Assessment of Water Quality Index and Heavy Metal Contamination in Active and Abandoned Iron Ore Mining Sites in Pahang, MalaysiaZafira Madzin, Faradiella Mohd Kusin, Fasihah Mohd Yusof and Siti Nurjaliah MuhammadMATEC Web Conf., 103 (2017) 05010DOI: https://doi.org/10.1051/matecconf/201710305010