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Determination of specific LNAPL volumes in soils having a multimodal pore-size distribution
(2019-05-01)
In this paper we present modifications to previously published models for determining the specific volume of non-aqueous phase liquids (LNAPLs) in the subsurface at and near the groundwater table following a spill or leak ...
Behavior of LNAPL in soils with multimodal pore-size distribution
(Ios Press, 2015-01-01)
New models are presented to characterize the behavior of light nonaqueous phase liquids (LNAPL) and determine their specific volume in soils with a multimodal distribution of pores making an adaptation of the information ...
Transformações estruturais em xerogéis de sílica tratados termicamente
(Universidade Estadual Paulista (Unesp), 2005-03-08)
Xerogéis monolíticos de sílica foram preparados pelo processo sol-gel a partir da hidrólise ácida do TEOS sob estimulação ultrasônica. A evolução da estrutura de poros de xerogéis foi estudada isotermicamente pelas técnicas ...
Transformações estruturais em xerogéis de sílica tratados termicamente
(Universidade Estadual Paulista (Unesp), 2005-03-08)
Xerogéis monolíticos de sílica foram preparados pelo processo sol-gel a partir da hidrólise ácida do TEOS sob estimulação ultrasônica. A evolução da estrutura de poros de xerogéis foi estudada isotermicamente pelas técnicas ...
Transformações estruturais em xerogéis de sílica tratados termicamente
(Universidade Estadual Paulista (UNESP), 2014)
Anisotropy of crystallite growth during sintering of SnO2 xerogels
(1996-12-01)
The crytallite and pore-size evolution during isothermal sintering (400 ≤ T ≤ 700°C) of SnO2 xerogels was studied by X-ray line broadening and nitrogen adsorption-desorption isotherms. The experimental results show a strong ...
Anisotropy of crystallite growth during sintering of SnO2 xerogels
(1996-12-01)
The crytallite and pore-size evolution during isothermal sintering (400 ≤ T ≤ 700°C) of SnO2 xerogels was studied by X-ray line broadening and nitrogen adsorption-desorption isotherms. The experimental results show a strong ...
Structural characteristics of gels prepared from sonohydrolysis and conventional hydrolysis of TEOS: an emphasis on the mass fractal as determined from the pore size distribution
(Wiley-Blackwell, 2005-11-01)
Silica gels were preparated from fixed proportion mixtures of tetraethoxysilane, water and hydrocloric acid, using either ultrasound stimulation (US) or conventional method (CO) in the hydrolysis step of the process. Wet ...
Structural characteristics of gels prepared from sonohydrolysis and conventional hydrolysis of TEOS: an emphasis on the mass fractal as determined from the pore size distribution
(Wiley-Blackwell, 2005-11-01)
Silica gels were preparated from fixed proportion mixtures of tetraethoxysilane, water and hydrocloric acid, using either ultrasound stimulation (US) or conventional method (CO) in the hydrolysis step of the process. Wet ...