QUANTITATIVE AND QUALITATIVE CHARACTERIZATION OF THE GRANULOMETRY OF AN INCEPTISOL

IF 0.5 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Quimica Nova Pub Date : 2023-05-29 DOI:10.21577/0100-4042.20230018
Janaina Schadosin, S. Saab, A. Brinatti, L. Pires
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Abstract

Granulometry is an initial factor to be considered in soil research as it plays a fundamental role in physical and chemical properties. The objective of this study was to characterize the granulometric fractions of soil, obtained using the screening and sedimentation method. The Dynamic Light Scattering (DLS), Mid-Infrared (MIR), and Scanning Electron Microscopy with Field Emission Gun (SEM-FEG) techniques were used for this purpose. The quantitative results showed that this soil presents high percentage of clay, followed by fine sand fraction, silt fraction and, finally, the coarse sand fraction. The results obtained by DLS qualify this technique as a procedure to evaluate the quality of the granulometric fractionation of the clay fraction. The MIR analyzes detected characteristic vibrational states of minerals such as kaolinite, halloysite, gibbsite, and quartz. Few works in the literature characterize the clay fraction of the soil without chemical treatment using the SEM-FEG technique. Thus, in this work, pseudo-hexagonal structures were identified, typical of the kaolinite mineral and, to a lesser extent, structures with a filamentous needle-like morphology, which can be ascribed to illite and/or halloysite, whose inorganic functional groups were identified by MIR in the clay fraction of the soil.
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首赛地醇颗粒剂的定量和定性研究
粒度是土壤研究中首先要考虑的因素,因为它对土壤的物理和化学性质起着至关重要的作用。本研究的目的是表征土壤的颗粒组分,通过筛选和沉淀法获得。动态光散射(DLS),中红外(MIR)和扫描电子显微镜与场发射枪(SEM-FEG)技术用于此目的。定量结果表明,该土中粘土含量较高,其次为细砂、粉砂,最后为粗砂。结果表明,DLS技术可作为评价粘土粒级分馏质量的一种方法。MIR分析检测到的矿物特征振动状态,如高岭石、高岭石、三长石和石英。文献中很少有使用SEM-FEG技术表征未经化学处理的土壤粘土部分。因此,在这项工作中,鉴定了伪六边形结构,这是典型的高岭石矿物,在较小程度上,具有丝状针状形态的结构,可归因于伊利石和/或高岭土,其无机官能团在土壤的粘土部分通过MIR鉴定。
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来源期刊
Quimica Nova
Quimica Nova 化学-化学综合
CiteScore
1.60
自引率
12.50%
发文量
72
审稿时长
2-4 weeks
期刊介绍: Química Nova publishes in portuguese, spanish and english, original research articles, revisions, technical notes and articles about education in chemistry. All the manuscripts submitted to QN are evaluated by, at least, two reviewers (from Brazil and abroad) of recognized expertise in the field of chemistry involved in the manuscript. The Editorial Council can be eventually asked to review manuscripts. Editors are responsible for the final edition of QN.
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