Coating of silica sand with aluminosilicate clay

Jerez, Jorge; Flury, Markus; Shang, Jianying; Deng, Youjun

doi:10.1016/j.jcis.2005.07.017

Cited by 26 publications

(17 citation statements)

References 31 publications

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“…Analyzed the specific surface area and pore size distribution of the sample with an automatic gas absorber, and the adsorbed gas is nitrogen. The specific surface area of the heterogeneous medium is MCQS (0.632 m 2 g −1 )> ICQS (0.617 m 2 g −1 )> KCQS (0.446 m 2 g −1 )> pure QS (0.103 m 2 g −1 ) based on the data displayed by Table 2, the specific surface area of the coated QS is basically an order of magnitude larger than the specific surface area of pure QS, this phenomenon is the same as before of research is similar [30].…”

Section: Physicochemical Properties Of Heterogeneous Mediasupporting

confidence: 69%

Transport of micro/nano biochar in quartz sand modified by three different clay minerals

Liu

Sun

et al. 2021

Environmental Pollutants and Bioavailability

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Biochar has received continuous attention in recent years due to its high specific surface area, rich micropores, and many types of functional groups. In this study, the migration behavior of modified micro-nano biochar (MMNBC) in heterogeneous media under the influence of ionic strength and flow rate was studied by column experiments. The results showed that the mobility of MMNBC could be increased by increasing the flow rate and decreasing IS. The retention of MMNBC in quartz sand coated with clay minerals was higher than that of pure quartz sand, and the difference existed due to the surface properties. The main reason is that the clay mineral coating adds cations on the surface of quartz sand, which generates electrostatic interaction with MMNBC, which promote the adsorption of MMNBC on the medium. This study provides a theoretical basis for effectively controlling the groundwater environment problems caused by the migration of biochar.

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Section: Physicochemical Properties Of Heterogeneous Mediasupporting

confidence: 69%

Transport of micro/nano biochar in quartz sand modified by three different clay minerals

Liu

Sun

et al. 2021

Environmental Pollutants and Bioavailability

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“…This washing procedure was repeated until the suspensions reached pH 6. Finally, the clay minerals were made homoionic and Ca-saturated by washing with 0.5 M CaCl 2 , and dialyzed with deionized water until free from chloride [33,34]. All colloids were stored in concentrated suspensions at room temperature until use.…”

Section: Soil Colloidsmentioning

confidence: 99%

Comparison of different methods to measure contact angles of soil colloids

Shang

Flury

Harsh

et al. 2008

Journal of Colloid and Interface Science

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209

116

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“…Three polypropylene chromatography columns 5.5 cm in length and 1.5 cm in internal diameter (9.7-ml substrate volume) (PD 10; General Electric Healthcare) were prepared, each with a filter at the bottom and at the top to retain the substrate. One column was packed with kaolinite-claycoated silica (donated by Markus Flury, Washington State University [14]), the second was packed with silica sand (Sigma catalogue no. 274739), and the third was an empty control (containing only the two filters).…”

mentioning

confidence: 99%

Adsorption ofMycobacterium aviumsubsp.paratuberculosisto Soil Particles

Dhand

Toribio

Whittington

2009

Appl Environ Microbiol

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Attachment of Mycobacterium avium subsp. paratuberculosis to soil particles could increase their availability to farm animals, as well as influence the transportation of M. avium subsp. paratuberculosis to water sources. To investigate the possibility of such attachment, we passed a known quantity of M. avium subsp. paratuberculosis through chromatography columns packed with clay soil, sandy soil, pure silica, clay-silica mixture, or clay-silica complexes and measured the organisms recovered in the eluent using culture or quantitative PCR. Experiments were repeated using buffer at a range of pH levels with pure silica to investigate the effect of pH on M. avium subsp. paratuberculosis attachment. Linear mixed-model analyses were conducted to compare the proportional recovery of M. avium subsp. paratuberculosis in the eluent between different substrates and pH levels. Of the organisms added to the columns, 83 to 100% were estimated to be retained in the columns after adjustment for those retained in empty control columns. The proportions recovered were significantly different across different substrates, with the retention being significantly greater (P < 0.05) in pure substrates (silica and clay-silica complexes) than in soil substrates (clay soil and sandy soil). However, there were no significant differences in the retention of M. avium subsp. paratuberculosis between silica and clay-silica complexes or between clay soil and sandy soil. The proportion retained decreased with increasing pH in one of the experiments, indicating greater adsorption of M. avium subsp. paratuberculosis to soil particles at an acidic pH (P < 0.05). The results suggest that under experimental conditions M. avium subsp. paratuberculosis adsorbs to a range of soil particles, and this attachment is influenced by soil pH.

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Coating of silica sand with aluminosilicate clay

Cited by 26 publications

References 31 publications

Transport of micro/nano biochar in quartz sand modified by three different clay minerals

Transport of micro/nano biochar in quartz sand modified by three different clay minerals

Comparison of different methods to measure contact angles of soil colloids

Adsorption ofMycobacterium aviumsubsp.paratuberculosisto Soil Particles

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