جستجوی مقالات مرتبط با کلیدواژه "فریک کلراید" در نشریات گروه "پزشکی"

PolyDADMAC is used in water and waste water treatment as a primary organic coagulant which can neutralize colloidal material with negative charge and reduces sludge volume compared with Mineral coagulants. The aim of this study was to evaluate and compare of PolyDADMAC with ferric chloride as a coagulant on the removal of turbidity, Coliform and Organic matter from Ahvaz drinking water.
This study was carried out in a lab scale and using a jartest device in Ahwaz water treatment. In this research, the coagulation of raw water was studied using PolyDADMAC alone, and mixed coagulant of PolyDADMAC and ferric chloride at various dose and ferric chloride alone were compared. The study range was selected for turbidity (NTU3850, 80), pH (9-5) and different concentrations of coagulant material .Data analysis was performed using Excel, SPSS software and one way ANOVA (p The optimal efficiency conditions of PolyDADMAC in turbidity 3850 NTU, pH=8, Flash Mix =120rpm and resulted in an optimum dose of 0.5 mg/L which the highest turbidity removal percentage was to be 99.84% in optimal dose of 0.5ppm of coagulant. The optimum doses of ferric chloride with PolyDADMAC were obtained at 15mg/L and 0/4mg/L, respectively. Under higher doses of PolyDADMAC, flocs showed stabilized in solution .In addition, PolyDADMAC also produced larger floc with higher settling velocity that need less time to settle.
The results from the comparison of the effect of coagulants mentioned in the high turbidity removal (NTU 3850) indicate the good performance of PolyDADMAC as coagulant to ferric chloride Also, the results showed that the removal efficiency was affected by the initial turbidity so that the higher the initial turbidity, would be the more efficient the turbidity removal.

Drinking water treatment is very important owing to the importance of drinking water in human health. One of the most important methods to remove turbidity and organic substances from water sources is using proper coagulants to coagulate the water impurities. This study aimed to investigate the efficiency of coagulants i.e. Ferric Chloride (FeCl3) and poly-ferric sulfate (PFS) on removing turbidity and reducing organic material levels from raw water supplied from Yamchi reservoir to Ardabil water treatment plant.
Present experimental-analytical study was conducted by using Jar Testing equipment. Samples of the study were taken from the conduit feeding the water treatment plant in four seasons during 2013-2014. Two coagulants namely ferric chloride and poly-ferric sulfate were tested on 48 samples taken in 4 seasons of the year with the turbidity levels of 5.67, 12.7, 15.32, and 31.35 NTU.
Based on the results of this study PFS was more efficient than FeCl3 in terms of dosage of coagulant, size of coagulum, deposition time and production of sludge with higher viscosity. More specifically, PFS was able to remove 7% more dissolved organic carbon (DOC) from the samples than FeCl3; whereas decrease in value of pH was found to be lower by using PFS than FeCl3.
Based on the results, PFS can be used as a suitable and economic alternative for ferric chloride in water treatment plant of Ardabil City in terms of less coagulant dosage and high organic compounds removal efficiency.