Enhanced adsorption of natural organic matter on calcium carbonate particles through surface charge modification

Mesostructured carbon (MSC) has been synthesized by the carbonization of assynthesized mesocellular siliceous foam (MCF)/P123 nanocomposite followed by the dissolution of the silica using 10 wt.% HF solution. SEM, TEM, and BET instruments were used to characterize the mesostructured carbon. Batch experiments were performed to evaluate its ability to adsorb natural organic matter (NOM) in various pH levels. MSC showed enhanced adsorption capacity for NOM than the commercial activated carbons. MSC possessed approximately 3.3 and 2.2 times greater the solid-water partitioning coefficient of NOM, Kd, at pH 7 than coal-based and coconutbased activated carbons, respectively. This increased Kd of MSC resulted from mesoporous structures in the range of 4-6 nm on the surface. The Kd value decreased with increasing initial pH levels, which is considered to be due to ionization of functional groups of NOM.

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THE INTERACTION OF NATURAL ORGANIC MATTER WITH GRAIN SURFACES: IMPLICATIONS FOR CALCIUM CARBONATE PRECIPITATION

Carbonate Cements ◽

10.2110/pec.85.36.0017 ◽

1985 ◽

pp. 17-31 ◽

Cited By ~ 23

Author(s):

RICHARD M. MITTERER ◽

ROBERT CUNNINGHAM

Keyword(s):

Organic Matter ◽

Calcium Carbonate ◽

Natural Organic Matter ◽

Carbonate Precipitation ◽

Calcium Carbonate Precipitation

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The Interaction of Natural Organic Matter with Grain Surfaces: Implications for Calcium Carbonate Precipitation: ABSTRACT

AAPG Bulletin ◽

10.1306/03b5b312-16d1-11d7-8645000102c1865d ◽

1983 ◽

Vol 67 ◽

Author(s):

Richard M. Mitterer, Robert Cunning

Keyword(s):

Organic Matter ◽

Calcium Carbonate ◽

Natural Organic Matter ◽

Carbonate Precipitation ◽

Calcium Carbonate Precipitation

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Enhancing an adsorption-membrane hybrid system with microground activated carbon

Water Science & Technology Water Supply ◽

10.2166/ws.2004.0108 ◽

2004 ◽

Vol 4 (5-6) ◽

pp. 189-197 ◽

Cited By ~ 2

Author(s):

Y. Matsui ◽

Y. Fukuda ◽

T. Inoue ◽

T. Matsushita ◽

N. Aoki ◽

...

Keyword(s):

Particle Size ◽

Organic Matter ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Activated Carbons ◽

Pore Blocking ◽

Key Factor ◽

Mixing Method ◽

Enhanced Adsorption ◽

Final Extent

The effects of particle size and mixing method of adsorbent during pretreatment in a microfiltration system were investigated. Micrometre-size powdered activated carbons (PACs) obtained by pulverization of an as-received PAC removed natural organic matter (NOM) from water much more efficiently than the as-received PAC, without additional membrane fouling and trans-membrane pressure buildup. The dosage of micrometre-size PAC required for pretreatment was one-sixth the equipollent dosage of the as-received PAC. The coagulant – PAC dosing sequence did not affect the extent of NOM removal, suggesting that the reduction of PAC-pore-blocking macromolecules by coagulation before PAC adsorption was not a key factor in improving the final extent of NOM removal. The mechanism of the enhanced adsorption by micrometre-size PAC seems to involve increases in the adsorption capacity itself, as well as increases in adsorption kinetics.

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Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

Agrokémia és Talajtan ◽

10.1556/agrokem.59.2010.1.12 ◽

2010 ◽

Vol 59 (1) ◽

pp. 99-108 ◽

Cited By ~ 3

Author(s):

M. Takács ◽

Gy. Füleky

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Natural Organic Matter ◽

Extraction Methods ◽

Soil Samples ◽

Hot Water ◽

Soil Extracts ◽

Water Percolation ◽

Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

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