+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

The effect of adsorbed humic substances on the colloid stability of hematite particles

The effect of adsorbed humic substances on the colloid stability of hematite particles

Colloids and Surfaces 5(2): 85-92

Rate constants (k) were measured for the Ca2+-induced coagulation of hematite particles in the presence of different amounts of humic substances at pH 6.6. Values of k at 1 mg humics/l were .apprx. 1 order of magnitude greater than those at 20 mg/l at all CaCl2 concentrations studied (0.001-0.5 M). The enhanced stability apparently is not due to charge stabilization, since electrophoretic mobilities were almost independent of the extent of adsorption. Steric stabilization at high adsorption density is a likely explanation. Interpretation of the results is complicated by the increase (up to 4- to 5-fold) in humic adsorption with CaCl2 concentration.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 006636388

Download citation: RISBibTeXText

Related references

Effect of humic and fulvic acids on soil aggregation under trees. Journal of the Indian Society of Soil Science 35(4): 717-720, 1987

Effect of humic acid on aluminum toxicity in corn plants. Soil Science 141(1): 20-25, 1986

Humic substances in swamps of the Myall Lakes region, N.S.W. Australian Journal of Soil Research 16(1): 41-52, 1978

Studies on aggregate stability i. re formation of soil aggregates. Journal of Soil Science 37(2): 329-336, 1986

Interaction of granular maize starch with lysophosphatidylcholine evaluated by calorimetry, mechanical and microscopy analysis. Journal of cereal science 38(3): 269-279, 2003

Using COSMO/SkyMed X-band and ENVISAT C-band SAR interferometry for landslides analysis. Remote Sensing of Environment 119(none): 0-285, 2012

Effect of sintering temperature on the luminescence properties of Ca0.8Ba0.2TiO3:Pr(3+) red-emitting phosphor. Luminescence 30(5): 503-506, 2015

The effect of humic matter on plant growth. II. Effect on yield and nutrient uptake.. Albrecht-Thaer-Arch 4: 493-506, 1960

Iron iii chelate reductase activity of plasma membranes isolated from tomato lycopersicon esculentum mill. roots comparison of enzymes from iron deficient and iron sufficient roots. Plant Physiology 97(2): 537-544, 1991

Raman spectra of human dentin mineral. European Journal of Oral Sciences 104(2 Part 1): 123-131, 1996

Sorption of K+ (86Rb) by spring barley (Hordeum vulgare L.) roots. Rostlinna vyroba Ceskoslovenska akademie zemedelska Ustav vedeckotechnickych informaci pro zemedelstvi 32(4): 397-402, 1986

Collision-induced fragmentation of deprotonated methoxylated flavonoids, obtained by electrospray ionization mass spectrometry. Journal of Mass Spectrometry 36(2): 169-178, 2001

Effect of natural gas production on geochemistry and microbiology in a fractured organic-rich shale. Geochimica et Cosmochimica Acta 73.13S: A661, 2009

Partitioning and transport of (super 210) Pb in Lake Michigan. Journal of Great Lakes Research 15(3): 498-509, 1989

Influence of chloride and sulphate ions on soil enzymes. Journal Of Agronomy and Crop Science. 175(2): 129-133, 1995