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ASSESSING THE REMOVAL OF INORGANIC COLLOIDS AND CRYPTOSPORIDIUM PARVUM FROM DRINKING WATER
Citation:
Gitis, V., R C. Haught*, R M. Clark*, AND G. Rothenberg. ASSESSING THE REMOVAL OF INORGANIC COLLOIDS AND CRYPTOSPORIDIUM PARVUM FROM DRINKING WATER. Clark, T. (ed.), JOURNAL OF ENVIRONMENTAL MONITORING. Royal Society of Chemistry, Cambridge, Uk, 4(1):1-7, (2002).
Description:
A new batch device that simulates the conditions in water and wastewater treatment plant and enables the study of low-concentration feeds is described. The application of this appartus to the monitoring of the contaminants is demonstrated, using kaolin particles and Cryptosporidium parvum oocysts, respectively. The rate of inorganic particle attachment to the attachment to the static medium is found to be directly proportional to the initial influent concentration. On the other hand, Cryptosporidium parvum removal is found to be more effective in the presence of additional (kaloin) particles, and this is attributed to electrostatic interactions between oppositely charged layers on the absorbing medium. Accordingly, the addition of humic materials is found to inhib the removal process, possibly by neutralizing the positive charge on the kaolin particles. The relevance of these results toexisting water purification processes in general and to risk assessment of microbiological contamination in particular is discussed.