پتانسیل خوردگی و رسوب گذاری در شبکه توزیع آب آشامیدنی: مطالعه موردی شهر مشهد، 1396

نوع مقاله: مقالات پژوهشى اصیل کمی و کیفی

نویسندگان

1 استاد، گروه مهندسی بهداشت محیط، مرکز تحقیقات مدیریت و عوامل اجتماعی موثر بر سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی مشهد، ایران

2 استادیار، گروه آموزش بهداشت، مرکز تحقیقات مدیریت و عوامل اجتماعی موثر بر سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی مشهد، ایران

3 کارشناس آزمایشگاه آب/ شرکت سهامی آب منطقه ای خراسان رضوی

4 مسئول آزمایشگاه شرکت سهامی آب منطقه ای خراسان رضوی

5 رئیس گروه آمار، شرکت سهامی آب منطقه ای خراسان رضوی

6 کارشناس گروه پایش کیفی، شرکت سهامی آب منطقه ای خراسان رضوی

7 دانشجو/دانشکده بهداشت مشهدکارشناسی ارشد، گروه مهندسی بهداشت محیط، کمیته تحیقیقات دانشجویی، دانشگاه علوم پزشکی مشهد، ایران

8 دانشجوی دکترای مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط، کمیته تحقیقات دانشجویی، دانشکده بهداشت، دانشگاه علوم پزشکی جندی شاپور اهواز، اهواز، ایران. /دانشکده بهداشت مشهد

چکیده

چکیده
زمینه و هدف: خوردگی و رسوب­گذاری لوله­های شبکه توزیع، یکی از شاخص­های مهم ارزیابی کیفی آب و نیز از متداول‌ترین فرآیندهای زیان‌آوری است که سبب کاهش کیفیت، رنگ، بو و طعم آب آشامیدنی و افزایش فلزات سنگین در آب می­گردد. خوردگی سبب ورود محصولات جانبی به آب و کاهش عمر لوله و رسوب­گذاری سبب کاهش دبی و کاهش کارایی شیرها و اتصالات می­گردد. مطالعه حاضر با هدف تعیین وضعیت خورندگی و یا رسوب­گذاری آب شبکه توزیع آب شهر مشهد انجام شد.
مواد و روش‌ها: در مطالعه مقطعی حاضر، 72 نمونه از سطح شهر مشهد در سال 1396 به منظور بررسی خصوصیات کیفی آب، برداشت و بر اساس روش­های مندرج در کتاب مرجع آزمایش­های آب و فاضلاب مورد آنالیز قرار گرفت. سپس سه شاخص لانژلیه، رایزنر و تهاجمی در نرم‌افزار اکسل برنامه‌نویسی شده و خورندگی و رسوب­گذاری آب تعیین گردید.
یافته‌ها: میانگین کلی شاخص­های لانژلیه، رایزنر و تهاجمی برای آب شهر به‌ترتیب 0/14±0/48، 0/38±6/67 و 0/23±12/2 بود. بر اساس شاخص لانژلیه و رایزنر، 1/86% از کل نقاط مورد مطالعه رسوب‌گذار کم می­باشند و بر اساس شاخص تهاجمی، 97/2% از کل نقاط رسوب‌گذار می­باشند. همچنین نتایج نشان داد 58/3% نمونه ­های بررسی شده در فصل بهار رسوب­گذاری کم و سایر نمونه­ ها رسوب‌گذار زیاد می­باشند. در فصل تابستان 33/3% از کل نمونه ­ها رسوب‌گذار زیاد و سایر نمو نه­ها رسوب‌گذار کم می­باشند.

کلیدواژه‌ها


عنوان مقاله [English]

Corrosion and Scaling Potential in drinking water distribution system: a case study of Mashhad, 2017

نویسندگان [English]

  • Hosein Alidadi 1
  • Seyedeh Blin Tavakoli Sani 2
  • Batoul Zarif gharaati oftadeh 3
  • Mohammad Tafaghodi 4
  • Seyed Hossein Shams Zadeh 5
  • Maryam Fakhari 6
  • Ali Asghar Navaei fezabady 7
  • Mohsen Yazdani 8
1 Professor, Management & Social Determinants of Health Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of Health Education and Health Promotion, Faculty of Health, Mashhad University of Medical Sciences, Mashhad, Iran
3 Laboratory Expert/ Khorasan Razavi Regional Water Authority
4 M.Sc. Chemistry, Azad University of Mashhad, Laboratory Head, Khorasan Razavi Regional Water Authority, Mashhad, Iran
5 M. Sc. in Water Resource Engineering, Head of Statistics Department, Khorasan Razavi Regional Water Authority, Mashhad, Iran
6 Qualification Expert, Khorasan Razavi Regional Water Authority, Mashhad, Iran
7 M.Sc. Department of Environmental Health Engineering, Student Research Committee, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
8 PhD student of Environmental Health Engineering, Department of Environmental health Engineering, Student Research Committee, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
چکیده [English]

Background and objectives: Corrosion and Scaling in distribution network pipes is one of the most important indices in water quality evaluation and one of the most common environmental phenomena that deteriorate water quality, color, odor, taste and also increases the concentration of heavy metals in water. Corrosion causes entry of bye-products to water and decreases pipe life and sedimentation, reduces the flow rate and the efficiency of valves and fittings. The purpose of this study was to determine the corrosion or Scaling state of drinking water in Mashhad in 2017.
Material and methods: In this study, 72 samples were taken during 2017 to evaluate water quality characteristics, and analyzed based on the standard methods. Then, three indices including Langlier, Ryznar and Aggressiveness Indices were programmed in Excel software and based on this, Corrosion and scaling potential of drinking water were determined.
Results: Results showed that the averages of Langlier, Ryznar and Aggressiveness Indices for water were 0.14±0.48, 6.67±0.38 and 12.23±0.23, respectively. According to the Langlier and Ryznar indices, 86.1% of total samples had low scaling potential and according to Aggressive index 97.2% of total samples had scaling. Also, the results showed that 58.33% of the samples were low scaling in spring and other samples were high scaling. In addition, in the summer, 33.3% of the total samples were high scaling and other samples were low scaling.
Conclusion: The results showed that drinking water of Mashhad city was Scaling. Therefore, it is necessary to take measures to control scaling in distribution network pipes, especially in areas located in high scaling zones.

کلیدواژه‌ها [English]

  • Distribution Network
  • water
  • Corrosion
  • Scaling
  • Mashhad

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