Pub Date : 2022-05-05DOI: 10.9734/irjpac/2022/v23i230456
A. Almutairi, T. Al-Bazali
In this study, changes in capillary entry pressure of shale when interacting with CO2, under different temperatures have been investigated. The combined impact of temperature and petrophysical properties of shale (water content, water activity, permeability and porosity) on capillary entry pressure was addressed. Pressure breakthrough measurements were used to evaluate the minimum entry pressure of CO2 through shale. A heavy-duty oven was used to vary the temperature in order to investigate the impact of temperature on CO2 capillary entry pressure through shale. Results showed that capillary entry pressure of shale when interacting with CO2 was highly affected by temperature. Higher temperatures decreased capillary entry pressure of shale. We believe that pore dilation, where pore throat size expands due to the application of heat, may have caused this decrease in capillary entry pressure. However, in some cases higher temperature activated clay swelling that may have caused an apparent decrease in pore throat radii of shale which translated into higher capillary entry pressure. Results also showed that there exists no distinct relationship between petrophysical properties of shale and its measured capillary entry pressure when interacting with CO2 at different temperatures. Heat could alter pore throat radii and cause pore dilation which may alter measured capillary entry pressure. Interfacial tension decreases with increasing temperature and that can be attributed to the weakening of intermolecular forces at the two immiscible fluids interface. Swelling of clay could be related to temperature-induced transition from passive to an active clay.
{"title":"Capillary Pressure Behavior of CO2 - Shale System at Elevated Temperatures","authors":"A. Almutairi, T. Al-Bazali","doi":"10.9734/irjpac/2022/v23i230456","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i230456","url":null,"abstract":"In this study, changes in capillary entry pressure of shale when interacting with CO2, under different temperatures have been investigated. The combined impact of temperature and petrophysical properties of shale (water content, water activity, permeability and porosity) on capillary entry pressure was addressed. Pressure breakthrough measurements were used to evaluate the minimum entry pressure of CO2 through shale. A heavy-duty oven was used to vary the temperature in order to investigate the impact of temperature on CO2 capillary entry pressure through shale. Results showed that capillary entry pressure of shale when interacting with CO2 was highly affected by temperature. Higher temperatures decreased capillary entry pressure of shale. We believe that pore dilation, where pore throat size expands due to the application of heat, may have caused this decrease in capillary entry pressure. However, in some cases higher temperature activated clay swelling that may have caused an apparent decrease in pore throat radii of shale which translated into higher capillary entry pressure. Results also showed that there exists no distinct relationship between petrophysical properties of shale and its measured capillary entry pressure when interacting with CO2 at different temperatures. Heat could alter pore throat radii and cause pore dilation which may alter measured capillary entry pressure. Interfacial tension decreases with increasing temperature and that can be attributed to the weakening of intermolecular forces at the two immiscible fluids interface. Swelling of clay could be related to temperature-induced transition from passive to an active clay.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85308358","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 : 2022-05-03DOI: 10.9734/irjpac/2022/v23i130455
M. Aljohani, Abdullah A. Makki, Adel A. Alqarni, Khalid A. Albalawi, Asim S. Albalawi, M. Alharbi, Hatem A. Al-Aoh, Syed Khalid Mustafa
A lot of Researchers have addressed removing mercury as a pollutant from the wastewaters of several industries. Heavy metals are being removed from wastewater through adsorption on activated carbon, which is becoming additional popular. Although commercial activated carbon is the ideal adsorbent for pollutant elimination, its extensive usage is limited because of its high cost, encouraging researchers to explore alternative effective and low-cost adsorbents. These include activated carbon, polymers, nanoparticles, and low-cost adsorbents. For the remediation of water from mercury, polymers, as well as nanoparticles, which are very effective adsorbents, can be employed. According to a literature review of the most recently published research, polymers and nanoparticles have exhibited exceptional mercury removal capabilities. The present study reviews the different works in which the different adsorbents materials were used to eliminate mercury in the solutions.
{"title":"Adsorbents Used for Removal of Mercury from Aqueous Solutions: A Review","authors":"M. Aljohani, Abdullah A. Makki, Adel A. Alqarni, Khalid A. Albalawi, Asim S. Albalawi, M. Alharbi, Hatem A. Al-Aoh, Syed Khalid Mustafa","doi":"10.9734/irjpac/2022/v23i130455","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i130455","url":null,"abstract":"A lot of Researchers have addressed removing mercury as a pollutant from the wastewaters of several industries. Heavy metals are being removed from wastewater through adsorption on activated carbon, which is becoming additional popular. Although commercial activated carbon is the ideal adsorbent for pollutant elimination, its extensive usage is limited because of its high cost, encouraging researchers to explore alternative effective and low-cost adsorbents. These include activated carbon, polymers, nanoparticles, and low-cost adsorbents. For the remediation of water from mercury, polymers, as well as nanoparticles, which are very effective adsorbents, can be employed. According to a literature review of the most recently published research, polymers and nanoparticles have exhibited exceptional mercury removal capabilities. The present study reviews the different works in which the different adsorbents materials were used to eliminate mercury in the solutions.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80484020","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 : 2022-04-02DOI: 10.9734/irjpac/2022/v23i130448
Cissé M’Bouillé, M. A. Tigori, M. L. Doumbia, P. Niamien, M. Touhami, M. Sfaira
Quantum chemical calculations based on Density Functional Theory (DFT) at the B3LYP/6-31G (d,p) basis set were used to study the inhibition performance of four antifungal organic molecules in copper corrosion in 1M nitric acid solution. The quantum chemical descriptors analysis shows that the investigated compounds have good inhibitory abilities in combating copper corrosion. It results that the inhibition efficiency of these molecules is a function of highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) and the energy gap. The inhibition performance of these molecules increases when the energy gap decreases. Finally, the areas containing N, S and C atoms are the most likely sites to bind to the copper surface either by donating or receiving electrons.
{"title":"Theoretical Evaluation of Some Compounds with Antifungal Effect as Corrosion Inhibitors for Copper in Nitric Acid Solution: DFT Calculations","authors":"Cissé M’Bouillé, M. A. Tigori, M. L. Doumbia, P. Niamien, M. Touhami, M. Sfaira","doi":"10.9734/irjpac/2022/v23i130448","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i130448","url":null,"abstract":"Quantum chemical calculations based on Density Functional Theory (DFT) at the B3LYP/6-31G (d,p) basis set were used to study the inhibition performance of four antifungal organic molecules in copper corrosion in 1M nitric acid solution. The quantum chemical descriptors analysis shows that the investigated compounds have good inhibitory abilities in combating copper corrosion. It results that the inhibition efficiency of these molecules is a function of highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) and the energy gap. The inhibition performance of these molecules increases when the energy gap decreases. Finally, the areas containing N, S and C atoms are the most likely sites to bind to the copper surface either by donating or receiving electrons.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89165909","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 : 2022-01-28DOI: 10.9734/irjpac/2022/v23i130451
Nanou Tiéba Tuo, Georges Stéphane Dembélé, Soro Doh, Fandia Konate, B. Konaté, C. Kodjo, N. Ziao
This reactivity study was performed on seven molecules of a 2,3-dihydro-1H-perimidine series using density functional theory at the B3LYP / 6-311 G (d, p) level. Calculation of the dipole moment showed that compound 4 is more soluble in aqueous medium. The study of frontier molecular orbitals, in particular the energy gap (ΔE), electronegativity (c), chemical hardness (η) and the electrophilic index (ω) has provided a better overview molecular properties. Thus, the compound 5 with the highest energy gap between the boundary orbitals is the most stable and the least reactive. Analysis of local descriptors and the electrostatic potential map identified nitrogen atoms N26 and N28 as the preferred sites of electrophilic attack and the carbon atom C26 as the preferred site of nucleophilic attack.
利用密度泛函理论在B3LYP / 6-311 G (d, p)水平上对2,3-二氢- 1h -嘧啶系列的7个分子进行了反应性研究。偶极矩计算表明，化合物4在水介质中更容易溶解。前沿分子轨道的研究，特别是能隙(ΔE)、电负性(c)、化学硬度(η)和亲电指数(ω)的研究，对分子性质有了较好的概述。因此，边界轨道间能隙最大的化合物5最稳定，反应性最低。局部描述子和静电势图分析表明，氮原子N26和N28是亲电攻击的首选位点，碳原子C26是亲核攻击的首选位点。
{"title":"Theoretical Study of the Chemical Reactivity of a Series of 2, 3-Dihydro-1H-Perimidine","authors":"Nanou Tiéba Tuo, Georges Stéphane Dembélé, Soro Doh, Fandia Konate, B. Konaté, C. Kodjo, N. Ziao","doi":"10.9734/irjpac/2022/v23i130451","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i130451","url":null,"abstract":"This reactivity study was performed on seven molecules of a 2,3-dihydro-1H-perimidine series using density functional theory at the B3LYP / 6-311 G (d, p) level. Calculation of the dipole moment showed that compound 4 is more soluble in aqueous medium. The study of frontier molecular orbitals, in particular the energy gap (ΔE), electronegativity (c), chemical hardness (η) and the electrophilic index (ω) has provided a better overview molecular properties. Thus, the compound 5 with the highest energy gap between the boundary orbitals is the most stable and the least reactive. Analysis of local descriptors and the electrostatic potential map identified nitrogen atoms N26 and N28 as the preferred sites of electrophilic attack and the carbon atom C26 as the preferred site of nucleophilic attack.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"51 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89445305","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 : 2022-01-28DOI: 10.9734/irjpac/2022/v23i130438
F. Sánchez-Viesca, Reina Gómez
The chemistry of a spot test for identification of a bioactive compound is important the more if the substance is strychnine. This converts the test in a toxicological assay with forensic application. The Davy test is based on the oxidation of strychnine by means of potassium ferricyanide in the presence of sulphuric acid. This Theoretical Organic Chemistry study reveals the reaction series that occurs during the test, the electron flow is provided step by step. The process is an electron-transfer oxidation, from the alkaloid to the multi-functional final product having two lactams, a ketone and a carboxylic acid. The involved reactions are electrophilic attack to double bond, hydrogen elimination, free radical subtraction, isomerization, alcohol oxidation, epoxide formation, hydrolysis, concerted reaction mechanism to ketone and aldehyde via carbon-carbon fission, and oxidation of aldehyde to carboxylic acid. All is in accordance with the chemical deportment of the involved compounds and is supported by the references.
{"title":"The Mechanism of the Davy Test for Strychnine","authors":"F. Sánchez-Viesca, Reina Gómez","doi":"10.9734/irjpac/2022/v23i130438","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i130438","url":null,"abstract":"The chemistry of a spot test for identification of a bioactive compound is important the more if the substance is strychnine. This converts the test in a toxicological assay with forensic application. The Davy test is based on the oxidation of strychnine by means of potassium ferricyanide in the presence of sulphuric acid. This Theoretical Organic Chemistry study reveals the reaction series that occurs during the test, the electron flow is provided step by step. The process is an electron-transfer oxidation, from the alkaloid to the multi-functional final product having two lactams, a ketone and a carboxylic acid. The involved reactions are electrophilic attack to double bond, hydrogen elimination, free radical subtraction, isomerization, alcohol oxidation, epoxide formation, hydrolysis, concerted reaction mechanism to ketone and aldehyde via carbon-carbon fission, and oxidation of aldehyde to carboxylic acid. All is in accordance with the chemical deportment of the involved compounds and is supported by the references.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"341 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79526669","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 : 2022-01-22DOI: 10.9734/irjpac/2022/v23i130445
Andy Kofi Agoe, Michael Akrofi Anang, Emmanuel Siaw
The admixture was prepared from Sawdust waste (SDA) and was pyrolysis by placing it in a Nabertherm (SN224350) at a controlled condition. The SDA was characterized using X-ray diffraction technique and applied as an admixture in producing concrete brick with good cementitious properties. Some key factors that contribute to concrete durability such as compacting, curing ages and the essence of quality water were taking into accounts.The sulphate ion concentration in ground water source was determined and its effects on concrete brick with 5 % SDA, 15 % SDA and 25 % SDA replacement were assessed and its compressive strength reported.5% replacements of sawdust ash, concrete brick (no curing) was found to have suffered greater attack at 28 days immersion period as compared to concrete bricks cured for 3 days and 7 days. 3 days curing and no curing of concrete brick showed a greater resistance against Sulphate intrusion with 25% sawdust ash replacements at 28 days immersion period. Premature curing of concrete brick for 7 days, with an increase in sawdust ash replacement were even more vulnerable to sulphate ion attack than concrete brick with 3 days curing and no curing.
{"title":"Determination of Sulphate Ion Concentration in Some Ground Water in the Cape Coast Metropolitan Area, Central Region, Ghana and Its Effects on Concrete Brick with Admixture of Sawdust Ash","authors":"Andy Kofi Agoe, Michael Akrofi Anang, Emmanuel Siaw","doi":"10.9734/irjpac/2022/v23i130445","DOIUrl":"https://doi.org/10.9734/irjpac/2022/v23i130445","url":null,"abstract":"The admixture was prepared from Sawdust waste (SDA) and was pyrolysis by placing it in a Nabertherm (SN224350) at a controlled condition. The SDA was characterized using X-ray diffraction technique and applied as an admixture in producing concrete brick with good cementitious properties. Some key factors that contribute to concrete durability such as compacting, curing ages and the essence of quality water were taking into accounts.The sulphate ion concentration in ground water source was determined and its effects on concrete brick with 5 % SDA, 15 % SDA and 25 % SDA replacement were assessed and its compressive strength reported.5% replacements of sawdust ash, concrete brick (no curing) was found to have suffered greater attack at 28 days immersion period as compared to concrete bricks cured for 3 days and 7 days. 3 days curing and no curing of concrete brick showed a greater resistance against Sulphate intrusion with 25% sawdust ash replacements at 28 days immersion period. Premature curing of concrete brick for 7 days, with an increase in sawdust ash replacement were even more vulnerable to sulphate ion attack than concrete brick with 3 days curing and no curing.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"131 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74579419","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 : 2021-12-30DOI: 10.9734/irjpac/2021/v22i1230453
Suresh D. Ekabote, .. Pruthviraj, U. Divyajyothi, S. Nalina
The pomegranate (Punica granatum L.), is one of the ancient and highly praised favorite fruit belongs family Lythraceae of Myrtales order which is mainly grown in tropical and subtropical regions of the world. In recent years for successful cultivation of pomegranate, faced by many constraints, among them, pest and diseases are the major ones. Common pathogens of pomegranate leaf and fruits include Anthracnose and Cercospora and Alternaria leaf spot and these pathogens cause severe loss to pomegranate crop. Therefore, a field experiment was carried out on the effect of Indofil Z-78 against leaf spots and fruit rot of pomegranate during 2018-19 and 2019-2020 at College of Horticulture, Hiriyur. Experimental results revealed that all the treatments significantly reduced the leaf spots and fruit rot disease severity over untreated control.Amongst all the treatments in both seasons. Indofil Z-78 @ 4 gm/liter was most effective in management leaf spots (15.18 and 12.33 PDI), anthracnose (10.55 and 15.13 PDI) with a yield of 4.00 tons/ha and 3.82 tons/ ha respectively followed by the same fungicides at 3.00 gm/liter.
{"title":"Field Evaluation of Indofil Z-78 against Fruit Rot (Colletotrichum sp.) and Leaf Spot (Alternaria and Cercospora) Disease of Pomegranate","authors":"Suresh D. Ekabote, .. Pruthviraj, U. Divyajyothi, S. Nalina","doi":"10.9734/irjpac/2021/v22i1230453","DOIUrl":"https://doi.org/10.9734/irjpac/2021/v22i1230453","url":null,"abstract":"The pomegranate (Punica granatum L.), is one of the ancient and highly praised favorite fruit belongs family Lythraceae of Myrtales order which is mainly grown in tropical and subtropical regions of the world. In recent years for successful cultivation of pomegranate, faced by many constraints, among them, pest and diseases are the major ones. Common pathogens of pomegranate leaf and fruits include Anthracnose and Cercospora and Alternaria leaf spot and these pathogens cause severe loss to pomegranate crop. Therefore, a field experiment was carried out on the effect of Indofil Z-78 against leaf spots and fruit rot of pomegranate during 2018-19 and 2019-2020 at College of Horticulture, Hiriyur. Experimental results revealed that all the treatments significantly reduced the leaf spots and fruit rot disease severity over untreated control.Amongst all the treatments in both seasons. Indofil Z-78 @ 4 gm/liter was most effective in management leaf spots (15.18 and 12.33 PDI), anthracnose (10.55 and 15.13 PDI) with a yield of 4.00 tons/ha and 3.82 tons/ ha respectively followed by the same fungicides at 3.00 gm/liter.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78991418","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 : 2021-12-30DOI: 10.9734/irjpac/2021/v22i1230454
S. D. Ekabote, P. ., U. Divyajyothi, S. Nalina
The pomegranate (Punica granatum L.), is one of the ancient and highly praised favorite fruit belongs family Lythraceae of Myrtales order which is mainly grown in tropical and subtropical regions of the world. In recent years for the successful cultivation of pomegranate, faced by many constraints, among them, pest and diseases are the major ones. Common pathogens of pomegranate leaf and fruits include Anthracnose and Cercospora and Alternaria leaf spot and these pathogens cause severe loss to pomegranate crop. Therefore, a field experiment was carried out on the effect of Indofil M- 45 against leaf spots and fruit rot of pomegranate during 2018-19 and 2019-2020 at College of Horticulture, Hiriyur. Experimental results revealed that all the treatments significantly reduced the leaf spots and fruit rot disease severity over untreated control. Amongst all the treatments in both seasons. Indofil M-45 atat gm/liter was most effective in management leaf spots (15.50 and 16.17 PDI), anthracnose (10.55 and 8.33 PDI) with a yield of 4.18 tons/ha and 3.59 tons/ ha respectively followed by the same fungicides at 3.00gm/liter.
{"title":"Field Evaluation of Indofil M-45 against Fruit Rot (Colletotrichum sp.) Leaf Spot (Alternaria and Cercospora) Disease of Pomegranate","authors":"S. D. Ekabote, P. ., U. Divyajyothi, S. Nalina","doi":"10.9734/irjpac/2021/v22i1230454","DOIUrl":"https://doi.org/10.9734/irjpac/2021/v22i1230454","url":null,"abstract":"The pomegranate (Punica granatum L.), is one of the ancient and highly praised favorite fruit belongs family Lythraceae of Myrtales order which is mainly grown in tropical and subtropical regions of the world. In recent years for the successful cultivation of pomegranate, faced by many constraints, among them, pest and diseases are the major ones. Common pathogens of pomegranate leaf and fruits include Anthracnose and Cercospora and Alternaria leaf spot and these pathogens cause severe loss to pomegranate crop. Therefore, a field experiment was carried out on the effect of Indofil M- 45 against leaf spots and fruit rot of pomegranate during 2018-19 and 2019-2020 at College of Horticulture, Hiriyur. Experimental results revealed that all the treatments significantly reduced the leaf spots and fruit rot disease severity over untreated control. Amongst all the treatments in both seasons. Indofil M-45 atat gm/liter was most effective in management leaf spots (15.50 and 16.17 PDI), anthracnose (10.55 and 8.33 PDI) with a yield of 4.18 tons/ha and 3.59 tons/ ha respectively followed by the same fungicides at 3.00gm/liter.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"2012 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73604811","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 : 2021-12-30DOI: 10.9734/irjpac/2021/v22i1230449
M. Mehnaoui, M. Hidouri, Khaled Boughzalaa
Water is essential for all living things however its pain has become serious. Many industrial activities cause pollution by the release of polluting byproducts. Wastewater treatment is hence necessary. In this context, the wastewater of the textile industry containing Red Acid 52 was treated by the solid waste of the washed natural phosphate byproduct. Natural phosphate was also studied. The solid materials were first characterized by chemical analysis, Fourier Transform Infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The phosphate materials were after that, tested in the adsorption of the Red Acid 52. The experimental data indicated that the phosphate waste rock allowed the removal of Red Acid 52. Its maximum retention capacity attained 18.4 mg.g-1. Calcinations of materials inhibit the removal capacity found reduced by 60 to 70%. The adsorption kinetics of the Red Acid 52 on the material is well described by the pseudo-second-order model while the adsorption isotherms are identified by the Langmuir model. Hereafter, the thermodynamic study revealed that the adsorption process is spontaneous and exothermic. The obtained results indicated that the adsorbent has the best adsorption capacity of 18.4 mg.g-1. The removal quantity decreases when the adsorbent is calcined. The kinetics model most appropriate is the pseudo-second-order model. As for the adsorption isotherms, they are well described by the Langmuir model. The temperature effect indicates a decrease in the adsorbed amount with the increase of temperature. Furthermore, the adsorption is spontaneous and exothermic and the reaction is physical in nature for both materials.
{"title":"Elimination Study of Anionic Dye by Co-products of the Phosphate Industry: Kinetics and Thermodynamic","authors":"M. Mehnaoui, M. Hidouri, Khaled Boughzalaa","doi":"10.9734/irjpac/2021/v22i1230449","DOIUrl":"https://doi.org/10.9734/irjpac/2021/v22i1230449","url":null,"abstract":"Water is essential for all living things however its pain has become serious. Many industrial activities cause pollution by the release of polluting byproducts. Wastewater treatment is hence necessary. In this context, the wastewater of the textile industry containing Red Acid 52 was treated by the solid waste of the washed natural phosphate byproduct. Natural phosphate was also studied. The solid materials were first characterized by chemical analysis, Fourier Transform Infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The phosphate materials were after that, tested in the adsorption of the Red Acid 52. The experimental data indicated that the phosphate waste rock allowed the removal of Red Acid 52. Its maximum retention capacity attained 18.4 mg.g-1. Calcinations of materials inhibit the removal capacity found reduced by 60 to 70%. The adsorption kinetics of the Red Acid 52 on the material is well described by the pseudo-second-order model while the adsorption isotherms are identified by the Langmuir model. Hereafter, the thermodynamic study revealed that the adsorption process is spontaneous and exothermic. The obtained results indicated that the adsorbent has the best adsorption capacity of 18.4 mg.g-1. The removal quantity decreases when the adsorbent is calcined. The kinetics model most appropriate is the pseudo-second-order model. As for the adsorption isotherms, they are well described by the Langmuir model. The temperature effect indicates a decrease in the adsorbed amount with the increase of temperature. Furthermore, the adsorption is spontaneous and exothermic and the reaction is physical in nature for both materials.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84428958","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 : 2021-12-30DOI: 10.9734/irjpac/2021/v22i1230452
N. Konde, S. Ingle, Nilam Kanase, J. Shirankar, S. Bhoyar, P. Kadu, J. Deshmukh, D. Mali, S. Jadhao
An investigation was carried during the year 2018-19 to study the“ Effect of tillage and weed management practices on physico-chemical properties of soil and yield of soybean in Inceptisols” at Research Farm of All India Coordinated Research Project (AICRP) on Weed Management, Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. The study has focused the integrated effect of tillage and weed management practices on physico chemical properties of soil, yield of soybean and availability of nutrients. Five weed control practices were superimposed in four strips of different tillage practices in strip plot with three replications. The tillage operations consist of conventional tillage, reduced tillage, minimum tillage and zero tillage, however weed management practices includes application of pre emergence weedicide (diclosulam), post emergence weedicides (propaquizafop + imazethapyr.), integration of pre emergence and post emergence weedicide, hand weeding and weedy check. The soils of experimental plot was alkaline in reaction and low to medium in organic carbon. The available nitrogen and phosphorus was low and potassium was high to very high. Based on the observations noted, the bulk density of soil was significantly influenced due to tillage and weed management practices. The highest bulk density was noted with zero tillage (1.46 Mg m-3) followed by reduced tillage (1.45 Mg m-3). The highest Mean Weight Diameter (0.75 mm) was enumerated with minimum tillage and hand weeding management practice (0.75 mm). While, the interaction of tillage and weed management practices showed non-significant results in respect of soil physical properties. The highest available of nitrogen (207.33 kg ha-1), phosphorus (20.07 kg ha-1) and potassium (346.1 kg ha-1) were recorded with minimum tillage and with hand weeding practice.
在2018-19年期间，印度农学系杂草管理协调研究项目(AICRP)研究农场进行了一项调查，研究了“耕作和杂草管理措施对土壤理化性质和ineptisols大豆产量的影响”。研究重点是耕作和杂草管理措施对土壤理化性质、大豆产量和养分有效性的综合影响。在条形地块上，4条不同耕作方式的条带上叠加5种除草措施，重复3次。耕作操作包括常规耕作、少耕、少耕和免耕，但杂草管理措施包括苗期前使用除草剂(双氯磺胺)、苗期后使用除草剂(丙咪唑磷+咪唑乙磷)、苗期前和苗期后综合使用除草剂、手工除草和杂草检查。试验区土壤反应呈碱性，有机碳含量中低。速效氮、磷含量低，速效钾含量高至极高。根据所注意到的观察，由于耕作和杂草管理措施，土壤的容重受到显著影响。免耕时容重最高(1.46 Mg m-3)，其次为免耕(1.45 Mg m-3)。最高平均重径(0.75 mm)为最小耕作和手工除草管理方法(0.75 mm)。而耕作和杂草管理对土壤物理性质的影响不显著。最少耕作和手除草的氮素、磷和钾速效最高，分别为207.33 kg hm -1、20.07 kg hm -1和346.1 kg hm -1。
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