Experimental investigation of groundwater contamination by surface sources: Determination of adsorption capacity, diffusion, and sorption potential of selected anions in different soils

2019 ◽  
Vol 29 (2) ◽  
pp. 139-148
Author(s):  
Neelancherry Remya ◽  
Thendiyath Roshni ◽  
Rohit Ranjan Yadav ◽  
Neha Shukla
Keyword(s):  
Experimental Investigation ◽  
Groundwater Contamination ◽  
Adsorption Capacity ◽  
Sorption Potential ◽  
Different Soils

scholarly journals Insight into the Sorption of 5-Fluorouracil and Methotrexate onto Soil–pH, Ionic Strength, and Co-Contaminant Influence

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1674
Author(s):  
Katarzyna Markiewicz ◽  
Anna Białk-Bielińska ◽  
Paulina Łukaszewicz ◽  
Piotr Stepnowski ◽  
Joanna Dołżonek
Keyword(s):  
Ionic Strength ◽  
Anticancer Drugs ◽  
Environmental Fate ◽  
Soil Matrix ◽  
Ecotoxicological Evaluation ◽  
Soil Structures ◽  
Influence Of Ph ◽  
Sorption Potential ◽  
Different Soils

Nowadays anticancer drugs (ADs), like other pharmaceuticals, are recognized as new emerging pollutants, meaning that they are not commonly monitored in the environment; however, they have great potential to enter the environment and cause adverse effects there. The current scientific literature highlights the problem of their presence in the aquatic environment by publishing more and more results on their analytics and ecotoxicological evaluation. In order to properly assess the risk associated with the presence of ADs in the environment, it is also necessary to investigate the processes that are important in understanding the environmental fate of these compounds. However, the state of knowledge on mobility of ADs in the environment is still very limited. Therefore, the main aim of our study was to investigate the sorption potential of two anticancer drugs, 5-fluorouracil (5-FU) and methotrexate (MTX), onto different soils. Special attention was paid to the determination of the influence of pH and ionic strength as well as presence of co-contaminants (cadmium (Cd2+) and another pharmaceutical—metoprolol (MET)) on the sorption of 5-FU and MTX onto soil. The obtained distribution coefficient values (Kd) ranged from 2.52 to 6.36 L·kg−1 and from 6.79 to 12.94 L·kg−1 for 5-FU and MTX, respectively. Investigated compounds may be classified as slightly or low mobile in the soil matrix (depending on soil). 5-FU may be recognized as more mobile in comparison to MET. It was proved that presence of other soil contaminants may strongly influence their mobility in soil structures. The investigated co-contaminant (MET) caused around 25-fold increased sorption of 5-FU, whereas diminished sorption of MTX. Moreover, the influence of environmental conditions such as pH and ionic strength on their sorption has been clearly demonstrated.

scholarly journals Quantitative determination of organic adsorption capacity in the Palaeozoic shales from South China

2021 ◽  
pp. 014459872098303
Author(s):  
Sibo Wang ◽  
Zhiguang Song ◽  
Jia Xia ◽  
Yuan Gao ◽  
YaoPing Wang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Clear Understanding ◽  
Soluble Organic Matter ◽  
Maximum Increase ◽  
Immature Oil ◽  
Methane Sorption ◽  
Oil Shales ◽  
The Impact ◽  
Total Adsorption

In this study, the methane adsorption capacity of kerogen isolated from the Cambrian, Silurian, and Permian shales and the impact of soluble organic matter (SOM) on the adsorption capacity of these shales were investigated. The results reveal that 1) the adsorption capacity of kerogen varies in a broad range, from 14.48 to 23.22 cm3/g for the Cambrian kerogens, from 15.50 to 36.06 cm3/g for the Silurian kerogens, and from 10.71 to 11.15 cm3/g for the Permian kerogens; 2) the kerogen adsorption accounts for 33.67–70.23% of the total adsorption capacity of these Palaeozoic extracted shales, demonstrating that kerogen is the primary adsorbing substance in shales; 3) the adsorption isotherms of kerogen in highly mature Cambrian and Silurian shales are similar to those of Triassic coal, while the isotherms of kerogen in the relatively immature Permian shales are similar to those of the immature oil shales; and 4) the SOM demonstrates a significant impact on the adsorption capacity of shales as the removal of SOM can cause a maximum increase of 34.29% or a decrease of 23.36% in the total adsorption capacity of shales. However, there is no clear understanding of the impact of SOM on the methane sorption of shales.

Experimental Investigation on the Quasi-Ballistic Transport: Part I—Determination of a New Backscattering Coefficient Extraction Methodology

2009 ◽  
Vol 56 (3) ◽  
pp. 408-419 ◽  
Author(s):  
Vincent Barral ◽  
Thierry Poiroux ◽  
JÉrÔme Saint-Martin ◽  
Daniela Munteanu ◽  
Jean-Luc Autran ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Ballistic Transport ◽  
Backscattering Coefficient ◽  
Transport Part

Experimental Investigation of Microcutting Mechanisms in Marble Grinding

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
LJ. Tanovic ◽  
P. Bojanic ◽  
R. Puzovic ◽  
S. Klimenko
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Cutting Force ◽  
Surface Finish ◽  
Normal Component ◽  
Natural Material ◽  
Grinding Process ◽  
Force Component ◽  
Diamond Grain

This paper offers an experimental study of the microcutting mechanisms in marble grinding to aid the optimization of the marble grinding process. The necessity for investigating these mechanisms is dictated by the increased use of marble in many applications and the fact that grinding and polishing processes are the dominant technologies used to meet surface finish requirements in this natural material. The experiments are aimed at the determination of the normal component of the cutting force and of the grain traces in microcutting with a single diamond grain. The investigations carried out make provisions for establishing critical grain penetration and cutting depths and allow the prediction of the normal cutting force component as a function of grain penetration speed and depth.

Determination of Adsorption Capacity of Alum Hydroxide {Al (OH) 3} Gel for Streptococcus equi sub specie equi and Streptococcus dysgalacltae sub species equisimillis

2017 ◽  
Vol 09 (01) ◽  
Author(s):  
Sohail Manzoor ◽  
Sajjad ur Rahman ◽  
Muhammad Ashraf ◽  
Fraz Munir Khan ◽  
Zahid Hussain Syed ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Streptococcus Equi

A selective medium for determining the population of viable conidia of Cochliobolus sativus in soil

1982 ◽  
Vol 33 (2) ◽  
pp. 287 ◽  
Author(s):  
RL Dodman ◽  
JR Reinke
Keyword(s):  
Rose Bengal ◽  
Complete Recovery ◽  
Selective Medium ◽  
Cochliobolus Sativus ◽  
Ecological Studies ◽  
Dilution Plate ◽  
Different Soils

A selective medium containing three antibiotics, three fungicides, and rose Bengal has been developed for the determination of populations of viable conidia of Cochliobolus sativus in soils by the dilution plate procedure. With this medium, complete recovery of added conidia was achieved; the level of recovery was not significantly different (P > 0.05) when conidia were present in two different soils. The medium should be useful for ecological studies of C. sativus.

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