1. Department
of Environmental Engineering, Kyungpook National University, 80 Daehek-Ro, Bukgu, Daegu 702-701, Republic of Korea
2. Department
of Environmental Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 712-749, Republic of Korea
3. Discipline
of Inorganic Materials and Catalysis, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research (CSIR-CSMCRI), G. B. Marg, Bhavnagar, Gujarat 364002, India