Journal
CHEMOSPHERE
Volume 95, Issue -, Pages 274-280Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.09.004
Keywords
Coal gangue brick; Firing process; Natural radionuclide; Toxic element; Behavior
Categories
Funding
- National Natural Science Foundation of China [41173032]
- National Science and Technology Support Program [2012BAC10B02]
- Key Program for Science and Technology Development of Anhui Province [12010402111]
- Creative Project of the Huainan Mining Industry (Group) Co. Ltd.
Ask authors/readers for more resources
The behaviors of natural radionuclides and toxic elements during coal gangue brick making processes are described. A simulation experiment of coal gangue brick firing was carried out to evaluate the enrichments of natural radionuclides and volatilizations of elements. Simultaneous sampling of coal gangue and corresponding combustion product (slag) was performed. The radioactivities of the radionuclide were determined by high-purity germanium gamma ray spectrometer, and the concentrations of toxic elements were analyzed by ICP-MS. Results have shown that the level of natural radionuclides may not cause immediate or acute environmental impacts because the Ra-eq values and H-ex (in the brick) are 345 Bq kg(-1) and 0.89, lower than the limit values of 370 Bq kg(-1), and 1, respectively. However, the Ra-eq and H-ex values are near the limit values, their chronic-environmental and health impacts should be considered noteworthy. The elements found in the emission could be categorized into two types: non-volatilized elements (Co, Cr, Mn and V) and volatilized elements (As, Cd, Cu, Ni, Se, Sn and Zn). Understanding the behaviors of natural radionuclides and toxic elements during brick making processes is helpful for the assessment of their potential impacts to human health and the environment. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available