To understand the interactions between CMC90K-RNIP and sand grains in the presence of humic acid, and between HA-RNIP and sand grains, as well as the effect of HA on the transport of CMC90K-RNIP in a porous medium, the total interaction energy was calculated. Fig. 5 b compares the total interaction energy profiles (V T) simulated in …

The deposition kinetics of fullerene (C 60) nanoparticles onto bare silica surfaces and surfaces precoated with humic acid and alginate are investigated over a range of monovalent (NaCl) and divalent (CaCl 2) salt concentrations using a quartz crystal microbalance.Because simultaneous aggregation of the fullerene nanoparticles occurs, …

@article{Li2021InteractionBH, title={Interaction between humic acid and silica in reverse osmosis membrane fouling process: A spectroscopic and molecular dynamics insight.}, author={Danyang Li and Weichen Lin and Ruipeng Shao and Yue-xiao Shen and Xianzheng Zhu and Xia Huang}, journal={Water research}, year={2021}, …

The detoxification by several real-world sediments being mixtures of sand and clay was in-between silica and montmorillonite. Humic acid detoxified most effectively on weight basis. ... Polynomial relationships ('QSARs') were established for algal toxicity of MAQ in the presence of montmorillonite, silica and humic acid with carbon chain ...

A novel solid-phase extraction (SPE) sorbent, humic acid-bonded silica (HAS), was prepared. Humic acids (HAs) were grafted onto silica matrices via an amide linkage between humyl chloride and the ...

Uranyl carbonate (UC(VI)) is a stable form of uranyl (U(VI)) that widely coexists with amorphous colloidal silica (ACSi) and humic acid (HA) in carbonate-rich U-contaminated areas. In this context, the cotransport behavior and mechanism of UC(VI) with ACSi (100 mg L-1) and HA colloids in saturated porous media were systematically …

a Retardation factor R as the function of humic acid, b deposition coefficient μ 1 as the function of humic acid, and c maximum mass required to form a mono-layer coverage q max as the function of humic acid, applying to GS1 (goethite/silica sand w/w = 1/10), GS2 (goethite/silica sand w/w = 1/5), and GS3 (goethite/silica sand w/w = 1/3 ...

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. …

Once adsorbed to soil colloids, the recovery rate of ciprofloxacin increased by 26.7% in uncoated sand column, 21.1% in iron oxide coated sand column, and 32.7% in humic acid coated sand column.

NH 4 Cl and CO(NH 2) 2 were employed as inorganic and organic N fertilizers, respectively, while humic acid (HA) was used as model humic substance. We found that for all three sized MPs (0.2, 1 and 2 µm) without HA, both types of N fertilizers decreased their transport/increased their retention in porous media (both quartz sand …

Humic acid can also be immobilized in a porous matrix using a soil-gel process, whereby a glassy matrix is produced through a series of hydrolysis and …

Request PDF | 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 widely ...

Effect of humic acid on the sedimentation and transport of nanoparticles silica in water-saturated porous media. Soils, Sec 4 • Ecotoxicology • Research …

In this study, we investigate the feasibility to produce porous media with similar hydrodynamic properties, but different surface characteristics. Four minerals (ferrihydrite, …

DOI: 10.1016/j.scitotenv.2014.06.075 Corpus ID: 9407060; The influence of humic acid and clay content on the transport of polymer-coated iron nanoparticles through sand. @article{Jung2014TheIO, title={The influence of humic acid and clay content on the transport of polymer-coated iron nanoparticles through sand.}, author={Bahngmi Jung …

DOI: 10.1007/s11368-019-02444-x Corpus ID: 201815337; Effect of humic acid on the sedimentation and transport of nanoparticles silica in water-saturated porous media @article{Zhang2020EffectOH, title={Effect of humic acid on the sedimentation and transport of nanoparticles silica in water-saturated porous media}, author={Mo Zhang …

Uranyl carbonate (UC(VI)) is a stable form of uranyl (U(VI)) that widely coexists with amorphous colloidal silica (ACSi) and humic acid (HA) in carbonate-rich U-contaminated areas. In this context, the cotransport behavior and mechanism of UC(VI) with ACSi (100 mg L −1) and HA colloids in saturated porous media were systematically …

As a typical DOM, humic acid (HA) ubiquitously exists in natural water, and its concentration in aqueous medium ranges from 0 to 20 mg L −1 ... Quartz sand (Standard Sand & Silica Co.) with size range of 0.425–0.600 mm was subsequently washed by DI water, 10% nitric acid (v: v) and DI water to remove the metal oxides from surface, and …

The transport and retention behaviors of titanium dioxide nanoparticles (nTiO 2) in iron oxide-coated sand were examined in water-saturated sand columns as functions of pH, ionic strength, and humic acid.Experimental breakthrough curves and retention profiles indicated that the transport and retention of nTiO 2 in the absence of …

Silica had a minor effect on the observed toxicity, whereas the clay mineral montmorillonite detoxified very effectively. The detoxification by several real-world sediments being mixtures of sand and clay was in-between silica and montmorillonite. Humic acid detoxified most effectively on weight basis.

Effect of humic acid (HA) on the sorption behaviour of 137Cs on silica colloids has been studied by batch procedure over a pH range of 3-10 and at ionic strength of 0.05 M (NaClO4).

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 ...

Aluminium speciation and pH of an acid soil in the presence of fluoride. Moore CS, Ritchie GSP Journal of soil science, 39(1):1-8, 01 Mar 1988

At ambient temperature the adsorption of humic acid on the quartz sand seems to be controlled mainly by electrical interaction between the organic particle and the solid substrate. A correlation ...

Soil Amendment: For granular or powdered forms, apply 2-5 pounds per 100 square feet and work it into the top 6-8 inches of soil. This is ideal during the planting season or when preparing beds. Foliar Spray: Liquid humic acid can be diluted with water and applied directly to plant leaves, providing a quick nutrient uptake boost.

The fouling propensity of an inorganic colloid (silica) and an organic (humic acid) and their mixture was studied in this paper. Fouling propensity was characterized as the modified fouling index (MFI UF) and specific cake resistance in dead-end UF at constant pressure.Experimental results for individual foulants demonstrated that MFI UF increased …

Results from this study suggest that natural organic matter and solution pH are likely key factors that govern the stability and mobility of nTiO(2) in the natural aquatic environment. The distinct effects of humic acid (HA, 0-10 mg L(-1)) on the transport of titanium dioxide (rutile) nanoparticles (nTiO(2)) through saturated sand columns were …

The adsorption of, the still widely used, herbicide atrazine on model soil components, such as humic acid and humic acid–silica gel mixtures, was investigated in a series of batch experiments, under different experimental conditions (ionic strength, temperature, and pH). The investigation aimed at obtaining an estimate of the …

The presence of humic acid, silica colloids, and SRS sediment was shown to synergistically effect the removal of U(VI). Uranium (VI) Removal at 50ppm Filtered between pH 3 and 8 for all batches

Effect of humic acid on the sedimentation and transport of nanoparticles silica in water-saturated porous media. …