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The Tubotomaculum Enigma and the Rise of Benthic Life During the Opening of the Western Mediterranean Basin. [PDF]
GeobiologyBernardini S +10 more
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Mechanistic and comparative laboratory assessment of lime dosage and uniaxial geogrid on the strength and durability of classified lateritic subgrade. [PDF]
Sci RepImoh UU +3 more
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Competitive sorption of Cu and Cr on goethite and goethite–bacteria complex
Chemical Engineering Journal, 2012Abstract Sorption of Cu and Cr in single and binary sorbate systems on goethite and goethite–Bacillus thuringiensis complex was studied. It was observed that the initial sorption rate and sorption capacity of heavy metals on goethite–B. thuringiensis complex were greater than that on goethite in single system at studied pH. The competitive ability of
Qiaoyun Huang, Antonio Violante
exaly +3 more sources
Advances in Colloid and Interface Science, 2003
Aging of synthetic goethite at 140 degrees C overnight leads to a composite material in which hematite is detectable by Mössbauer spectroscopy, but X-ray diffraction does not reveal any hematite peaks. The pristine point of zero charge (PZC) of synthetic goethite was found at pH 9.4 as the common intersection point of potentiometric titration curves at
Marek Kosmulski +2 more
exaly +3 more sources
Aging of synthetic goethite at 140 degrees C overnight leads to a composite material in which hematite is detectable by Mössbauer spectroscopy, but X-ray diffraction does not reveal any hematite peaks. The pristine point of zero charge (PZC) of synthetic goethite was found at pH 9.4 as the common intersection point of potentiometric titration curves at
Marek Kosmulski +2 more
exaly +3 more sources
Reactions of nitrite with goethite and surface Fe(II)-goethite complexes
Science of The Total Environment, 2021Chemodenitrification-the abiotic (chemical) reduction of nitrite (NO2-) by iron (II)-plays an important role in nitrogen cycling due in part to this process serving as a source of nitrous oxide (N2O). Questions remain about the fate of NO2- in the presence of mineral surfaces formed during chemodenitrification, such as iron(III) (hydr) oxides ...
P, Dhakal +6 more
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Sulfate Adsorption on Goethite
Journal of Colloid and Interface Science, 1999Recent spectroscopic work has suggested that only one surface species of sulfate is dominant on hematite. Sulfate is therefore a very suitable anion to test and develop adsorption models for variable charge minerals. We have studied sulfate adsorption on goethite covering a large range of sulfate concentrations, surface coverages, pH values, and ...
Rietra, R.P.J.J. +2 more
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Adsorption of paraquat on goethite and humic acid-coated goethite
Journal of Hazardous Materials, 2010Adsorption of cationic pesticides in soils is generally attributed to mineral clays and organic matter components. However, iron oxides may also contribute to such adsorption or affect it by associating with other components. Using goethite and humic acid as models for iron oxides and organic matter respectively, we studied the adsorption of the ...
Ana, Iglesias +5 more
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Adsorption of MCPA on goethite and humic acid-coated goethite
Chemosphere, 2010Anionic pesticides are adsorbed on the mineral oxide fraction of the soil surface but considerably less on the organic fraction, so that the presence of organic matter causes a decrease in the amount of pesticide adsorbed, and may affect the mechanism of adsorption.
A, Iglesias +5 more
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Surface structures of gibbsite goethite and phosphated goethite
Nature, 1974INFRARED studies of surface hydroxyls on solids of high area have been limited to almost anhydrous materials prepared at elevated temperatures. These studies have made an important contribution to the understanding of surface catalysis, but have little relevance to adsorption processes that occur on moist surfaces at ambient temperatures.
J. D. RUSSELL +3 more
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2020
Iron oxides are ubiquitous in Earth’s crust. Its redox reactions in the environment not only control the cycling and availability of important elements such as C, N, S, but also influence the speciation and mobility of contaminants. During the last few decades, significant advances have been made in understanding the reaction of Fe(II) with Fe(III ...
Luiza Notini de Andrade +6 more
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Iron oxides are ubiquitous in Earth’s crust. Its redox reactions in the environment not only control the cycling and availability of important elements such as C, N, S, but also influence the speciation and mobility of contaminants. During the last few decades, significant advances have been made in understanding the reaction of Fe(II) with Fe(III ...
Luiza Notini de Andrade +6 more
openaire +1 more source