بهینه کردن جاذب همراه با نانوذره بتن متخلخل در کاهش بار آلودگی رواناب شهری با استفاده از روش تاگوچی

نوع مقاله: مقاله اصلی

نویسندگان

1 دانشجو دکتری، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران

2 دانشیار، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران

3 استادیار، گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران

10.22034/jewe.2020.231947.1362

چکیده

تأمین آب به‌عنوان ماده حیاتی بشر، در خیلی از کشورها به‌صورت بحران درآمده است. ایران با توجه به اقلیم خشک و نیمه‌خشک آن از آب­های شیرین بهره کمی برده است؛ بنابراین با توجه به نیاز مبرم به آب و همچنین کمبود منابع آب، جهت تأمین نیاز آبی در کشاورزی و فضای سبز باید در جهت بازچرخانی و استفاده مجدد از آب­های روان، برنامه‌های مدیریتی لازم را اعمال کرد. امروزه استفاده از روسازی متخلخل در معابر شهری از اهمیت ویژه­ای برخوردار می­باشد و می­توان از این نوع بتن در کاهش آلودگی­های آب استفاده کرد. به‌دلیل مفید بودن جاذب­های مختلف در کاهش آلودگی، در مقاله حاضر تأثیر جایگزینی جاذب­های پومیس، اسکریا، زئولیت و تراورتن با درصدهای حجمی 25، 50،75 و 100% و نانوذرات سولفید فلزی با 1، 2، 3 و 4% با سنگ‌دانه بتن متخلخل، بر پارامترهای کیفی در رواناب با روش تاگوچی بررسی‌ شده است. آزمایش­های مربوط به خواص فیزیکی در آزمایشگاه تکنولوژی بتن و آزمایش­های مربوط به پارامترهای کیفی در آزمایشگاه شیمی انجام شد. در این پژوهش از سه پارامتر افزودنی، درصد حجمی افزودنی و نانوذرات سولفید فلزی استفاده ‌شده است. در نهایت با استفاده از نرم­افزار مینی­تب و اکسل، پارامترها و تأثیر هر یک از آن‌ها در کاهش آلودگی بررسی شد. یافته­های پژوهش نشان داد که بیش‌ترین تأثیر بر کاهش آلایندگی را به­ترتیب درصد افزودنی، نوع افزودنی و میزان نانوذره دارد. در نهایت؛ اگر یک طرح اختلاط پیشنهاد شود که بیش­ترین حذف آلایندگی را داشته باشد؛ می‌توان 75% کسر حجمی و یک درصد نانوذره را معرفی کرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Optimizing Adsorbent with Porous Concrete Nanoparticles to Reduce the Pollution Load of Urban Runoff Using Taguchi Method

نویسندگان [English]

  • Emad Kahrizi 1
  • Taher Rajaei 2
  • Mehdi Sedighi 3
1 PhD Scholar, Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran
2 Assoc. Professor, Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran
3 Assist. Professor, Department of Chemical Engineering, Faculty of Engineering, University of Qom, Qom, Iran
چکیده [English]

Water is a vital substance for human and water supply has become a crisis in many arid countries. Due to arid and semi-arid climate of Iran, it has many challenges to supply fresh water. According to the urgent need for water and also the lack of water resources, it is a nessessity to implement the water management programs like recycle and reuse of runoffs in order to meet the water needs in agriculture and green space. Nowadays, use of concrete porous pavements in urban paths is increased significantly, and it can be used to reduce water pollution. Due to the usefulness of different adsorbents in reducing pollution, in this study the effect of replacing pumice, scria, zeolite and travertine adsorbents with volume percentages of 25, 50, 75 and 100% and metal sulfide nanoparticles with 1, 2, 3 and 4% with porous concrete aggregates on qualitative parameters in runoff have been investigated by Taguchi method. Experiments related to physical properties were performed in the concrete technology laboratory as well as tests related to qualitative parameters in the chemistry laboratory. In this study, three parameters of additive, volume percentage of additive and metal sulfide nanoparticles have been used. Finally, using Minitab and Excel software, the parameters and the effect of each of them in reducing pollution were investigated. The results showed that the greatest impact on reduction of pollution was the percentage of additive, type of additive and volume of nanoparticles, respectively. Finally, as a proposed concrete mix design that has the highest effect on pollution elimination, 75% of the volume fraction and 1% of the nanoparticle can be introduced.

کلیدواژه‌ها [English]

  • Nanoparticles
  • Porous concrete
  • runoff
  • Taguchi method
  • Water Pollution
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