scholarly journals The Dynamics of Tungsten in Soil: An Overview

Environments ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 66
Author(s):  
Gianniantonio Petruzzelli ◽  
Francesca Pedron
Keyword(s):  
Everyday Life ◽  
Soil Ph ◽  
Food Chain ◽  
Green Energy ◽  
Basic Information ◽  
Environmental Legislation ◽  
Soil Environment ◽  
Aluminum Oxides ◽  
Adsorption And Desorption ◽  
Iron And Aluminum Oxides

The increasing use of tungsten in the production of green energy in the aerospace and military industries, and in many other hi-tech applications, may increase the content of this element in soil. This overview examines some aspects of the behavior of tungsten in soil, such as the importance of characteristics of soils in relation to bioavailability processes, the chemical approaches to evaluate tungsten mobility in the soil environment and the importance of adsorption and desorption processes. Tungsten behavior depends on soil properties of which the most important is soil pH, which determines the solubility and polymerization of tungstate ions and the characteristics of the adsorbing soil surfaces. During the adsorption and desorption of tungsten, iron, and aluminum oxides, and hydroxides play a key role as they are the most important adsorbing surfaces for tungsten. The behavior of tungsten compounds in the soil determines the transfer of this element in plants and therefore in the food chain. Despite the growing importance of tungsten in everyday life, environmental regulations concerning soil do not take this element into consideration. The purpose of this review is also to provide some basic information that could be useful when considering tungsten in environmental legislation.

Research Progress in Enhancement Technology of Phytoremediation

2015 ◽  
Vol 768 ◽  
pp. 150-154
Author(s):  
Yi Yun Liu ◽  
Shuang Cui ◽  
Qing Han ◽  
Qian Ru Zhang
Keyword(s):  
Heavy Metal ◽  
Food Chain ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
New Technology ◽  
Research Progress ◽  
Agricultural Activity ◽  
Practical Application ◽  
Soil Environment ◽  
Article Analysis

Due to the influence of human, industrial and agricultural activity, a large amount of toxic and harmful heavy metal enter into the soil environment. Heavy metal can easily bio-accumulate through food chain, which cause serious damage to human health. Phytoremediation emerges as a new technology in exploration of effective methods for remediation and rebuild of heavy metal contaminated soils. Although phytoremediation shows great potential in remediation of heavy metal contaminated soil, there still exists many problems in practical application. This article analysis the problems existing in phytoremediation, summarizes the research progress of the technology in application from all the perspective of phytoremediation processes.

Porous Permeable SHS Cermets Based on Iron and Aluminum Oxides

2018 ◽  
Vol 38 (3) ◽  
pp. 182-188 ◽  
Author(s):  
T. V. Novoselova ◽  
L. V. Tolmacheva ◽  
Yu. G. Chernega ◽  
M. A. Kolomeets ◽  
A. V. Maetskii ◽  
...  
Keyword(s):  
Aluminum Oxides ◽  
Iron And Aluminum Oxides

Interaction of Molten Iron with Ceramics Based on Iron and Aluminum Oxides

2004 ◽  
Vol 30 (1) ◽  
pp. 90-97 ◽  
Author(s):  
Yu. P. Udalov ◽  
B. A. Lavrov ◽  
V. V. Smirnov ◽  
D. Yu. Sharov ◽  
A. S. Sidorov
Keyword(s):  
Molten Iron ◽  
Aluminum Oxides ◽  
Iron And Aluminum Oxides

Bonding of chlorophenols on iron and aluminum oxides

1991 ◽  
Vol 25 (4) ◽  
pp. 702-709 ◽  
Author(s):  
King Hsi S. Kung ◽  
Murray B. McBride
Keyword(s):  
Aluminum Oxides ◽  
Iron And Aluminum Oxides

scholarly journals Effect of different pH levels on adsorption and desorption of Pb in contrasting parent materials of south eastern agro climatic zone of Nigeria

2021 ◽  
pp. 102-108
Author(s):  
Nkwopara U. N ◽  
Onwudike S.U ◽  
Ihem E.E ◽  
Osisi A.F ◽  
Egboka N.T
Keyword(s):  
Organic Matter ◽  
Soil Ph ◽  
Coastal Plain ◽  
Significant Positive Correlation ◽  
Olivine Basalt ◽  
The Other ◽  
Solution Ph ◽  
Adsorption And Desorption ◽  
Parent Materials ◽  
Positive Correlation

Lead adsorption and desorption at different pH levels in acid soils of diverse parent materials were evaluated. The soil samples were collected from soils underlain by olivine basalt (Ikom), coastal plain sands (Ihiagwa) and false bedded sandstone (Ishiagu). The collected samples were air -dried, crushed, sieved with a 2 mm sieve and analyzed in the laboratory. The adsorption of lead (Pb) increased with increasing solution pH. At pH 3, 4 and 6, the adsorption of Pb was higher in false bedded sandstone than the other soils. At pH 5, adsorption of Pb was higher in olivine basalt than the other soils. Except at pH 3, desorption of Pb was higher in coastal plain sands than the other soils. At the same time it was lower in false bedded sand stone than the other soils at all pH. At pH 5, adsorption of Pb had a significant positive correlation with organic matter (r =0.774481, p≤ 0.05), while at pH 6, it had a significant positive correlation with soil pH (r =0.738401, p ≤ 0.05). Organic matter and soil pH are the most critical soil properties affecting adsorption-desorption of Pb on these soils.

scholarly journals Plasma way to obtain ultrafine iron and aluminum oxides

2021 ◽  
pp. 66-71
Author(s):  
Alekcey Safronov ◽  
Vladimir Kuznetsov ◽  
Juliy Dudnik ◽  
Vasiliy Shiryaev ◽  
Olga Vasilieva
Keyword(s):  
Chemical Synthesis ◽  
Metal Oxides ◽  
Experimental Studies ◽  
Ultrafine Powders ◽  
Plasma Chemical ◽  
Aluminum Oxides ◽  
Plasma Chemical Synthesis ◽  
Plasma Torches ◽  
Nanosized Oxide ◽  
Iron And Aluminum Oxides

The paper deals with two plasma-chemical synthesis installations based on alternating cur-rent plasma torches with power up to 30 kW, which can be used for production of ultrafine (nanosized) oxide and carbide materials. Some results obtained during experimental studies on the production of ultrafine powders of metal oxides (iron and aluminum) are presented.

scholarly journals Effect on Chemical and Physical Properties of Soil Each Peat Moss, Elemental Sulfur, and Sulfur-Oxidizing Bacteria

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1901
Author(s):  
So-Young Lee ◽  
Eun-Gyeong Kim ◽  
Jae-Ryoung Park ◽  
Young-Hyun Ryu ◽  
Won Moon ◽  
...  
Keyword(s):  
Soil Ph ◽  
Elemental Sulfur ◽  
Organic Matter Content ◽  
Matter Content ◽  
Peat Moss ◽  
Soil Environment ◽  
Biological Factors ◽  
Sulfur Oxidizing ◽  
Properties Of Soil ◽  
Sulfur Oxidizing Bacteria

Peat moss is an organic substance corroded by sphagnum moss and has a pH of 3.0–4.0. Elemental sulfur is sulfated and oxidized by the action of bacteria to become sulfuric acid. These biological factors can alter the soil environment. Blueberries require soil with a pH of 4.5–5.2 and high organic matter content. In this experiment, we investigated whether different treatment rates of peat moss, elemental sulfur, and sulfur-oxidizing bacteria affect changes in soil pH, physicochemical properties, and electrical conductivity. We detected strong changes in soil pH as a reaction to the supply of peat moss, elemental sulfur, and sulfur-oxidizing bacteria. The pH of the soil when peat moss and elemental sulfur each were supplied was reduced. In addition, the pH decreased faster when elemental sulfur and sulfur-oxidizing bacteria were supplied together than elemental sulfur alone, satisfying an acidic soil environment suitable for blueberry cultivation. In this experiment, it is shown that peat moss, elemental sulfur, and sulfur-oxidizing bacteria are suitable for lowering soil pH. It was demonstrated that when elemental sulfur and sulfur-oxidizing bacteria were treated together, the pH decreased faster than when treated with peat moss. It could be economically beneficial to farmers to use elemental sulfur and sulfur-oxidizing bacteria, which are cheaper than peat moss, to reduce the pH of the soil.

scholarly journals The Role of Soil pH in Plant Nutrition and Soil Remediation

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Dora Neina
Keyword(s):  
Plant Growth ◽  
Soil Remediation ◽  
Soil Ph ◽  
Soil Acidification ◽  
Plant Nutrition ◽  
Biomass Yield ◽  
Biological Processes ◽  
Biogeochemical Processes ◽  
Soil Environment

In the natural environment, soil pH has an enormous influence on soil biogeochemical processes. Soil pH is, therefore, described as the “master soil variable” that influences myriads of soil biological, chemical, and physical properties and processes that affect plant growth and biomass yield. This paper discusses how soil pH affects processes that are interlinked with the biological, geological, and chemical aspects of the soil environment as well as how these processes, through anthropogenic interventions, induce changes in soil pH. Unlike traditional discussions on the various causes of soil pH, particularly soil acidification, this paper focuses on relationships and effects as far as soil biogeochemistry is concerned. Firstly, the effects of soil pH on substance availability, mobility, and soil biological processes are discussed followed by the biogenic regulation of soil pH. It is concluded that soil pH can broadly be applied in two broad areas, i.e., nutrient cycling and plant nutrition and soil remediation (bioremediation and physicochemical remediation).

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