scholarly journals Characterization, Classification and Evaluation of Cashew Growing Soils in Coastal Odisha for Sustainable Production

Agropedology ◽  
2019 ◽  
Vol 26 (2) ◽  
Author(s):  
R. Srinivasan ◽  
◽  
S.K. Singh ◽  
D.C. Nayak ◽  
L.G.K. Naidu ◽  
...  
Keyword(s):  
Cation Exchange Capacity ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Group Level ◽  
Soil Series ◽  
Land Capability ◽  
Parent Materials ◽  
Available Nutrients ◽  
Deep Well ◽  
Physico Chemical

Four major soil series (Jharokuali, Kumaradapalli, Ranibara and Kantiagada) representing the cashew growing soils in coastal Odisha, which are developed from different parent materials were studied for their morphological, physico-chemical properties and their suitability for cashew production. Soils are moderately deep to very deep, well drained, texture varied from sand to sandy clay. The soils are slightly acidic to moderately alkaline in nature. A cation exchange capacity is low. Plant available nutrients status of soils are low in N, low to high in available P and K. The DTPA-extractable Fe, Cu and Mn were sufficient. Available Zn is sufficient in surface horizons while deficient in subsoils.The soils at the order level are classified as Alfisols and Entisols at sub group level as Typic Rhodustalfs, Typic Haplustalfs and Typic Ustipsamments. Interpretative groupings for Land Capability, Land Irrigability and Suitability were assessed and identified soil related constraints and suggested appropriate managements measures to improve Cashew productivity.

scholarly journals Physicochemical Parameters and Heavy Metals Content of Soil Samples from Farms in Minna

2015 ◽  
Vol 58 ◽  
pp. 154-163
Author(s):  
Z. Abdulhamid ◽  
E.B. Agbaji ◽  
C.E. Gimba ◽  
A.S. Agbaji
Keyword(s):  
Heavy Metals ◽  
Cation Exchange Capacity ◽  
Physicochemical Parameters ◽  
Chemical Properties ◽  
Absorption Spectrometry ◽  
Exchange Capacity ◽  
Average Concentration ◽  
Soil Samples ◽  
Ph Values ◽  
Physico Chemical

Physico-chemical properties and heavy metals content of soils were determined from seven farms in Minna, central Nigeria. Conventional analytical methods were employed to determine the physico-chemical properties and the heavy metals were analysed by atomic absorption spectrometry. The result showed that pH values ranged from 6.64 - 7.70 indicating slight acidity to slight alkalinity of the soils. The total organic carbon values ranged from 0.95-2.25 % resulting in the presence of organic matter (1.63-3.87). The electrical conductivity values ranged from 17-37 μS/cm. The cation exchange capacity of the soil samples ranged from 3.68-5.15 cmol/kg. The heavy metals levels were in the following range: Cd (0.00018-0.00134 mg/g), Cu (0.0069-0.0476 mg/g), Fe (1.942-2.2059 mg/g), Mn (0.1825-0.3696 mg/g), Ni (0.0065-0.0069 mg/g) and Zn (0.0157-0.2252 mg/g). The concentration of the metals in the soil samples varied according to the following trend: Fe>Mn>Zn> Cu>Ni>Cd. The average concentration of all the metals in each farm also gave the trend Farm B>Farm G>Farm E>Farm C>Farm F>Farm D>Farm A. The findings indicate the presence of heavy metals in all the farms but only Fe was above the FAO/WHO standards.

scholarly journals Physico-chemical Properties of Soil of Rangapani Tea Estate of Bangladesh

2011 ◽  
Vol 3 (3) ◽  
pp. 683-688
Author(s):  
M. N. Islam ◽  
A. F. M. Sanaullah
Keyword(s):  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Chemical Properties ◽  
Clay Content ◽  
Exchange Capacity ◽  
Soil Samples ◽  
Physico Chemical ◽  
Different Depths ◽  
Chemical Properties Of Soils ◽  
Topographic Positions

Bangladesh is one of the tea producing countries of the world. It has 163 tea estates. Rangapani is a low yielding tea estate relative to other neighboring tea estates of Chittagong district in Bangladesh. A total 54 soil samples were collected from six different hills and three topographic positions having different depths of Rnagapanni Tea-Estate. Physico-Chemical properties of soils such as active acidity, reserve acidity, cation exchange capacity and clay content of the collected soil samples were determined. The measured parameters of the soil samples were plotted and analyzed with reference to site and topography. The parameters have been found to vary with sampling sites, depths and topography. Active acidity and reserve acidity were very low, with some exceptions compared to the optimum range for tea cultivation. Sand, silt, clay and cation exchange capacity (CEC) were found in reasonable range Keywords:  Soil; Active acidity; Reserve acidity; Cation exchange capacity; Clay content. © 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: 10.3329/jsr.v3i3.7503               J. Sci. Res. 3 (3), 683-688 (2011)

scholarly journals Effect оf delamination оn physico-chemical properties of kaolin

2021 ◽  
Vol 53 (2) ◽  
pp. 253-266
Author(s):  
Slavica Mihajlovic ◽  
Milica Vlahovic ◽  
Nenad Vusovic ◽  
Natasa Djordjevic ◽  
Marina Jovanovic
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Cation Exchange ◽  
Friction Force ◽  
Layered Structure ◽  
Cation Exchange Capacity ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Physico Chemical ◽  
Plastic Processing

To provide the quality required for its use, raw kaolin must be subjected to certain processing procedures like delamination which is applied to the layered structure materials. The aim of this research is to determine the possibility of performing delamination in the extruder and to estimate the effects of this process on the physico-chemical properties of kaolin. The results showed that delamination can be efficiently realized in the extruder by shearing densely packed layers under the influence of friction force and added Na2CO3 electrolyte. The crystal structure of the system was thus disrupted. This was confirmed by the Hinckley index (HI) decrease and by the dilatometric characteristics changes during heating. The particle size was reduced and, furthermore, new adsorption centers were formed, which led to an increase in the total cation exchange capacity (CEC). The plasticity of kaolin decreased with the increasing delamination degree, as well as the amount of water required for plastic processing, which is favorable in drying ceramic products.

scholarly journals Physicochemical Characterization of Biomass Residue–Derived Biochars in Vietnam

2018 ◽  
Author(s):  
Nguyen Van Hien ◽  
Eugenia Valsami-Jones ◽  
Nguyen Cong Vinh ◽  
Tong Thi Phu ◽  
Nguyen Thi Thanh Tam ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Rice Husk ◽  
Cation Exchange Capacity ◽  
Physicochemical Characterization ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Bet Surface Area ◽  
Sem Images ◽  
Surface Areas ◽  
Physico Chemical

This study compares the physico-chemical characteristics of three different types of biochar produced from biomass residues in Vietnam as a basis for optimising their application in water purification and soil fertilisation.  Wood biochar (WBC), rice husk biochar (RBC), and bamboo biochar (BBC) were produced under limited oxygen conditions using equipment available locally in Vietnam, known as a Top-Lid Updraft Drum (TLUD). The resulting biochars were characterised using a suite of state-of-the-art methods to understand their morphology, surface chemistry and cation exchange capacity.  Surface areas (measured by BET) for WBC and BBC were 479.34 m2/g and 434.53 m2/g, respectively, significantly higher than that of RBC which was only 3.29 m2/g.  The morphology as shown in SEM images corresponds with the BET surface area, showing a smooth surface for RBC, a hollow surface for BBC, and a rough surface for WBC.  All three biochars produced alkaline, with pH values around 10, and all have high carbon contents (47.95 - 82.1 %).  Cation exchange capacity (CEC) was significantly different (p<0.05) among the biochars, being 26.70 cmol/kg for RBC, 20.7 cmol/kg for BBC, and 13.53 cmol/kg for WBC, which relates to the cations (Ca, Mg, K) and functional groups with negative charge (carboxyl, hydroxyl) present on the biochar surfaces.  The highest contents of Ca, Mg and K in rice husk BC may explain its highest CEC values.  Thus, although the biochars were produced by the same method, the various feedstocks lead to quite different physico-chemical properties.  Ongoing work is linking these physico-chemical properties to the biochar efficiencies in terms of nitrate and ammonia capture capacities for use as fertilisers, and for adsorption of heavy metals (Zn, Cu) or water filtration, in order to design optimal biochar properties for specific applications.

The Influence of Physico-Chemical Properties on Heavy Metals Content on the Illegal Land Fill Kadisoka, Sleman, Special Region of Yogyakarta

2019 ◽  
Vol 948 ◽  
pp. 14-19
Author(s):  
Rizqi Amaliyah Fitri ◽  
Suratman Adhitasari ◽  
Suherman
Keyword(s):  
Heavy Metals ◽  
Electrical Conductivity ◽  
Cation Exchange Capacity ◽  
Metal Content ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Physico Chemical ◽  
Three Samples ◽  
Zn Content ◽  
Special Region

The Influence of Physico-chemical properties on heavy metals contenton the Illegal Land Fill at Kadisoka, Sleman, Yogyakarta has been carried out. The aims of this research are to evaluatethe metal concentrationin the soil, analyze the physicochemical properties including water and ash contents, pH, electrical conductivity, total organic carbon, cation exchange capacity; and to find out the maximum heavy metals contentthe soil samples.Soil samples were divided into three samples based on places where they were taken in the landfill area, namely sample I, II and III. Heavy Metals content in the solution were measured by Atomic Absorption Spectrophotometer (AAS).The results showed the highest heavy metal content in soil was Zn. Sample II had the highest Zn value at 1,199 mg kg-1, whereas sample I had the lowest total Zn content of 708.54 mg kg-1.

scholarly journals Status and Speciation of Silicon and Its Interaction with Physico-Chemical Properties

2021 ◽  
pp. 1-11
Author(s):  
Isaiah Ufuoma Efenudu ◽  
Ehi Robert Orhue ◽  
Ogochukwu Jennifer Ikeh ◽  
Michael Aimiesomon Erhayimwen ◽  
Blessing James
Keyword(s):  
Organic Matter ◽  
Acidic Medium ◽  
Soil Depth ◽  
Chemical Properties ◽  
Water Soluble ◽  
Sequential Fractionation ◽  
Soil Redox ◽  
Parent Materials ◽  
Physico Chemical ◽  
Negative Effect

The effectiveness of three different extractants soil mixtures—HCl, HCl + H2S04, and DTPA-TEA, in order to determine Si from soil and the forms of Silicon as influenced by different parent materials under acidic medium. Seven forms of Silicon; namely water soluble, specifically adsorbed, oxides bound, organic matter bound, exchangeable, residual, total viz sequential fractionation. Extractable Si value established in this study was (50.0 mg kg-1), indicating negative effect on plant physiology. The physico-chemical properties decreased significantly with increase in soil depth vs soil parent materials. In addition, the forms of Si in the parent materials decreased in the pattern RES, bound residual fractions > EXC, soluble & exchangeable fractions > OM, organic matter fraction. Among the properties the silt fraction, pH & OM significantly and positively correlated with the forms of silicon, with negative correlation vs clay which maybe due to silicon adsorption by clayey fraction of the soil (redox). Therefore the soil maybe be maintained and conserved for farming activities.

scholarly journals Radiation-induced Grafting of Styrene onto Polyethylene Films for Preparation of Cation Exchange Membranes: Effect of Crosslinking+

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
M. M. Nasef ◽  
H. Saidi ◽  
A. H. Yahaya
Keyword(s):  
Cation Exchange ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Swelling Properties ◽  
Ion Exchange Capacity ◽  
Physico Chemical ◽  
Styrene Divinylbenzene ◽  
Radiation Induced

Crosslinked cation exchange membranes bearing sulfonic acid groups (PE-g-PSSA/DVB) were prepared by radiationinduced grafting of styrene/divinylbenzene (DVB) mixtures onto low density polyethylene (PE) films followed by sulfonation reactions. The effect of addition of DVB (2 and 4%) on the grafting behavior and the physico-chemical properties of the membranes such as ion exchange capacity, swelling and ionic conductivity were evaluated incorrelation with grafting yield (Y%). The structural and thermal properties of the membranes were also studied using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), respectively. Crosslinking with DVB was found to considerably affect the properties of the membranes in a way that reduces the swelling properties and enhances the chemical stability. The ion conductivity of the crosslinked membranes recorded a level of 10–2 S/cm at sufficient grafting yield (28%) despite the reduction caused by the formation of crosslinking structure. The results of this work suggest that membranes prepared in this study are potential alternatives for various electrochemical applications.

scholarly journals Correlations between physico-chemical properties and nickel adsorption parameters in soils used in sanitary landfill liners

2020 ◽  
Vol 34 (3) ◽  
pp. 275-284
Author(s):  
Ricardo Antonio Ferreira da Silva ◽  
Danilo Brito da Costa ◽  
William de Paiva ◽  
Márcio Camargo de Melo ◽  
Veruschka Escarião Dessoles Monteiro
Keyword(s):  
Chemical Properties ◽  
Bentonite Clay ◽  
Exchange Capacity ◽  
Isotherm Models ◽  
Sanitary Landfill ◽  
Adsorption Parameters ◽  
Clayey Sand ◽  
Landfill Liners ◽  
Physico Chemical ◽  
Nickel Adsorption

The adsorption of heavy metals by sanitary landfill liners represents a measure of protection of surface and groundwaters against contamination by metals, mitigating risks to public health. Hence, this research aimed to identify, from correlations, the influence of physico-chemical properties of soils applied in landfill liners using nickel adsorption parameters. Batch equilibrium tests with initial nickel concentrations of 45 to 1440 mg.L-1 were performed in clayey sand and bentonite clay soil, as well as in mixtures. Nickel adsorption parameters from Freundlich and Langmuir isotherm models were obtained, exhibiting a better adjustment in the Freundlich model based on R² and RMSE criteria. Thus, the addition of bentonite clay improved the adsorption to nickel, and the cationic exchange capacity (CEC) was the property that considerably influenced the metal retention in the studied soils.

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