1 23 Environment, Development and Sustainability A Multidisciplinary Approach to the Theory and Practice of Sustainable Development ISSN 1387-585X Volume 17 Number 3 Environ Dev Sustain (2015) 17:423-441 DOI 10.1007/s10668-014-9552-7 Influence of hydrogeochemical processes and assessment of suitability for groundwater uses in Busan City, Korea S. Y. Chung, S. Venkatramanan, T. H. Kim, D. S. Kim & T. Ramkumar