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In order to study the effect of chlorine dioxide(ClO2) inactivating Cryptosporidium and Giardia in water, different factors as ClO2 concentration, contact time, pH, temperature, turbidity and organic content which might influence the inactivation were studied by using fluorescence staining method. With the Cryptosporidium and Giardia were 1×106 cysts/ml, turbidity 1.0NTU, temperature 22¡æ, pH 7.5,...
Lack of safe drinking water is a major problem in rural areas, it also persists in places like irrigation districts. this study was carried out to establish the accessibility of water in rural areas of Jinghuiqu Irrigation District(JHQID). In these areas, main sources of water for domestic purposes were groundwater and the piped water coverage rate was low, only 1,204,500 residents got their drinking...
Arsenic is a kind of substance with high toxicity. Arsenic pollution exists in the drinking water of rural areas, which would be harmful for human health. Based on adsorption methods, this article designed a water treatment system to remove arsenic from drinking water in the rural areas. The water treatment system uses a stabilized waste material as the adsorption material to meet the need for dispersed...
Six common disinfectants were studied for their effects in water on Tubifex species, Monopylephorus limosus, frequently found in tap water in many places of China recently. These disinfectants include sodium hypochlorite, liquid chlorine, chloramines, chlorine dioxide, hydrogen peroxide, and potassium permanganate composite. It was found that 100% mortality rate could be achieved within two hours...
In recent years, the occurrence and fate of antibiotics in the aquatic environment have been the subjects of many investigations in several countries. Tetracyclines (TCs) comprise an important group of pharmaceuticals in today's human and veterinary medical practice. However, they undergo slow degradation and transformation in the aquatic environment. The removal of tetracycline (TC) and oxytetracycline...
Removal of bromate by ferrous sulfate reduction was studied using water plant filter effluent spiked with bromate. Effects of FeSO4 dosage, reaction time, pH and DO concentration on bromate reduction were investigated. Removal of residue total iron by GAC was also studied. Results showed that, when initial bromate concentration is about 25 mug/L, pH is 7.2, DO concentration is 2.3 mg/L, temperature...
The effectiveness of enhanced pollutants removal of pre-oxidation process with potassium permanganate composites (PPC) was studied in laboratory scale and full-scale, with polluted raw water of the navigation channel of the Pearl River and the West River respectively. The results from the jar tests demonstrate that PPC has an enhanced effect on coagulation, filtration and organic matters removal for...
The increasing demand for clean drinking water has significantly intensified the need for long lifetime, inexpensive water sterilization systems. With bottled water increasing in popularity, purity regulations need to be reconsidered. Contrary to popular opinion bottled water can contain high concentrations of bacteria; this concern must be addressed. Magnetic pulse compressors for PEF applications...
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