an analysis of the most common Volatile Organic Compounds (VOCs) in wastewater samples from one of the largest wastewater treatment plants in Kuwait. Samples from four different locations (plant influent, aeration tank inlet, aeration tank, and plant effluent) were collected weekly and were analyzed for toluene, benzene, xylene, 1, 3, 5 trimethylbenzene, dichloromethane and chloroform. The results showed that all the selected VOCs were detected except benzene. The average concentrations of VOCs that entered the treatment plant were as follows: chloroform 0.22 ± 0.03 μg/mL, dichloromethane 0.18 ± 0.05 μg/mL, toluene 0.08 ± 0.01 μg/mL, O-Xylene 0.03 μg/mL, M-Xylene 0.01 μg/mL, P-Xylene 0.02 μg/ml, and 1,3,5-trimethylbenzene 0.02 μg/mL. The concentration of VOCs during the treatment processes decreased for all the selected VOCs (treatment efficiency >98%), except chloroform, which has increased. The disinfection process in the treatment plant might have generated byproducts (such as chloroform) which could have increased chloroform concentration. In conclusion, all of the analyzed VOCs in this study were lower than the maximum level of VOCs in treated wastewater.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67452772","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: 0

The Effects of Porous Baffles on the Hydraulic Performance of Sediment Retention Ponds — A Numerical Modelling Study 多孔挡板对蓄水池水力性能的影响——数值模拟研究

International journal of environmental science and development Pub Date : 2022-01-01 DOI: 10.18178/ijesd.2022.13.6.1399

M. Guo, D. Goodarzi, S. Borzooei, J. Pearson, S. Abolfathi

{"title":"The Effects of Porous Baffles on the Hydraulic Performance of Sediment Retention Ponds — A Numerical Modelling Study","authors":"M. Guo, D. Goodarzi, S. Borzooei, J. Pearson, S. Abolfathi","doi":"10.18178/ijesd.2022.13.6.1399","DOIUrl":"https://doi.org/10.18178/ijesd.2022.13.6.1399","url":null,"abstract":"This study develops a numerical model for investigating the hydraulic characteristics of a retention pond with porous baffles. The numerical model is developed using the Reynolds-averaged Navier-Stokes equations (RANS) with k-εturbulence closure model. The model is successfully validated using physical modelling measurements. The proposed model is used to investigate the key mechanisms that govern and influence the hydraulic efficiency of retention ponds with porous baffles. Three configurations with varying numbers and locations of baffles are simulated. The numerical results are analyzed by comparison of velocity fields, tracer transport patterns, and associated residence time distributions (RTDs) across all the simulation scenarios. It was found that the porous baffles effectively improve hydraulic performance by creating uniform flow distribution and dissipating the flow energy, thereby avoiding dead zones and mitigating short-circuiting. Results show that the location of the first baffle plays a critical role in the flow momentum dissipation. Carefully considerations are required to determine the optimal number and positions of baffles in a specific system. The numerical RTDs are in good agreement with the physical modelling data, confirming the positive contribution of porous baffles to the overall hydraulic performance of the pond by extending the average tracer residence time.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67452803","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: 0

Assessment of Naturally Occurring Radionuclides Accumulation in Palm Oil from Soil 土壤中棕榈油中自然发生的放射性核素积累的评估

International journal of environmental science and development Pub Date : 2022-01-01 DOI: 10.18178/ijesd.2022.13.1.1365

O. Olafisoye, O. Oguntibeju, O. Osibote

{"title":"Assessment of Naturally Occurring Radionuclides Accumulation in Palm Oil from Soil","authors":"O. Olafisoye, O. Oguntibeju, O. Osibote","doi":"10.18178/ijesd.2022.13.1.1365","DOIUrl":"https://doi.org/10.18178/ijesd.2022.13.1.1365","url":null,"abstract":"Hyper Pure Germanium (HPGe) radiation detector was used to estimate the activity concentration of fifteen soil and palm oil samples collected from the oil palm plantations in the southwestern, southeastern, and south southern states of Nigeria, and the risk assessments was evaluated. The activity concentrations at a soil depth 0 – 15 cm ranged from 187.4 to 514.4, 2.328 to 6.571, and 1.509 to 6.121 Bq/kg for 40K, 238U, and 232Th, respectively. The activity concentrations at a soil depth 15 – 30 cm ranged from 163.4 to 3188.8, 1.345 to 9.410, and 1.476 to 6.275 Bq/kg for 40K, 238U, and 232Th, respectively. The activity concentrations in the palm oil ranged from 122.3 to 968.0, 1.240 to 6.651, and 1.199 to 8.061 Bq/L for 40K, 238U, and 232Th. For the risk assessments of surface soil samples, the absorbed dose rate (D) ranged from 5.09 to 24.54 nGy/h, while the annual effective dose equivalent (E) ranged from 0.612 × 10-2 to 16.49 × 10-2 mSv/y. The radium equivalent, gamma absorbed dose rate, and the annual effective dose rate in the palm oil samples ranged from 9.981 to 88.00 Bq/L, 4.315 to 46.29 nGy/h, and 0.53 × 10-2 to 56.90 x 10-2 mSv/y, respectively. The activity concentrations reported for soil and palm oil samples were lower than the recommended world average values given by UNSCEAR. Hence, the hazard and risk assessments indicated a low radiation risk within the studied areas.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67450027","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: 0

Research on the Transformation of Oyster Shells into a Green, Recyclable, Low Carbon Emission Building Material 牡蛎壳转化为绿色、可回收、低碳排放建筑材料的研究

International journal of environmental science and development Pub Date : 2022-01-01 DOI: 10.18178/ijesd.2022.13.5.1390

Wen-Cheng Shao, Yu-Wei Dong, Jia-wei Chen, Chaoqun Lu, Yun-Hsuan Lee

{"title":"Research on the Transformation of Oyster Shells into a Green, Recyclable, Low Carbon Emission Building Material","authors":"Wen-Cheng Shao, Yu-Wei Dong, Jia-wei Chen, Chaoqun Lu, Yun-Hsuan Lee","doi":"10.18178/ijesd.2022.13.5.1390","DOIUrl":"https://doi.org/10.18178/ijesd.2022.13.5.1390","url":null,"abstract":"In response to climate change and sustainable environment, the \"circular economy\" that reduces energy development and waste reuse is an important carbon reduction strategy in addition to developing green energy. Based on the circular economy theory of local materials and local use, combines quenched blast furnace slag and geopolymer technology to convert waste oysters into building materials bricks for effective utilization. Our goal is to \"recycle\" oyster shell waste, \"reduce\" carbon emissions from the manufacturing, and achieve \"recycling\". Innovative high-pressure bricks that meet local building material standard. The experiment results show that: 1. The ratios of oyster shell and quenched blast furnace slag were 7:3 and 5:5 respectively, made under the pressure of 110kgf/cm². Curing 28 days later, the compressive strength was 27.5MPa and 38.4MPa, respectively. The bending strength was 3.6MPa and the abrasion test was 1.94mm. 2. Crushing the original high-pressure bricks made of oyster shells, added oyster shell powder and quenched blast furnace slag, remade them in a ratio of 7:3. Curing 7 days later, the compressive strength can reach 41.46 and 51.66MPa.3. Each high-pressure brick made of oyster shells will produce 0.206 to 0.219kg CO₂ emissions, which is 49% to 52% fewer carbon emissions than the 0.422kg CO₂ emitted by each high-pressure concrete brick. 4.The remade oyster shell high-pressure reformed bricks will produce 0.295 to 0.304kg CO₂ emissions, which is 28% to 30% lesser carbon emissions than each high-pressure concrete brick. This result can prove that the oyster shell high-pressure bricks can pass Taiwan’s CNS and Green-building materials standard, comply with the circular economy and achieve the goal of net-zero carbon emissions.","PeriodicalId":13980,"journal":{"name":"International journal of environmental science and development","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67452204","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