scholarly journals Simultaneous determination of wettability and shrinkage in an organic residue amended loamy topsoil

2020 ◽  
Vol 68 (2) ◽  
pp. 111-118
Author(s):  
Steffen Beck-Broichsitter ◽  
Saskia Ruth ◽  
Richard Schröder ◽  
Heiner Fleige ◽  
Horst H. Gerke ◽  
...  
Keyword(s):  
Contact Angle ◽  
Sewage Sludge ◽  
Sugar Beet ◽  
Winter Wheat ◽  
Simultaneous Determination ◽  
Agricultural Land ◽  
Contact Angles ◽  
Organic Residues ◽  
Air Capacity

AbstractIn agricultural land use, organic residues such as compost, digestate, and sewage sludge are discussed as costeffective soil conditioner that may improve the water holding capacity and crop available soil moisture. The objective of this study is to determine the effect of application of digestates with different compositions in maize, sugar beet and winter wheat, compost of shrub debris and sewage sludge on shrinkage behaviour and contact angle of till-derived loamy topsoil of a Haplic Luvisol under agricultural use. Novelty is the simultaneous determination of contact angle and shrinkage of soils amended with digestates composed of different composition in maize, sugar beet and winter wheat, compost of shrub debris and sewage sludge. The results suggest that the application of organic residues impacts the air capacity, while the contact angles remained in the subcritical range between > 0° and < 90°. The relationship between CA values and moisture ratios, ϑ, during proportional shrinkage was positive and linear (r2 of 0.98) and negative during residual- and zero-shrinkage (r2 of 0.93).

In-cell clean-up pressurized liquid extraction for the analysis of brominated diphenyl ethers in sewage sludge by GC-NCI-MS

2019 ◽  
Vol 11 (11) ◽  
pp. 1483-1490
Author(s):  
Qian Zhang ◽  
Yuanyuan Liu ◽  
Guilin Han ◽  
Tao Liang ◽  
Chukwunonso Peter Okoli
Keyword(s):  
Sewage Sludge ◽  
Simultaneous Determination ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Brominated Diphenyl Ethers ◽  
Diphenyl Ethers ◽  
Sensitive Method

An automated and sensitive method based on in-cell clean-up pressurized liquid extraction (PLE) was developed and validated for the simultaneous determination of 14 brominated diphenyl ethers in sewage sludge samples.

Simultaneous determination of eighteen perfluorinated compounds in dissolved and particulate phases of wastewater, and in sewage sludge by liquid chromatography-tandem mass spectrometry

2014 ◽  
Vol 6 (5) ◽  
pp. 1341-1349 ◽  
Author(s):  
Olga S. Arvaniti ◽  
Alexandros G. Asimakopoulos ◽  
Marilena E. Dasenaki ◽  
Elpida I. Ventouri ◽  
Athanasios S. Stasinakis ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Sewage Sludge ◽  
Tandem Mass Spectrometry ◽  
Simultaneous Determination ◽  
Perfluorinated Compounds ◽  
Tandem Mass ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Integrated simultaneous determination of 18 perfluorinated compounds in wastewater and sewage sludge.

Development of the extraction method for the simultaneous determination of butyl-, phenyl- and octyltin compounds in sewage sludge

Talanta ◽  
2010 ◽  
Vol 80 (5) ◽  
pp. 1945-1951 ◽  
Author(s):  
Tea Zuliani ◽  
Gaetane Lespes ◽  
Radmila Milačič ◽  
Janez Ščančar
Keyword(s):  
Sewage Sludge ◽  
Simultaneous Determination ◽  
Extraction Method

scholarly journals Some problems of characterization of a solid surface via the surface free energy changes

2017 ◽  
Vol 35 (7-8) ◽  
pp. 647-659 ◽  
Author(s):  
Emil Chibowski
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Experimental Determination ◽  
Surface Free Energy ◽  
Solid Surface ◽  
Contact Angles ◽  
Absolute Value ◽  
Receding Contact

During the processes occurring at a solid surface, the changes in the surface free energy take place. The knowledge about surface free energy is very helpful for understanding the processes taking place on the surface. However, experimental determination of solid surface free energy is still not a fully solved problem. In this paper, some problems dealing with calculation of solid surface free energy from contact angle are discussed based on literature values of advancing and receding contact angles measured on four different fluoropolymers surface. The four approaches most often used for the calculation are described and especial focus on the approach in which both the advancing and receding contact angles is paid. It is concluded that using probing liquids the absolute value of solid surface free energy cannot be determined. However, the determined apparent values of the energy are very helpful to understand the conditions necessary for a given process to occur.

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