Demonstration of a methodology for measuring the neutralization potential in coal waste.

This paper presents an easy-to-understand and easy-to-use methodology for monitoring the neutralization potential of residues derived from coal preparation. The methodology was developed based on the chemical composition of the waste and the relationship between calcium and sulfur. The effectiveness of this, in the control of residues, is demonstrated through in situ testing in a coal preparation plant in San Juan de Sabinas, Coahuila. The tests were carried out by collecting samples in three waste streams for five days at the plant. The methodology presents a strong linear correlation between the neutralization potential and the Ca/S ratio of 0.91. The estimation of neutralization potential through the Ca/S ratio represents a practical, easy-to-apply methodology that saves time and favors the decision-making required by waste management plans, to avoid the generation of acid drainage in coal waste. [ABSTRACT FROM AUTHOR]