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Background and Aims: The discharge wastewater of hospital into surface and groundwater to be provide the major risks and challenges for the human. So, this study is an attempt to be examined the treatment and disposal of hospital wastewater status in Kermanshah Province in 2011-12. Materials and Methods: This study is a descriptive - analytic study was conducted that included all hospitals in Kermanshah province (19 private and public hospitals). Tools and methods of data collection through the Czech list (including 18 questions about general and specific information on the status of hospital treatment and sewage disposal) that were matched with the person. Finally the resulting data were recorded in the form of tables and graphs. Results: The results showed that total of 19 hospitals, 7 hospitals (36.8% of all hospitals) have a wastewater treatment system in use (active), 5 hospitals (24.4%) with a wastewater treatment system inactive and 7 Hospital (36.8 %) do not have a wastewater treatment plant. Conclusion: According to numerous risks that humans and the environment are faced with result in hospital wastewater discharged into municipal sewers, so the lack of wastewater treatment in 12 hospitals (63.15%) is concerned. So getting policies for the construction of wastewater treatment systems in all hospital and operation by companies and professionals in the field, chlorinated raw sewage (wastewater treated if possible) to reduce pollution entering the collection and treatment network House of sewage, Adequately monitor the health authorities, water companies and other related organizations are alternatives that can be very effective to meet the standards required in a hospital and Environmental Management System (ISO14000) in set of management processes to improve the quality adjustment of hospital waste.

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Introduction: During patients’ hemodialysis Circle, the amount of heavy metals in feed water to dialysis instrument and the patient’s blood are changed. The present study aims at evaluating the trend of lead, cadmium, chromium and zinc concentration in feed water to reverse osmosis, dialysis instrument and blood of hemodialysis patients in 7 hospitals of Kermanshah.
 Materials & methods: A total of 42 samples of feed water, 42 samples of reverse osmosis systems permeate and 42 samples of hemodialysis instrument permeate were collected from 7 hospitals in Kermanshah. The collected samples were analyzed and the concentration of lead, chromium, cadmium and zinc were determined by using ICP (DV-Optima2100 model) according to a standard method. Furthermore, statistical analysis was carried out by using one-sample t-test to compare mean quality of feed water of dialysis instrument with AAMI and EPH standards. In addition, ANOVA test was used for comparing the results of three sample groups.
Findings: The obtained results indicated that the mean concentration of lead, cadmium, chromium and zinc in feed water of reverse osmosis system (drinking water), were 18.53± 8.25, 0.706± 0.42, 86.06 ± 5.56, 112.67± 63.56pbb, respectively. Also, quantity of these constituents in the feed and permeate of electrolysis device was 18.81±5.32, 0.719±0.53, 84.25±2.46, 43.39±19.4pbb and 12.5±6.32, 1.39±0.87, 66.15±13.54, 60.38±22.39pbb, respectively. Due to obtained results, the removal efficiency of zinc and chromium by reverse osmosis system in dialysis instrument were 61.5 and 2.1%, respectively, while it was not effective in removing lead and cadmium metals. Discussion & Conclusion: Increasing the level of lead and cadmium in permeate water of the reverse osmosis system rather than the feed water indicated that the reverse osmosis membrane function is out of service as a result, it is required to be washed or replaced. Decreasing both lead and chromium metals in permeate solution of the dialysis instrument revealed the addition of the amount of those two hazardous metals to the blood of hemodialysis patients, which could be related to reverse osmosis membrane deficiency and high concentration of metals in its water permeate.