جستجوی مقالات مرتبط با کلیدواژه "کیفیت فیزیکوشیمیایی آب" در نشریات گروه "پزشکی"

Physical and chemical quality of water is necessary for consumer’s acceptance, health promotion, and guarding of water distribution systems. The aim of this study was to determine the physical and chemical quality of drinking water in Qazvin.
Material and This cross-sectional study was conducted in 2014-2015. During three seasons a total of 150 samples were collected from different points of water distribution. Then, water pH, turbidity, residual chlorine, EC (Electrical Conductivity), TDS (Total Dissolved Solis), nitrate, total hardness, alkalinity, and concentrations of Pb, Hg, Cd and Cr were measured. Heavy metals were measured by atomic absorption spectrophotometerand other parameters were analyzed based on the Standard Method book. ANOVA was used for comparing the mean values between seasons.
The average values during three seasons were reported as the following: pH=7.47, turbidity=0.28±0.05 (NTU), residual chlorine =42±0.24 (mg/L), EC=623.46±48.99 (mS/cm), TDS = 499.52±49.92 (mg/L), nitrate =42.65±4.73 (mg/L), total hardness=148.33±1.4 (mg/L CaCo3), alkalinity=222.23±5.67 (mg/L CaCo3), and concentrations of Pb=0.008±0.0024 (mg/L), and Cr=0.031±0.002 (mg/L). The concentration of Hg and Cd were negligible in the total samples.
According to the obtained results, all the parameters were found to be within the permissible Iranian standards and the quality of Qazvin drinking water is safe for the consumers.

From health perspective, swimming pools must have appropriate physical, chemical, and microbial properties and must be desirably maintained. In this research, physicochemical parameters, microbial, and fungal contamination of swimming pools have been examined in Kerman.
This cross-sectional study was carried out in 2014-2015. Fifteen hundred samples were collected in four seasons. Microbial, and fungal contamination and temperature, free residual chlorine, turbidity, oxidation and revival parameters were measured. MINI TAB software was used for statistical analysis. After performing descriptive analysis of data, chi-square test, Pearson correlation and ANOVA were used to determine the relationship between the variables.
Of 1500 samples, 14.13% were contaminated with fungi saprophytes, 6.87% with pathogenic fungi, 13.40% with coliform bacteria, 4.66% with fecal coliform, 2.07% with heterotrophic bacteria, and 1.20% were infected with other bacteria. A significant correlation was found between the contamination and the seasons. From the physiochemical parameters perspective, 90% of samples lacked the required temperature standards and 45% lacked the standard of free residual chlorine. Water turbidity was 90% more than the standard.
The prevalence of contamination in Kerman pools in 2014-2015 was far less than before. It is recommended to continuously disinfect the surrounding environment including the pools platforms. The overuse of chlorine will had a negative impact on the other parameters.