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Title: Charge fingerprint in relation to mineralogical composition of Quaternary volcanic ash along a climatic gradient on Java Island, Indonesia

Abstract

We studied the relationship between the mineralogical composition and surface charge properties of representative Quaternary volcanic ash soils, classified as Andosols, along an East-West sequence on Java Island in Indonesia. Most of the studied soils have a limited ability to retain cations under their forest or grass vegetation. The surface charge properties of these soils are mainly controlled by the relative amounts of nanocrystalline minerals, mainly allophane and to a lesser extent ferrihydrite, in addition to organic matter (especially Al- and Fe-humus complexes), crystalline Fe oxides, gibbsite, and layer silicates (e.g., halloysite, smectite, kaolinite). Based on the composition of their clay fraction, the studied soils can be grouped in two categories: (i) allophane-poor Andosols of East Java, which contain a considerable amount of either halloysite or a mixture of 2:1 and 1:1 layer silicates; and (ii) allophane-rich Andosols dominated either by kaolinitic clays, gibbsitic material or a mixture of 1:1 and 2:1 layer silicate clays, which are more prominent in West and also occur in Central Java. Differences between both groups are attributed mainly to more pronounced seasonality in East Java, with variations in parent ash composition, becoming more acidic from east to west, as subordinate factor. The more severelymore » leaching environment in West Java results in a higher degree of desilication , which led to a higher point of zero net charge (PZNC) and pHo in the allophane-rich soils. The soils belonging to this group exhibit extreme variable charge characteristics, and a net ‘positive’ variable surface charge at soil pH.« less

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [5]
  1. <-- Click to select University
  2. Royal Museum for Central Africa, Tervuren, Belgium
  3. Ghent University
  4. BATTELLE (PACIFIC NW LAB)
  5. Laboratory of Soil Science, University of Gent, Belgium
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1510977
Report Number(s):
PNNL-SA-135121
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
CATENA
Additional Journal Information:
Journal Volume: 172
Country of Publication:
United States
Language:
English

Citation Formats

Utami, S. R., Mees, Florias, Dumon, Mathijs, Qafoku, Nikolla, and Van Ranst, Eric. Charge fingerprint in relation to mineralogical composition of Quaternary volcanic ash along a climatic gradient on Java Island, Indonesia. United States: N. p., 2019. Web. doi:10.1016/j.catena.2018.09.024.
Utami, S. R., Mees, Florias, Dumon, Mathijs, Qafoku, Nikolla, & Van Ranst, Eric. Charge fingerprint in relation to mineralogical composition of Quaternary volcanic ash along a climatic gradient on Java Island, Indonesia. United States. doi:10.1016/j.catena.2018.09.024.
Utami, S. R., Mees, Florias, Dumon, Mathijs, Qafoku, Nikolla, and Van Ranst, Eric. Wed . "Charge fingerprint in relation to mineralogical composition of Quaternary volcanic ash along a climatic gradient on Java Island, Indonesia". United States. doi:10.1016/j.catena.2018.09.024.
@article{osti_1510977,
title = {Charge fingerprint in relation to mineralogical composition of Quaternary volcanic ash along a climatic gradient on Java Island, Indonesia},
author = {Utami, S. R. and Mees, Florias and Dumon, Mathijs and Qafoku, Nikolla and Van Ranst, Eric},
abstractNote = {We studied the relationship between the mineralogical composition and surface charge properties of representative Quaternary volcanic ash soils, classified as Andosols, along an East-West sequence on Java Island in Indonesia. Most of the studied soils have a limited ability to retain cations under their forest or grass vegetation. The surface charge properties of these soils are mainly controlled by the relative amounts of nanocrystalline minerals, mainly allophane and to a lesser extent ferrihydrite, in addition to organic matter (especially Al- and Fe-humus complexes), crystalline Fe oxides, gibbsite, and layer silicates (e.g., halloysite, smectite, kaolinite). Based on the composition of their clay fraction, the studied soils can be grouped in two categories: (i) allophane-poor Andosols of East Java, which contain a considerable amount of either halloysite or a mixture of 2:1 and 1:1 layer silicates; and (ii) allophane-rich Andosols dominated either by kaolinitic clays, gibbsitic material or a mixture of 1:1 and 2:1 layer silicate clays, which are more prominent in West and also occur in Central Java. Differences between both groups are attributed mainly to more pronounced seasonality in East Java, with variations in parent ash composition, becoming more acidic from east to west, as subordinate factor. The more severely leaching environment in West Java results in a higher degree of desilication , which led to a higher point of zero net charge (PZNC) and pHo in the allophane-rich soils. The soils belonging to this group exhibit extreme variable charge characteristics, and a net ‘positive’ variable surface charge at soil pH.},
doi = {10.1016/j.catena.2018.09.024},
journal = {CATENA},
number = ,
volume = 172,
place = {United States},
year = {2019},
month = {1}
}