**5. Treatment technology for AMD**

Treatment of AMD is broadly classified into active and passive treatments which is clearly shown in **Figure 6** [17]. The active method is more complicated and required more unit measures and the operational cost is high than other treatment

*Performance Evaluation of Waste Materials for the Treatment of Acid Mine Drainage… DOI: http://dx.doi.org/10.5772/intechopen.99669*

methods like passive treatment. The various strategy applied by the various nations for the AMD treatment comprising precipitation, neutralization, ion exchange, electrochemical remediation, adsorption oxidation, etc. All these methods are used for wastewater treatment among which the adsorption technique is the most suitable method for being comparatively economically viable and eco-friendly [18].
