scholarly journals Pattern and direction of groundwater flow and distribution of physical-chemical properties of groundwater in Randublatung basin

2021 ◽  
Vol 930 (1) ◽  
pp. 012048
Author(s):  
E E Tantama ◽  
M A Kumara ◽  
D P E Putra ◽  
G I Marliyani
Keyword(s):  
Electrical Conductivity ◽  
Groundwater Flow ◽  
Ph Value ◽  
Chemical Properties ◽  
Initial Step ◽  
Groundwater Potential ◽  
Groundwater Temperature ◽  
Alluvial Deposits ◽  
Physical Chemical ◽  
Tds Concentration

Abstract The people in the Randublatung basin (Grobogan, Blora, and Bojonegoro Regencies) using groundwater for daily needs and agriculture activity. As the initial step of basin-based groundwater management, it is necessary to understand the groundwater potential in this area: pattern and direction of groundwater flow and groundwater physical-chemical properties (pH, temperature, total dissolved solids, and electrical conductivity). This research aims to analyze the pattern and directions of groundwater flow, the physical-chemical properties, and the correlation between the two. This research method is field measurement of 45 different spots of dug wells in the Randublatung basin. Our results indicate that the pattern and direction of groundwater flow in the Randublatung basin are heading to Bengawan Solo River and then following the river’s flow. The groundwater physical-chemical properties measured: pH value is 6.8 on average, the temperature is 28.9 °C on average, TDS concentration is 409 mg/L average, and electrical conductivity rate is 843 μS/cm average. There is no significant correlation between groundwater flow with pH value and groundwater temperature. However, groundwater TDS concentration and electrical conductivity rate in the Randublatung basin increase as groundwater flows to the Bengawan Solo River, which is affected by the minerals of aquifer rocks (alluvial deposits).

scholarly journals Physico-chemical properties of Dhepa River in Dinajpur District of Bangladesh

2015 ◽  
Vol 6 (1) ◽  
pp. 59-67
Author(s):  
K Rakiba ◽  
Z Ferdoushi
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Ph Value ◽  
Sampling Site ◽  
Chemical Properties ◽  
Quality Parameters ◽  
P Concentration ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Buffer Condition

Among different water quality parameters dissolved oxygen, transparency, pH, PO4-P and depth varied significantly among the sampling sites. The pH value in the present investigation remained a buffer condition (6.50- 7.90). Dissolved oxygen was ranges from 3.80 to 11.60 mg/l throughout the study periods. PO4-P concentration was observed highest (0.30 mg/l) in sampling site 2. On the basis of physical, chemical aspects sampling site 3 and sampling site 5 (situated in gosaipur and chandandoho) found in better condition in terms of limnological aspects. However, it could be concluded that Dhepa River will play important role in riverine fisheries and for further fisheries management.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22041 J. Environ. Sci. & Natural Resources, 6(1): 59-67 2013

scholarly journals Computational Simulation and Prediction on Electrical Conductivity of Oxide-Based Melts by Big Data Mining

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1059 ◽  
Author(s):  
Ao Huang ◽  
Yanzhu Huo ◽  
Juan Yang ◽  
Guangqiang Li
Keyword(s):  
Data Mining ◽  
Electrical Conductivity ◽  
Big Data ◽  
Molten Slag ◽  
Computational Simulation ◽  
Chemical Properties ◽  
Data Driven ◽  
Gradient Boosting ◽  
Big Data Mining ◽  
Physical Chemical

Electrical conductivity is one of the most basic physical–chemical properties of oxide-based melts and plays an important role in the materials and metallurgical industries. Especially with the metallurgical melt, molten slag, existing research studies related to slag conductivity mainly used traditional experimental measurement approaches. Meanwhile, the idea of data-driven decision making has been widely used in many fields instead of expert experience. Therefore, this study proposed an innovative approach based on big data mining methods to investigate the computational simulation and prediction of electrical conductivity. Specific mechanisms are discussed to explain the findings of our proposed approach. Experimental results show slag conductivity can be predicted through constructing predictive models, and the Gradient Boosting Decision Tree (GBDT) model is the best prediction model with 90% accuracy and more than 88% sensitivity. The robustness result of the GBDT model demonstrates the reliability of prediction outcomes. It is concluded that the conductivity of slag systems is mainly affected by TiO2, FeO, SiO2, and CaO. TiO2 and FeO are positively correlated with conductivity, while SiO2 and CaO have negative correlations with conductivity.

scholarly journals Melon cultivation irrigated with saline waters promote chemical alterations in an acrisol

2020 ◽  
Vol 36 ◽  
Author(s):  
Francisco Aécio Lima Pereira ◽  
Hans Raj Gheyi ◽  
José Francismar De Medeiros ◽  
Nildo Da Silva Dias ◽  
Cleyton dos Santos Fernandes ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Irrigation Water ◽  
High Salinity ◽  
Chemical Properties ◽  
Toad Skin ◽  
Ph Values ◽  
Saturation Extract ◽  
Physical Chemical ◽  
Salinity Levels ◽  
Crop Cycle

The objective of the present study was to evaluate the salinization process and the changes in the chemical properties of an Acrisol cultivated with melon irrigated with water of different saline concentrations. The experiment was carried out in the field conditions using the experimental design of randomized blocks, arranged in split-plot. The plots were composed of salinity levels of irrigation water, expressed in terms of water electrical conductivity (ECw): 0.54; 1.48; 2.02 dS m-1; and the sub-plots for melon cultivars: Sancho and Medellín (Toad Skin), Mandacaru (Yellow), Nectar (Galia) and Sedna (Cantaloupe). Soil samples were collected at the beginning and end of the crop cycle to evaluate the changes in the physical-chemical properties of the soil. The electrical conductivity of saturation extract in the soil profile varied for each cultivar, observing high salinity values in soils with cultivars with lower water demand (Sedna and Nectar). The salinity of the soil was lower than the electrical conductivity of the irrigation water in the treatments with high values of ECw. The soil pH values showed little reaction in relation to the initial values. The exchangeable sodium percentage values were approximate twice the sodium adsorption ratio of the saturation stratum.

scholarly journals CLINICAL AND LABORATORIAL RESEARCH IN PHYSICAL-CHEMICAL CHARACTERISTICS OF NEW TOOTHPASTE WITH HYALURON-TI FORTE COMPLEX

2021 ◽  
Vol 16 (4) ◽  
pp. 46-50
Author(s):  
Tat'yana Elovicova ◽  
Elena Ermishina ◽  
Svetlana Ssablina ◽  
Sergey Griroriev ◽  
Anatoly Koshchev
Keyword(s):  
Electrical Conductivity ◽  
Surface Tension ◽  
Calcium Ion ◽  
Ph Value ◽  
Ion Concentration ◽  
Chemical Characteristics ◽  
Optical Parameters ◽  
Physical Chemical ◽  
Before And After ◽  
Mixed Saliva

Subject. Physical-chemical characteristics of the toothpaste Dentaswiss Extra Whitening and structural and optical parameters of mixed saliva before and after volunteer brushing. Objectives. To evaluate physical-chemical characteristics of the new therapeutic and prophylactic toothpaste Dentaswiss Extra Whitening together with changes in structural and optical parameters of the effected mixed saliva. Methodology. The composition and properties of the new therapeutic and prophylactic toothpaste Dentaswiss Extra Whitening are studied based on the results of physical and chemical analysis of three aqueous solutions (prepared with different concentrations) by measuring pH value, calcium ion concentration, electrical conductivity and surface tension. The study involved 32 student volunteers of both sexes (men — 11, women — 21) from the Ural State Medical University Faculty of Dentistry between the ages of 21 to 23 who were comprehensively examined including structural and optical parameters of mixed saliva before and after brushing. Results. The average pH value is 7.91±0.01, the increased calcium ion (Са2+) level is found up to 2.25 mmol/l in all three aqueous suspensions (р≤0.05). Electrical conductivity of suspensions is found to be increased and surface tension is found to be reduced uniformly with the increase in mass fraction (р≤0.05). Conclusion. The study of physical-chemical characteristics of the toothpaste Dentaswiss Extra showed positive changes in pH values, electrical conductivity and surface tension promoting the increased remineralizing properties of mixed saliva (р≤0.05).

scholarly journals Features of the Structure and Physical-Chemical Properties of Poly-Ortho-Toluidine Doped with Toluenesulfonic Acid

2019 ◽  
Vol 20 (1) ◽  
pp. 77-82
Author(s):  
A.L. Stepura ◽  
O.I. Aksimentyeva ◽  
P.Yu. Demchenko
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Specific Resistance ◽  
Oxidative Polymerization ◽  
Chemical Properties ◽  
Conductivity Activation Energy ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Thermal Stability Of

Features of crystal structure, electrical conductivity and thermal stability of poly-ortho-toluidine (PoTi) samples, obtained with method of oxidative polymerization in the environment of sulfuric and toluenesulfonic acids (TSA), were investigated. It was discovered that PoTi-TSA samples are characterized withhigh crystallinity. According to the physico-chemical analysis, doping samples with TSA causes increase of PoTi thermal stability, electrical conductivity and sensor sensitivity on the contrary to samples doped with sulfuric acid. Based on temperature dependence of specific resistance, were calculated the values of the conductivity activation energy, which are within the limits of 0.2-0.4 eV depending on the type of dopant.

scholarly journals Characterization of the existing soil management in relation to some selected physico-chemical properties at Bulehoraworeda, West guji zone

2018 ◽  
Vol 7 (2) ◽  
pp. 43-48 ◽  
Author(s):  
Kenea Worku ◽  
Abdissa Debela ◽  
Diriba Shanko
Keyword(s):  
Electrical Conductivity ◽  
Bulk Density ◽  
Soil Ph ◽  
Ph Value ◽  
Soil Depth ◽  
Subsurface Layer ◽  
Chemical Properties ◽  
Soil Samples ◽  
Surface Horizon ◽  
Physico Chemical

The study of soil physico-chemical properties were made on the soils of BuleHoraWoreda, WestGuji zone. The objective of the study was to characterize soil physical and chemical properties to assess the fertility status of the soils in the study areas. Soil profile pits at representative sites were described and soil samples were collected from each depth of 0-15 cm, 15 – 30 cm, and 30–60 cm depending on the root depth of the crop. Soil samples were collected from two different study areas for the determination of soil texture, bulk density, porosity, soil pH and electrical conductivity. The top layer (0-15 cm) has an average bulk density of 1.10 g/cm3, whereas the subsurface layer (15-30 and the bottom layer (30-60 cm) has an average bulk density of 1.16 g/cm3 and 1.26 g/cm3, respectively at the GuyyeKebele. The average value of bulk density 1.18 g/cm3, 1.29 g/cm3 and 1.39g/cm3 was recorded on the surface horizon (0-15 cm), subsurface horizon (15-30 cm) and the bottom horizon (30 - 60 cm) depth, respectively at BuleHora Farm. Accordingly, the highest (1.39 g/cm3) and the lowest (1.10 g/cm3) average bulk density values were recorded for BuleHoraand GuyyeKebele study Farm, respectively. The average highest porosity (58.48%) value was observed in the surface horizon (0 -15 cm) soil depth and the average lowest porosity value (52.11%) was observed in the bottom horizon (30 – 60 cm) depth at GuyyeKebele study Farm. The average porosity value of the soils in BuleHora study Farm were recorded 55.27%, 52.39% and 47.63% for the surface horizon (0 -15 cm), sub surface horizon ( 15 –30 cm) and bottom horizon (30 – 60 cm) depth , respectively. The soil textural class was changed with depth from sandy clay in surface horizon (0-15 cm) to clay in both sub surface horizon (15- 30 cm) and bottom horizon (30-60 cm) at GuyyeKebele. The pH value was observed on the soils of the GuyyeKebele study area increased from 6.08 at surface horizon (0 – 15 cm) to 6.27 at the sub surface horizon (15- 30 cm) and then slightly decreased to 6.21 at the bottom horizon (30-60 cm) of the soil depth. Lowest soil pH value (5.44) was measured in the surface horizon (0 –15 cm) and the highest pH value (6.09) was observed in bottom horizon (30-60 cm) soil depth at BuleHora farm. The electrical conductivity of the saturated soil paste extracts of the study area was low (ranging from 0.0387 to 0.1587 dS m-1) throughout the profile showing no significant accumulation of soluble salts to convert the soil to saline soil.Int. J. Agril. Res. Innov. & Tech. 7 (2): 43-48, December, 2017

scholarly journals Physical/Chemical Properties and Resorption Behavior of a Newly Developed Ca/P/S-Based Bone Substitute Material

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3458 ◽  
Author(s):  
Bing-Chen Yang ◽  
Jing-Wei Lee ◽  
Chien-Ping Ju ◽  
Jiin-Huey Chern Lin
Keyword(s):  
Cancellous Bone ◽  
Bone Substitute ◽  
Ph Value ◽  
Chemical Properties ◽  
Atomic Ratio ◽  
Bone Substitute Material ◽  
Physical Chemical ◽  
Good Biocompatibility ◽  
Substitute Material ◽  
Hank’S Solution

Properly regulating the resorption rate of a resorbable bone implant has long been a great challenge. This study investigates a series of physical/chemical properties, biocompatibility and the behavior of implant resorption and new bone formation of a newly developed Ca/P/S-based bone substitute material (Ezechbone® Granule CBS-400). Experimental results show that CBS-400 is comprised majorly of HA and CSD, with a Ca/P/S atomic ratio of 54.6/39.2/6.2. After immersion in Hank’s solution for 7 days, the overall morphology, shape and integrity of CBS-400 granules remain similar to that of non-immersed samples without showing apparent collapse or disintegration. With immersion time, the pH value continues to increase to 6.55 after 7 days, and 7.08 after 14 days. Cytotoxicity, intracutaneous reactivity and skin sensitization tests demonstrate the good biocompatibility features of CBS-400. Rabbit implantation/histological observations indicate that the implanted granules are intimately bonded to the surrounding new bone at all times. The implant is not merely a degradable bone substitute, but its resorption and the formation of new cancellous bone proceed at the substantially same pace. After implantation for 12 weeks, about 85% of the implant has been resorbed. The newly-formed cancellous bone ratio quickly increases to >40% at 4 weeks, followed by a bone remodeling process toward normal cancellous bone, wherein the new cancellous bone ratio gradually tapers down to about 30% after 12 weeks.

scholarly journals Synthesis, Characterization, and Metal Adsorption Properties of Formaldehyde-Based Terpolymeric Resins Derived from Anthranilic Acid, Salicylic Acid, and Catechol

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
S. Arasaretnam ◽  
U. P. Dilshani Jayarathna
Keyword(s):  
Salicylic Acid ◽  
Metal Ions ◽  
Anthranilic Acid ◽  
Ph Value ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Time Intervals ◽  
Ion Exchange Capacity ◽  
Ph Variation ◽  
Physical Chemical

Two formaldehyde-based terpolymeric resins (anthranilic acid-catechol-formaldehyde (ACF) and salicylic acid-catechol-formaldehyde (SCF)) have been synthesized by condensing anthranilic acid with catechol and salicylic acid with catechol at 80 ± 5°C using dimethylformamide as a solvent. The resins were characterized by spectral analysis using Fourier-transform infrared (FTIR) spectroscopy. The physical-chemical properties of the resins have been studied. The exchange behavior of various metal ions, namely, Cd2+, Cr3+, Ca2+, and Mg2+, towards the synthesized resins has been studied depending on contact time and pH. Chelating properties of two resins were pH dependent, and with an increase in pH value from 1 to 5, the exchange capacity of metal ions was increased. The increasing rate of ion-exchange capacity was greater in ACF than that in SCF. Cd2+ showed higher rate of exchange at different time intervals in both cases, ACF and SCF. Cr3+ had higher exchange capacity with pH variation in both resins.

scholarly journals An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China

2019 ◽  
Vol 7 (11) ◽  
pp. 394
Author(s):  
Wensi Zhang ◽  
Xiao Wang ◽  
Baolin Liu
Keyword(s):  
Electrical Conductivity ◽  
Sequential Extraction ◽  
Marine Sediments ◽  
Extraction Procedure ◽  
Chemical Properties ◽  
Sequential Extraction Procedure ◽  
Ex Situ ◽  
Bohai Bay ◽  
Physical Chemical ◽  
Adverse Impacts

The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, which were collected from the coastal zone adjacent to Tianjin Port in Bohai Bay. The sequential extraction procedure was applied to identify the mobility of metals and, further, to evaluate the immobilization effect of the amendments. The physical–chemical properties of the sediments, such as the pH, electrical conductivity (EC), salinity, and total organic carbon (TOC), were also measured to better understand their influence on the three metals’ mobility. The results of the sequential extraction procedure indicated that the mobile fractions of the metals were converted into relatively stable fractions because of the two amendments. In addition, the EC, salinity, and TOC decreased moderately, while no obvious variations in the pH of the sediments were observed with the addition of kaolinite and limestone. It was confirmed that both kaolinite and limestone can effectively reduce the mobility and bioavailability of metals, particularly Zn, and limestone generally has a better immobilization effect, compared with kaolinite.

scholarly journals Modeling physical-chemical properties of High Dilutions: an electrical conductivity study

2021 ◽  
Vol 7 (25) ◽  
pp. 165-173
Author(s):  
Carla Holandino ◽  
Rafael Harduim ◽  
Venício Feo da Veiga ◽  
Sheila Garcia ◽  
Carlos Renato Zacharias
Keyword(s):  
Electrical Conductivity ◽  
Mechanical Energy ◽  
Chemical Properties ◽  
Distilled Water ◽  
Physical Chemical ◽  
Palabras Clave ◽  
High Dilutions ◽  
Liquid Preparation ◽  
Inert Solvent ◽  
Electrical Conductivity Study

The most common way to perform succussions is to place a liquid preparation inside a glass vessel and beat it vigorously against a hard elastic surface, either manually or using a mechanical apparatus. This procedure has been assumed able to transfer mechanical energy to the molecular level, where it becomes available to perform chemical work. Such interpretation has been enforced by observed changes in the electrical conductivity (EC) of High Dilutions (HD) due to succussion. In order to address this question, we compared the electrical conductivity changes of HD prepared from Vincristine sulfate (VCR) samples with those of an inert solvent. Samples were produced through manual and mechanical succusions in order to observe the influence of bubbles production. The results confirmed the timing of EC changes but these were equivalent for VCR and solvent, except for VCR 1cH samples. Also, the production of bubbles does not affect the EC in an extent able to distinguish succussion procedures. We concluded that the physical-chemical properties of HD can be modeled by chemical and diffusive mechanisms typical of distilled water. Keywords: Succussion, electrical conductivity, high dilutions, distilled water, modeling.   Modelagem de propriedades físico-químicas das Altas Diluições: o estudo da condutividade elétrica Resumo A maneira mais comum de realizar sucussões é manter uma preparação líquida dentro de um frasco de vidro, e agitá-la violentamente usando um dispositivo mecânico ou batendo-a, manualmente, contra um anteparo rígido, porém elástico. Este procedimento tem sido interpretado como um mecanismo capaz de transferir a energia mecânica da agitação, para níveis moleculares, onde ela se tornaria disponível para a realização de trabalho químico. Tal interpretação tem sido estimulada pela observação de alterações na condutividade elétrica (CE) de Altas Diluições (HD), devido à sucussão. Visando modelar esta questão, comparou-se a alteração da CE de amostras preparadas a partir de Sulfato de Vincristina (VCR) com amostras equivalentes (controle) preparadas apenas com o solvente água destilada. As amostras foram produzidas por sucussão mecânica e manual, a fimd e observar a influéncia da produção de bolhas. Os resultados confirma que a CE varia com o tempo, porém tais variações são equivalentes para VCR e controle, exceto para as amostras VCR 1cH. Também, a produção de bolhas não afeta a CE de forma a permitir usá-la para distinguir os diferentes procedimentos de sucussão. Concluimos que as propriedades físico-químicas da HDs podem ser modeladas por mecanismos químicos e difusivos, típicos para a água destilada. Palavras-chave: Sucussão, condutividade elétrca, altas diluições, água destilada, modelagem.   Modelo de propiedades físico-químicas de las Altas diluciones: un estudio de la conductividad eléctrica Resumen La manera más común para llevar a cabo sucuciones es mantener una preparación líquida dentro de un recipiente de vidrio, agitando violentamente utilizando para esto un aparato mecánico, o golpes manuales contra una superfície dura mas elástica. Este procedimiento ha sido interpretado como un mecanismo capaz de transferir la energía mecánica a nivel molecular, donde es posible realizar el trabajo químico. Tal interpretación ha sido estimulada por los cambios observados en la conductividad eléctrica (CE) de las Altas diluciones (HD), debido al procedimiento de la sucucion. A fin de abordar este punto, se compararon los cambios en la conductividad eléctrica de HD preparadas a partir de Sulfato de Vincristina (VCR) con muestras de solvente inerte. Las muestras fueron producidas a través de sucuciones mecánicas y manuales, con el fin de observar la influencia de la producción de burbujas. Los resultados confirmaron el cambio em la CE, pero estos cambios fueron equivalentes para VCR y solvente, con excepción de las muestras VCR 1cH. Asimismo, la producción de burbujas no afecta la CE en una medida capaz de distinguir las diferentes maneras de sucución. Concluimos que las propiedades físico-químicas de HD pueden ser modeladas por mecanismos químicos y difusivos típicos del agua destilada. Palabras-clave: Sucución, conductividad eléctrica, alta diluciones, agua destilada, modelo.   Correspondence author: Carlos Renato Zacharias, [email protected] How to cite this article: Holandino C, Harduim R, Veiga VF, Garcia, S. Zacharias CR. Modeling physical-chemical properties of High Dilutions: an electrical conductivity study. Int J High Dilution Res [online]. 2008 [cited YYYY Mmm DD]; 7(25): 165-173. Available from: http://journal.giri-society.org/index.php/ijhdr/article/view/319/375.  

Sign in / Sign up

Export Citation Format

Share Document