Leachability of Trace Metal Elements from Fly Ash Concrete: Results from Column-Leaching and Batch-Leaching Tests

2001 ◽  
Vol 98 (2) ◽  
Keyword(s):  
Fly Ash ◽  
Trace Metal ◽  
Leaching Tests ◽  
Column Leaching ◽  
Metal Elements ◽  
Fly Ash Concrete ◽  
Trace Metal Elements

scholarly journals Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

2018 ◽  
Vol 15 (10) ◽  
pp. 2317 ◽  
Author(s):  
Jiu Huang ◽  
Peng Wang ◽  
Chaorong Xu ◽  
Zhuangzhuang Zhu
Keyword(s):  
Fly Ash ◽  
Trace Metal ◽  
Soil Layer ◽  
Fly Ashes ◽  
Migration Ability ◽  
Metal Elements ◽  
Trace Metal Elements ◽  
Simulated Precipitation ◽  
Backfill Materials

In China, coalmine wastes, such as gangues, are used for reclamation of mining subsided land. However, as waste rocks, gangues contain several trace metal elements, which could be released under natural weathering and hydrodynamic leaching effects and then migrate into the reclamed soil layer. However, it is very difficult to find adequate other backfill materials for substitution of gangues. In this paper, we present a novel method and case study to restrict the migration ability of trace metal elements in gangues by using another kind of coalmine solid waste—fly ashes from coal combustion. In this study, fly ashes were mixed with gangues in different mass proportions 1:0.2, 1:0.4, 1:0.6 and 1:0.8 as new designed backfill materials. Due to the help of fly ash, the occurrence states of studied trace metal elements were greatly changed, and their releasing and migration ability under hydrodynamic leaching effect were also significantly restricted. In this research seven trace metal elements in gangues Cu, Zn, Pb, Cd, Cr, Mn and Ni were studied by using soil column hydrodynamical leaching method and simulated precipitation for one year. The results show that under the driving of natural precipitation trace metal elements were generally transported deep inside the reconstructed land base, i.e., far away from soil layer and most of the trace metal elements were transformed into a bonded state, or combined in inert occurrence states, especially the residual state. With this method, the migration activities of tested trace metal elements were greatly restricted and the environmental potential risk could be significantly reduced.

scholarly journals Simultaneous Determination of Cr, As, Se, and Other Trace Metal Elements in Seawater by ICP-MS with Hybrid Simultaneous Preconcentration Combining Iron Hydroxide Coprecipitation and Solid Phase Extraction Using Chelating Resin

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Akihide Itoh ◽  
Masato Ono ◽  
Kota Suzuki ◽  
Takumi Yasuda ◽  
Kazuhiko Nakano ◽  
...  
Keyword(s):  
Trace Metal ◽  
Solid Phase ◽  
Iron Hydroxide ◽  
Environmental Water ◽  
Chelating Resin ◽  
Metal Elements ◽  
Icp Ms ◽  
Trace Metal Elements ◽  
Hydroxide Coprecipitation

In the present study, ICP-MS with a new hybrid simultaneous preconcentration combining solid phase extraction using chelating resin and iron hydroxide coprecipitation in one batch at a single pH adjustment (pH 6.0) were developed for multielement determination of trace metal ions in seawater. In multielement determination, the present method makes it possible to determine Cr(III), As(V), Se (IV), and other 14 trace metal elements (Ti, V, Co, Ni, Cu, Zn, Zr, Ge, Cd, Sb, Sn, W, Pb, and U) in seawater. Moreover, for speciation analyses of Cr, As, and Se, the pH dependence on recovery for the different chemical forms of Cr, As, and Se was investigated. In speciation analyses, Cr, As, and Se were determined as the total of Cr (III) and a part of Cr (VI), total of As (III) and As (V), and Se(IV), respectively. Determination of total of Se and Cr(VI) remains as future task to improve. Nevertheless, the present method would have possibility to develop as the analytical method to determine comprehensively most metal elements in all standard and guideline values in quality standard in environmental water in Japan, that is, most toxic metal elements in environmental water.

Seasonal effect on trace metal elements behaviour in a reservoir of northern Thailand

2012 ◽  
Vol 185 (7) ◽  
pp. 5523-5536 ◽  
Author(s):  
S. Grellier ◽  
J. L. Janeau ◽  
W. Thothong ◽  
A. Boonsaner ◽  
M. P. Bonnet ◽  
...  
Keyword(s):  
Trace Metal ◽  
Seasonal Effect ◽  
Northern Thailand ◽  
Metal Elements ◽  
Trace Metal Elements

Contents of Trace Metal Elements in Cow Milk Impacted by Different Feedstuffs

2015 ◽  
Vol 22 (3) ◽  
pp. 54-61 ◽  
Author(s):  
Song Ren-ju ◽  
Tong Hui-li ◽  
Huang Jian-guo ◽  
Gao Xue-jun
Keyword(s):  
Trace Metal ◽  
Cow Milk ◽  
Metal Elements ◽  
Trace Metal Elements

Estimation of trace metal elements in oral mucosa specimens by using SR-XRF, PIXE, and XAFS

BioMetals ◽  
2014 ◽  
Vol 28 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Tomoko Sugiyama ◽  
Motohiro Uo ◽  
Takahiro Wada ◽  
Daisuke Omagari ◽  
Kazuo Komiyama ◽  
...  
Keyword(s):  
Trace Metal ◽  
Oral Mucosa ◽  
Metal Elements ◽  
Sr Xrf ◽  
Trace Metal Elements
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