Journal of environmental analytical chemistry最新文献_第9页

Optimization and Modeling of Leaching Parameters Affecting Nickel Dissolution from Lateritic Ore in Eskisehir (Mihaliccik-Yunusemre) Using Box-Behnken Experimental Design 基于Box-Behnken试验设计的Eskisehir (Mihaliccik-Yunusemre)红土矿镍溶出浸出参数优化与建模

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/jreac.2020.7.263

T. Agacayak, Mohamed T. Ahmed

{"title":"Optimization and Modeling of Leaching Parameters Affecting Nickel Dissolution from Lateritic Ore in Eskisehir (Mihaliccik-Yunusemre) Using Box-Behnken Experimental Design","authors":"T. Agacayak, Mohamed T. Ahmed","doi":"10.37421/jreac.2020.7.263","DOIUrl":"https://doi.org/10.37421/jreac.2020.7.263","url":null,"abstract":"In this study, optimization and modeling of leaching parameters affecting nickel dissolution from lateritic ore in EskiA…ÂŸehir (MihalA„Â±ccA„Â±k-Yunusemre) were investigated using Box-Behnken design. Stirring speed (100-400 rpm, temperature (40-80°C), acid concentration (0.1-2 M) and dissolution time (30-180 min) were selected as experimental design parameters. 27 experiments were carried out by Box-Behnken experimental design in Minitab 16.0 program. After leaching experiments, the highest Ni dissolution percentages were obtained as 87.85%. The effective parameters and their interactions in nickel dissolution are described with a mathematical model. The results obtained from the experiments were subjected to ANOVA and multiple regression analysis. The R2 value of the model for nickel dissolution was calculated as 0.980. This showed that the predicted values are in good agreement with the observed values. In addition, three-dimensional response surface and contour graphs of the parameters affecting nickel dissolution efficiency were created and the results were examined.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"286 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80274867","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: 3

Effect of Phytoremediation on PAHs Levels of Agricultural Soil around Mechanic Village Wukari, Nigeria 植物修复对尼日利亚乌卡里机械村农业土壤多环芳烃水平的影响

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.265

Itodo Au, R. Shaato, Wuana Ra, E. Yerima

{"title":"Effect of Phytoremediation on PAHs Levels of Agricultural Soil around Mechanic Village Wukari, Nigeria","authors":"Itodo Au, R. Shaato, Wuana Ra, E. Yerima","doi":"10.37421/2380-2391.2020.7.265","DOIUrl":"https://doi.org/10.37421/2380-2391.2020.7.265","url":null,"abstract":"This study evaluates the PAHs composition in agricultural soils around Mechanic village, Wukari using standard procedures by means of GC-MS. The possible source of the PAHs in the soil was deduced, using the diagnostic ratio analysis for PAH origin. Risk assessment was based on the incremental life cancer risk of PAHs proposed by Provisional Guidance for Quantitative Risk Assessment of the United States Environmental Protection Agency. Effect of phyto-remediation using Zea mays inter-planted with Striga hermonthica (SMV-MS), Zea mays alone (SMV-M), Zea mays inter-planted with Striga hermonthica alongside the application of fertilizer (SMV-MSF) and Zea mays alone alongside fertilizer application (SMV-MF). The result reveals that the PAHs composition based on ring prevalence in agricultural soils around Mechanic village Wukari was in the order Σ5 >Σ6 >Σ4 >Σ3 >Σ2 ring. Dibenz [a,h] anthracene 4.52 μg/kg (39.09%) has the highest percentage abundance but was less than the 100 μg/kg and 700 μg/kg Canadian soil quality guideline for agricultural and commercial layout while acenaphthene 0.111 μg/kg (0.90%) was the least abundant. The source of the PAHs in the soil was basically pyrogenic based on the diagnostic ratio analysis while phytoremediation of the soil using Zea mays inter-planted with Striga hermonthica significantly reduce the PAHs content of the soil.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"56 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86874949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Editorial Note on Climate Change 关于气候变化的社论说明

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.284

C. Mounica

引用次数: 0

Editorial Note on Fluid Dynamics of Disease Transmission 疾病传播的流体动力学编者按

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.286

C. Mounica

引用次数: 0

How to Find a Journal’s Aims and Scope for Your Research 如何为你的研究找到期刊的目标和范围

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.268

Mounica Chinthala

引用次数: 0

Occurrence and Remediation of Polychlorinated Biphenyls in Soil from Jos, Plateau State, Nigeria 尼日利亚乔斯高原州土壤中多氯联苯的发生与修复

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.277

E. Ibrahim, Sa John, S. GushitJohn, Dalen Mb, Gube-Ibrahim Ma

{"title":"Occurrence and Remediation of Polychlorinated Biphenyls in Soil from Jos, Plateau State, Nigeria","authors":"E. Ibrahim, Sa John, S. GushitJohn, Dalen Mb, Gube-Ibrahim Ma","doi":"10.37421/2380-2391.2020.7.277","DOIUrl":"https://doi.org/10.37421/2380-2391.2020.7.277","url":null,"abstract":"Investigation into occurrence and Remediation of Polychlorinated biphenyls in soil from Jos, Plateau State Nigeria was carried out. The polychlorinated biphenyls in the soil was extracted with 40ml hexane-acetone mixture (1:1) in ultrasonic bath for 30 minutes and cleaned with column chromatography packed with silica gel. The polychlorinated biphenyls were quantified using Agilent 6975 Gas chromatography Mass Spectrophotometer with the following results: PCB 18 (0.71), PCB 20 (0.37), PCB 28 (0.38), PCB 29 (0.38), PCB 44 (0.42), PCB 52 (0.66), PCB 101 (0.61), PCB 105 (0.17), PCB 137 (0.64), PCB 142 (0.33), PCB 153 (0.42), PCB 170 (0.13) and PCB 180 (0.21) all in mg/kg. Remediation with Moringa seed results in the followings; PCB 20 (0.28), PCB 28 (0.28), PCB 29 (0.28), PCB 52 (0.30), PCB 101 (0.18), PCB 143 (0.91) while the other congeners were completely removed. The Moringa seed powder results completely removed the PCBs sake PCB 44. The effectiveness of the powder as compared with the seed in the removal of the PCBs might be attributed to the increased surface area of the seed powder providing for better interaction with the contaminated soil. Whereas the results from the use of activated carbon only removed PCB 105 completely and reduced the concentrations of other congeners as follows: PCB 18 (0.04), PCB 20 (0.011), PCB 28 (0.019), PCB 29 (0.019), PCB 44 (0.021), PCB 52 (0.33), PCB 101 (0.031), PCB137 (0.032), PCB 142 (0.017), PCB 153 (0.021), PCB 170 (0.007) and PCB 180 (0.011) all in mg/kg. The result suggests that Moringa seed powder could possibly serve as an excellent means of remediation for Polychlorinated biphenyls in contaminated soil.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"77 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88231980","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

Editorial Note on Environmental Pollution 环境污染社论

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.274

C. Mounica

引用次数: 0

Editorial Note on Environmental Organic Chemistry: How Might We Avoid Regrettable Substitution 环境有机化学:我们如何避免令人遗憾的替代

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.275

C. Mounica

引用次数: 0

Source Estimation of Oil Spill Accident in Flood Situation using Gas Chromatography Olfactometry (GC-O) 用气相色谱-嗅觉法估算洪水溢油事故来源

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.5985/jec.30.29

Koga Yuki, Ide Kaito, Matsumoto Misato, Higuchi Taiki, Ichiba Masayoshi, Ueno Daisuke

{"title":"Source Estimation of Oil Spill Accident in Flood Situation using Gas Chromatography Olfactometry (GC-O)","authors":"Koga Yuki, Ide Kaito, Matsumoto Misato, Higuchi Taiki, Ichiba Masayoshi, Ueno Daisuke","doi":"10.5985/jec.30.29","DOIUrl":"https://doi.org/10.5985/jec.30.29","url":null,"abstract":"Oil spill accident from steel mill was caused by flood in August 2019 in Saga Prefecture, Japan. Since “ oil odor prob-lem ” was happened in disaster area, the source estimation of oil odor was conducted using sensory evaluation and Gas Chromatography-Olfactometry (GC-O). By the sensory evaluation, the odor in disaster area was assigned as “ odor of oil and sewage ” . To know in detail of the oil odor, environmental samples (oil absorption sheets) were collected and sensory compared with several fuel oils. As the result of evaluation, oil odor in 7 days after accident consisted of diesel oil (with / or kerosene) instead of spilled oil from steel mill. This result suggested that those fuel oils were also spilled from various sources (heating fuel for house and agriculture) around this disaster are during this flood. On the other hand, the oil absorption sheets in 12 days after accident did not showed odor of those fuel oils, and it showed weak odor of spilled oil from steel mill. It could be due to that these fuel oils spilled were evaporated within a few days under the summer weather, but spilled oil from steel mill which had heavier property was kept in environment.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74627271","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

The Therapeutic Development for COVID-19 COVID-19治疗进展

Journal of environmental analytical chemistry Pub Date : 2020-01-01 DOI: 10.37421/2380-2391.2020.7.272

Shihori Tanabe

引用次数: 2