School of Environmental Sciences;
University of East Anglia;
Norwich Research Park;
Norwich NR4 7TJ;
UK;
Food and Environmental Protection Laboratory;
International Atomic Energy Agency;
1400 Vienna;
Austria;
Key Laboratory of Mountain Surface Processes and Ecological Regulation;
Institute of Mountain Hazards and Environment;
Chinese Academyof Sciences;
Chengdu 610041;
China;
Antibiotics; Sulphonamide; Groundwater contamination; Biodegradation; Stable isotope fractionation; IRMS;