Transport and retention behaviors of titanium dioxide nanoparticles in iron oxide-coated quartz sand: Effects of pH, ionic strength, and humic acid. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2014, 454, 119-127.
Sep 02, 2006· Distinct Roles of Illite Colloid and Humic Acid in Mediating Arsenate Transport in Water-Saturated Sand Columns. Water, Air, & Soil Pollution 2015, 226 (5) DOI: 10.1007/s11270-015-2413-7.
mixtures of a refractory material with an alkali metal silicate and humic acid produce a foundry sand composition for use in making molds and cores which is re-useable upon breaking up, re-milling and re-wetting the used molds which is re-useable upon re-wetting and rmilling dried out sand. a unique foundry sand binder comprising a solid, water-soluble alkali metal silicate and humic acid also ...
Humic acid (HA) is a type of the most common natural organic matters (NOM) that widely found in nature. Generally, the concentration of NOM in groundwater is 0.5 mg C/L, while in surface water it is 20 mg C/L or above. Furthermore, according to Sun et al. (2012), the concentration of NOM was commonly in the range of 0–20 mg C/L.
of humic acid concentrations (HA, 0−10 mg L−1), fractional surface coverage of iron oxyhydroxide coatings on sand grains (λ,0−0.75), and pH (6.0−10.5). HA was found to have a marked effect on the electrokinetic properties of ARS-nHAP, and on the transport …
The presence of humic acid could affect the zeta potential and size of the colloidal silica, which led to obvious colloidal silica aggregation in the divalent ion solution. Humic acid increased colloidal silica transport by formation of non-adsorbing aqueous phase silica–HA complexes.
The adsorptive affinities of divalent metal ions (including Fe2+ and Mn2+) on silica and on humic acid were determined with intrinsic surface complexation constants (Km1(int)) approximated from ...
Jun 23, 2010· Clays are alumina silicates and sand is largely silicon, so how could there be a shortage of silicon? The answer lies in the form of silicon that enters the plant. ... We always recommend the inclusion of small amounts of humic acid and potassium silicate with every irrigation, to manage saline irrigation water. ... Silica intereacts with ...
Sep 10, 2008· The deposition kinetics of fullerene (C60) nanoparticles onto bare silica surfaces and surfaces precoated with humic acid and alginate are investigated over a range of monovalent (NaCl) and divalent (CaCl2) salt concentrations using a quartz crystal microbalance. Because simultaneous aggregation of the fullerene nanoparticles occurs, especially at higher electrolyte concentrations, we ...
A sand dryer and storage to produce 10,000 mt of high quality pure silica sand for Glass making, foundry sand, sand for sand blasting, golf sand, sports turf sand for atletics field and for water filtration
Feb 01, 2006· The amount of humic acid that we could coat onto the sand was around 1 mg/g of sand (), which is similar to the result obtained using sol-gel immobilization .Koopal et al. reported a surface coverage of humic acid of 56 mg/g, but used a much smaller-sized silica support than we did. On a per surface area basis, our 26 mg/m 2 compares with 1.1 mg/m 2 from Koopal et al. .
Aug 01, 2020· The influence of sand quantity on the coating of sand with humic acid was investigated and also the cadmium sorption capacity used to evaluate the efficacy of coating process. The results have been plotted in Fig. 2 and the quantity of the sand was varied from 0.1 to 1 g per 50 mL of aqueous solution that contained of dissolved humic acids.
The present invention is directed to a foundry sand additive composition, and method of casting molten metal against a foundry sand containing the additive composition. The additive composition comprises a humic acid-containing and/or a humic acid salt-containing ore (hereinafter referred to separately or in combination as "humic-containing ore") and carbon or graphite or admixtures of carbon ...
Apr 29, 2017· Raw silica and humic acid. Discussion in 'Growing Organic Marijuana' started by Fumalettuce, Apr 18, 2017. Fumalettuce Member. Joined: May 11, 2016 Messages: 9 Likes Received: 1 #1 Fumalettuce, Apr 18, 2017. Whatsup yall. Need a little advice. Starting my no-till and i want all inputs to be super clean and organic. I have gotten most of my ...
The transport and retention kinetics of Alizarin red S (ARS)-labeled nHAP were investigated in water-saturated packed columns that encompassed a range of humic acid concentrations (HA, 0–10 mg L–1), fractional surface coverage of iron oxyhydroxide coatings on sand grains (λ, 0–0.75), and pH (6.0–10.5).
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Modification of humic acid with silica results in the adsorption of Pb 2+, Cu 2+, and Cd 2+ (Siliva et al. 2008). Mesoporous organosilicas prepared by direct co-condensation of TEOS (tetraethyl ...
Nano silicon particles (nSiO2) is one of the most widely used industrial engineered nanomaterials (ENMs). The extensive applications of nSiO2 may pose potential risks to aquatic ecosystems and human health. Humic acid (HA) is a major component of soil and water that exists widely in the natural environment and adsorbs to the surface of nanoparticles, which affects the fate and transport of ...
De très nombreux exemples de phrases traduites contenant "humic acid coated silica" – Dictionnaire français-anglais et moteur de recherche de traductions françaises.
Four minerals (ferrihydrite, kaolinite, illite, and smectite) and a humic acid were coated on silica sand grains. Coated grains were packed into columns and the hydrodynamic properties of the media were determined with anionic tracers. The hydrodynamic properties of the various coated silica sands were similar, suggesting that porous media with ...
Deep-bed filtration of humic acid in the presence of the coagulant ferric chloride was performed in a continuous flow column (98 mm diameter, 750 mm long) filled with silica sand grains of 0.65 mm.
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Jan 01, 2008· Humic acid is part of the humic substances that are extracted as a by-product from peat processing. The generation of humic substances is an inexpensive, large volume source that could provide a cost effective source of needed surfactant. ... Three glass columns packed with silica sand were initially saturated with water; the water was then ...
Preparation of Quartz Sand Coated with Colloidal Humic Acid–Goethite The colloidal humic acid–goethite (HA-Goe) suspension used in this study was synthesized according to the method of Meckenstock and Bosch (2014) and provided by the University of Duisburg-Essen. This colloidal material has been particu-larly developed for subsurface injection.
Aims: To develop an anti-microbial filter media using an attached quaternary ammonium compound (QAC) and evaluate its performance under conditions relevant to drinking water treatment in developing countries. Methods and results: Silica sand was coated with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride via covalent silane chemistry.
Aggregation and aggregates properties of natural organic and nanosized macromolecules such as humic substances and proteins are crucial to explore so-called colloid-mediated transport and the fate of substances in soil and water environments. Therefore, the aggregation and dispersion, charging, and floc strength of lysozyme (LSZ)–leonardite humic acid (LHA) flocs were experimentally ...
Zyme Granules is a product developed with a combination of Fulvic Acid, Amino Acid Humic acid,Nutrients, Enzymes, Crude Proteins, and Alganic acid extracts from selected Seaweed.Zyme Granules improves the properties of the soil, increases nutrient required for growth and water holding capacity .As such it enhances quality & yield of the crops like paddy, sugarcane, wheat and vegetables etc.
Here, we investigated the transport and retention of a model enzyme lysozyme (LSZ) with/without the presence of purified Aldrich humic acid (PAHA) by saturated transport experiments in heterogeneous sand columns containing mixtures of uncoated (QS) and goethite-coated quartz sand (GQS) with (GQS/(QS + GQS)) mass fractions w = 0, 0.1, 0.3 and 0.5.
The deposition kinetics of fullerene (C60) nanoparticles onto bare silica surfaces and surfaces precoated with humic acid and alginate are investigated over a range of monovalent (NaCl) and divalent (CaCl2) salt concentrations using a quartz crystal microbalance. Because simultaneous aggregation of the fullerene nanoparticles occurs, especially at higher electrolyte concentrations, we ...
Humic acids of low ash content (0.1–0.5 per cent) could be obtained by the use of hot reagents. Of all the extractants used at room temperature, pyrophosphate produced the humic acid of lowest ash content (∼ 0.2 per cent). The Fe 2 O 3 content of the humic acids was not …
For the mixed foulants the presence of modest amounts of humic acid (<15 mg/L) tended to reduce both MFIUF and specific resistance below that of the colloidal silica alone (50–150 mg/L).
Download Citation | Effect of humic acid on the sedimentation and transport of nanoparticles silica in water-saturated porous media | Purpose Nano silicon particles (nSiO2) is one of the most ...