Acid mine drainage treatment using by-products from quicklime manufacturing as neutralization chemicals

作者：Tolonen Emma Tuulia; Sarpola Arja; Hu Tao; Ramo Jaakko; Lassi Ulla^*

来源：Chemosphere, 2014, 117: 419-424.

DOI：10.1016/j.chemosphere.2014.07.090

• Acid mine drainage (AMD)
• Neutralization
• Quicklime
• By-products
• Wastewater treatment

The aim of this research was to investigate whether by-products from quicklime manufacturing could be used instead of commercial quicklime (CaO) or hydrated lime (Ca(OH)(2)), which are traditionally used as neutralization chemicals in acid mine drainage treatment. Four by-products were studied and the results were compared with quicklime and hydrated lime. The studied by-products were partly burnt lime stored outdoors, partly burnt lime stored in a silo, kiln dust and a mixture of partly burnt lime stored outdoors and dolomite. Present application options for these by-products are limited and they are largely considered waste. Chemical precipitation experiments were performed with the jar test. All the studied by-products removed over 99% of Al, As, Cd, Co, Cu, Fe, Mn, Ni, Zn and approximately 60% of sulphate from acid mine drainage. However, the neutralization capacity of the by-products and thus the amount of by-product needed as well as the amount of sludge produced varied. The results indicated that two out of the four studied by-products could be used as an alternative to quicklime or hydrated lime for acid mine drainage treatment.

• 出版日期2014-12