@Article{jrm.2021.012335,
AUTHOR = {Xuying Guo, Saiou Fu, Junzhen Di, Yanrong Dong, Guoliang Jiang},
TITLE = {Study on the Treatment of Acid Mine Drainage Containing Fe2+ and Mn2+ Using Modified Spontaneous Combustion Gangue},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {9},
YEAR = {2021},
NUMBER = {3},
PAGES = {541--555},
URL = {http://www.techscience.com/jrm/v9n3/41234},
ISSN = {2164-6341},
ABSTRACT = {The high concentrations of Fe2+ and Mn2+ in acid mine drainage make
it difficult and expensive to treat. It is urgent that we find a cheap and efficient
adsorption material to treat Fe2+ and Mn2+. As a solid waste in mining areas, coal
gangue occupies a large area and pollutes the surrounding environment during the
stacking process. Developing a method of resource utilization is thus a research
hotspot. In this study, we modified spontaneous combustion gangue using NaOH,
NaCl, and HCl by chemically modifying the minerals. We determined the optimal
conditions for treating Fe2+ and Mn2+ in acid mine drainage with spontaneous
combustion gangue and modified coal gangue using the single factor test method.
Based on results of the static test, two dynamic test columns, column No. 1 (spontaneous combustion gangue) and column No. 2 (NaOH modified spontaneous
combustion gangue), were constructed, and the repair effects of acid mine drainage were compared and analyzed using dynamic experiments. The results show
that overall, NaOH modified spontaneous combustion gangue is the most efficient
at removing the Fe2+ and Mn2+ in acid mine drainage. The optimal conditions for
NaOH modification are an NaOH concentration of 3 mol/L, a liquid to solid ratio
of 2 L/kg, and a modification time of 8 h. The overall efficiency of column No. 2
at removing Fe2+ and Mn2+ from acid mine drainage is better than that of column
No. 1. Among them, the average removal efficiency of Fe2+ and Mn2+ from acid
mine drainage in column No. 2 were 97.73% and 44.82%, respectively. The above
results show that NaOH modified spontaneous combustion gangue is a good
adsorbent, which has application potential in wastewater remediation, as it can
achieve the purpose of “treating dust with waste”.},
DOI = {10.32604/jrm.2021.012335}
}