[1] Univ 3of Malaya, Fac Sci, Dept Geol, Kuala Lumpur 50603, Malaysia
[2] Quaid I Azam Univ, Dept Plant Sci, Islamabad 45320, Pakistan
[3] Univ Malaya, Dept Civil Engn, Kuala Lumpur 50603, Malaysia
[4] King Abdulaziz Univ, Dept Hydrol & Water Resources Management, Jeddah 22254, Saudi Arabia
[5] Univ Malaya, Dept Chem, Kuala Lumpur 50603, Malaysia