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RECENT MINERAL DEPOSITION AND REMOBILIZATION PROCESSES IN CLINKER WASTE HEAPS IN THE VICINITY OF KCM SMELTER, PLOVDIV

AUTHOR/S: ATANASSOVA, R., KERESTEDJIAN, T.
Sunday 1 August 2010 by Libadmin2004

4th International Scientific Conference - SGEM2004, www.sgem.org, SGEM2004 Conference Proceedings/ ISBN: 954-918181-2, June 14-18, 2004, 409- 416pp

ABSTRACT

Clinker waste heaps in the vicinity of KCM smelter, Plovdiv, Bulgaria, expected to be
relatively insoluble, and hence inactive according to the environment, were found to be
affected by burning of spontaneously ignited carbonaceous material contained in it. This way
the waste heap represents an active chemical reactor. The investigation revealed that the
process turns the chemically resistant glassy phases into water soluble compounds,
abundantly found close to gas and vapour exhalations through deep cracks in the dump.
Deposited recent phases have been identified. Most of these phases are sulphates of Cu, Zn,
Fe, Mn and Al (chalcanthite, antlerite, bonattite, chalcocyanite, melanterite, copiapite,
halotrichite, and apjohnite) gypsum and native sulphur. Physical and chemical properties of
the exhalations have been measured and employed in the explanation of the specific mineral
assemblage formed. The result of the remobilization of the heavy metals is significant
increase in the environmental risk, including ground and surface water pollution as well as
airborne soil contamination. The knowledge of the described phenomenon is an important
element in the process of the development of proper management plan.