scholarly journals Elemental and isotopic behaviour of Zn in Deccan basalt weathering profiles: Chemical weathering from bedrock to laterite and links to Zn deficiency in tropical soils

2018 ◽  
Vol 619-620 ◽  
pp. 1451-1463 ◽  
Author(s):  
Nils Suhr ◽  
Ronny Schoenberg ◽  
David Chew ◽  
Carolina Rosca ◽  
Mike Widdowson ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Tropical Soils ◽  
Zn Deficiency ◽  
Deccan Basalt ◽  
Basalt Weathering

Mineral magnetic characterization of the Godavari river sediments: Implications to Deccan basalt weathering

2014 ◽  
Vol 83 (4) ◽  
pp. 376-384 ◽  
Author(s):  
Y. R. Kulkarni ◽  
S. J. Sangode ◽  
D. C. Meshram ◽  
S. K. Patil ◽  
Yatindra Dutt
Keyword(s):  
River Sediments ◽  
Deccan Basalt ◽  
Magnetic Characterization ◽  
Godavari River ◽  
Basalt Weathering ◽  
Mineral Magnetic

Correlation of Atmospheric Dust and Rainfall as Basalt Chemical Weathering Precursors

2012 ◽  
Vol 1374 ◽  
pp. 205-214
Author(s):  
M. Teutli León ◽  
L.A. Térrez Tufiño ◽  
G. Jiménez Suárez ◽  
E. León Hernández ◽  
L.M. Tenorio Téllez
Keyword(s):  
Chemical Weathering ◽  
Anthropogenic Activities ◽  
Water Soluble ◽  
Oil And Grease ◽  
Atmospheric Dust ◽  
Environment Analysis ◽  
Soluble Ions ◽  
Basalt Weathering ◽  
A Site

ABSTRACTBasalt chemical weathering can be related to chemical composition of both atmospheric dust and rainfall, in published works authors have shown that weathered basalt exhibits a raise in anions like sulfate, nitrate, phosphate, chloride and carbonate, and doing a follow up of rainfall chemistry during 2009 at downtown Puebla, it was shown that rainfall has not an acid pH because there is a strong contribution from atmospheric dust.In this paper it is reported obtained results for dust samples collected during the dry season, collection was done in 3 places exposed to different environment, analysis of solid samples clearly reflect anthropogenic activities since the highest oil and grease content corresponds to a site with high population, also mineral carbonate amounts 30% in weight. An analytical sample was prepared and the filtrate used to measure pH which ranges from 6.3 to 7.84, and conductivity from 11.91-13.87 mS-cm-1. Main soluble ions range are as follow: sulfate 3.4-5.9 mg g-1, nitrate 0.19-0.54 mg g-1, chloride 0.7-8.91 mg g-1, sulfide 4-7 mg g-1, carbonate 304-364 mg g-1, this last correspond to 10% of the mineral content. Also, metals were determined as total (applying an acid digestion) and water soluble, obtained results allow to affirm that there are highly soluble metals like Ca, Pb (up to 97%), moderately soluble ones such as Cu and Mn (60% and 20% respectively) and non soluble ones like Al, Fe and Zn.It was confirmed that atmospheric dust has all properties, which could produce an alkalinization of rainwater. Also, its water soluble ionic content can be a source for those ions causing basalt weathering.

scholarly journals Geochemical Behavior of Different Chemical Elements during Weathering of the Basalts in Changbai Mountain, Northeast China

2021 ◽  
Vol 13 (22) ◽  
pp. 12796
Author(s):  
Tian Lan ◽  
Libo Hao ◽  
Jilong Lu ◽  
Yechang Yin ◽  
Xiaoqing Chen ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Chemical Elements ◽  
Major Elements ◽  
Parent Material ◽  
Changbai Mountain ◽  
Humid Climate ◽  
Mountain Area ◽  
Climate Conditions ◽  
Geochemical Cycle ◽  
Basalt Weathering

Rock weathering is the main source of element geochemical cycle, which has a very important impact on the environment. Three well-developed basalt weathering profiles in Changbai Mountain area are selected in this study, and the samples of parent rock, parent material layer, sedimentary layer, and leaching layer are systematically collected. The systematic study showed that the basalt in the study area experienced moderate chemical weathering under warm and humid climate conditions, with leaching of some major elements such as silicon and aluminum. The distribution of the rare earth elements (REE) in the weathering products recalls that of an alkali-basalt, with an evident fractionation between light- and heavy-REE. Such a feature is therefore referable to the parent volcanic rock, although with some degree of leaching.

scholarly journals The effect of soil properties on zinc lability and solubility in soils of Ethiopia – an isotopic dilution study

SOIL ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 255-268
Author(s):  
Abdul-Wahab Mossa ◽  
Dawd Gashu ◽  
Martin R. Broadley ◽  
Sarah J. Dunham ◽  
Steve P. McGrath ◽  
...  
Keyword(s):  
Soil Ph ◽  
Solid Phase ◽  
Tropical Soils ◽  
Soil Samples ◽  
Sub Saharan Africa ◽  
Isotopic Dilution ◽  
Zn Deficiency ◽  
Human Populations ◽  
Mean Values ◽  
Geochemical Properties

Abstract. Zinc (Zn) deficiency is a widespread nutritional problem in human populations, especially in sub-Saharan Africa (SSA). The Zn concentration of crops consumed depends in part on the Zn status of the soil. Improved understanding of factors controlling the phyto-availability of Zn in soils can contribute to potential agronomic interventions to tackle Zn deficiency, but many soil types in SSA are poorly studied. Soil samples (n=475) were collected from a large part of the Amhara Region of Ethiopia, where there is widespread Zn deficiency. Zinc status was quantified by measuring several fractions, including the pseudo-total (aqua regia digestion; ZnTot), available (DTPA (diethylenetriamine pentaacetate) extractable; ZnDTPA), soluble (dissolved in 0.01 M Ca(NO3); ZnSoln) and isotopically exchangeable Zn, using the enriched stable Zn isotope 70Zn (ZnE). Soil geochemical properties were assessed for their influence on Zn lability and solubility. A parameterized geochemical assemblage model (Windermere Humic Aqueous Model – WHAM) was also employed to predict the solid phase fractionation of Zn in tropical soils rather than using sequential chemical extractions. ZnTot ranged from 14.1 to 291 mg kg−1 (median = 100 mg kg−1), whereas ZnDTPA in the majority of soil samples was less than 0.5 mg kg−1, indicating widespread phyto-available Zn deficiency in these soils. The labile fraction of Zn in soil (ZnE as % ZnTot) was low, with median and mean values of 4.7 % and 8.0 %, respectively. Labile Zn partitioning between the solid and the solution phases of soil was highly pH dependent, where 94 % of the variation in the partitioning coefficient of 70Zn was explained by soil pH. Similarly, 86 % of the variation in ZnSoln was explained by soil pH. Zinc distribution between adsorbed ZnE and ZnSoln was controlled by pH. Notably, Zn isotopic exchangeability increased with soil pH. This contrasts with literature on contaminated and urban soils and may arise from covarying factors, such as contrasting soil clay mineralogy across the pH range of the soils used in the current study. These results could be used to improve agronomic interventions to tackle Zn deficiency in SSA.

scholarly journals Geochemical and glacio-geomorphic implications of basalt weathering in the Queen Maud Mountains, Antarctica

1982 ◽  
Vol 119 (6) ◽  
pp. 553-566 ◽  
Author(s):  
R. W. Talkington ◽  
P. A. Mayewski ◽  
H. E. Gaudette
Keyword(s):  
Air Temperature ◽  
Chemical Weathering ◽  
Surface Air Temperature ◽  
Rock Surface ◽  
Basaltic Glass ◽  
Mass Wasting ◽  
Physical Weathering ◽  
Weathering Processes ◽  
Heating And Cooling ◽  
Basalt Weathering

SummaryThe weathering of a suite of basalt clasts, that have been transported by mass wasting downslope in the Cumulus Hills region of the Queen Maud Mountains, Antarctica, is examined from both geochemical and glacio-geomorphic viewpoints. Chemical weathering, predominantly oxidation and hydration, increases in severity from clast core to rim for the suite. These weathering processes and concomitant formation of a weathering rind are suggested to be an accumulative process, culminating in the disaggregation of the rock due in part both to the chemical breakdown of the interstitial and intersertal basaltic glass and to physical weathering processes.Mass wasting rates in the range of 1.4 × 10−3−1.13 × 10−1 cm. y−1 are estimated, assuming that the style of transport is dry creep. These transport rates suggest that the rock-surface/air-temperature differences in the study area may have been as little as 0.5 °C and heating and cooling cycles as few as 1 cy. y−1 for the last 4.2 Ma.

scholarly journals Humic Acid Improves Zn Fertilization in Oxisols Successively Cultivated with Maize–Brachiaria

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4588
Author(s):  
Everton Geraldo de Morais ◽  
Carlos Alberto Silva ◽  
Keiji Jindo
Keyword(s):  
Humic Acid ◽  
Ftir Spectroscopy ◽  
Organic Matter Content ◽  
Zinc Content ◽  
Tropical Soils ◽  
Matter Content ◽  
Zn Deficiency ◽  
Dependent Manner ◽  
Global Issue ◽  
Combined Use

Zinc (Zn) is an essential micronutrient for plant growth, and Zn deficiency is a global issue, especially in tropical soils. This study aimed to investigate the effects of humic acid (HA) and the Zn addition (Zn sulfate + HA) on the growth of maize and brachiaria in two contrasting Oxisols. The potential complexation of Zn sulfate by HA was evaluated by Fourier-transform infrared (FTIR) spectroscopy analysis. Zinc content and its availability in solution and the shoot and root biomass of maize and brachiaria were determined. FTIR spectroscopy revealed the complexation of Zn sulfate by HA through its S and C functional groups. In both Oxisols, solution Zn increased due to the combined use of Zn and HA. In a soil type-dependent manner, maize biomass and Zn in its shoots were affected only by the exclusive use of Zn fertilization. In the Yellow Oxisol, brachiaria growth and Zn accumulated in its shoot were positively affected by the combined use of Zn fertilization with HA. In the Oxisol with lower organic matter content, HA can assure adequate supplying of residual Zn, while increasing growth of brachiaria cultivated in sequence to maize.

Compressive response of some agricultural soils influenced by the mineralogy and moisture

2013 ◽  
Vol 27 (3) ◽  
pp. 239-246 ◽  
Author(s):  
A.E. Ajayi ◽  
M.S. Dias Junior ◽  
N. Curi ◽  
I. Oladipo
Keyword(s):  
Agricultural Soils ◽  
Tropical Soils ◽  
Homogeneity Test ◽  
Confined Compression ◽  
Moisture Retention ◽  
Soil Mineralogy ◽  
Undisturbed Soil ◽  
Statistical Homogeneity ◽  
Compressive Response ◽  
Fine Clay

Abstract This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging from50 to 300 kPa at both sites. Analyses of the shape of the compression curves highlight the influence of soil moisture in shifts from the bi-linear to S-shaped models. Statistical homogeneity test of the load bearing capacity parameters showed that the soil mineralogy influences the response to loading by these soils. These observations provide a physical basis for the previous classification series of the soils in the studied area. We showed that the internal strength attributes of the soil could be inferred from the mineralogical properties and stress history. This could assist in decisions on sustainable mechanization in a datapoor environment.

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