نتایج جستجو برای: sorption process

تعداد نتایج: 1321604  

2017
Valeria M. Nurchi Isabel Villaescusa

Waters, because of human activities, are often characterized by different kinds of contamination. In this chapter we will deal with contamination due to toxic metal ions. To purify wastewaters from these pollutants different treatment processes are applied, which include chemical precipitation, chemical oxidation or reduction, electrochemical treatment, membrane filtration, ion exchange, carbon...

Journal: :Chemical Engineering and Processing 2022

A sorption-enhanced process for hydrogenation of CO2 to methanol was designed and investigated by mathematical modelling techno-economic analysis. The methodology combined dynamic the cyclic reactor operation with pseudo-steady state overall process. With continuous adsorption water in process, highly pure (>99%) produced without downstream distillation. cycle optimized maximize production rate...

Journal: :Journal of environmental sciences 2009
Ruijuan Li Bei Wen Shuzhen Zhang Zhiguo Pei Xiaoquan Shan

The influence of pH on the sorption of pentachlorophenol (PCP) onto three organic amendments, char, humic acid (HA) and peat, and the effect of organic amendments on PCP sorption to three kinds of soils were evaluated. The sorption of PCP on these sorbents fitted the Freundlich model well, suggesting that PCP sorption isotherms were nonlinear with exponential coefficient (N) value lower than 1....

2004
Kai Uwe Totsche

cleanup. Major compounds that have been shown to increase the solubility and thus the mobility of nutrients Mobile organic sorbents (MOS) such as dissolved and colloidal and contaminants are surfactants (Edwards et al., 1991; phase organic matter control flow of water and transport of solutes in soils. We studied the effect of MOS on contaminant fate by systematic Haulbrook et al., 1993; Rahman...

2002
A. P. Gamerdinger

Quantitative laboratory study of pesticide sorption and degradation during transport can provide insight into the basic processes affecting pesticide fate in field soils. Accordingly, we demonstrate the application of analytical solutions of two-site/two-region transport models useful in studying simultaneous pesticide sorption and degradation. Soil-column displacement experiments involving H2O...

2014
TOMAS UNDABEYTIA IRENE GALINDO LEONILA LAIZ

19 Clay-polymer composites were designed for use in filtration processes for disinfection 20 during the course of water purification. The composites were formed by sorption of 21 polymers based on starch modified with quaternary ammonium ethers onto the 22 negatively charged clay mineral bentonite. The performance of the clay-polymer 23 complexes in removal of bacteria was strongly dependent on...

Journal: :Journal of the Chilean Chemical Society 2021

2000
Daniel G. Strawn Donald L. Sparks

make better predictions about the mobility of contaminants, it is critical that time-dependent metal sorption To improve predictions of the toxicity and threat from Pb contamiand desorption behavior on soil be understood, as well nated soil, it is critical that time-dependent sorption and desorption behavior be understood. In this paper, the sorption and desorption as the mechanism of the sorpt...

Journal: :Journal of environmental sciences 2015
Peiya Liu Yujiao Li Qinliang Wen Changxun Dong Genxing Pan

Soil aggregates were prepared from a bulk soil collected from paddy soil in the Taihu Lake region and aluminum (Al) dissolution, solution pH changes during copper (Cu(2+)) sorption were investigated with static sorption and magnetic stirring. Kinetics of Cu(2+) sorption and Al dissolution were also studied by magnetic stirring method. No Al dissolution was observed until Cu(2+) sorption was gre...

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