Microbial removal of engine oil from polluted media (the case study: Hamadan City)
Abstract:
Discharging industrial wastes into the soil causes accumulation of pollutants, especially petroleum hydrocarbons and used engine oil, in the environment. This study was done to find some bacterial strains capable of removing the engine oil from contaminated soils. Soil samples contaminated by engine oil were collected from some polluted area of Hamadan City, and then their bacterial strains were isolated and classified on the basis of morphological keys and biochemical tests. The efficiency of these bacterial strains in removing the pollutant was evaluated in minimal salt medium (MSM) containing 1% engine oil. The optical density (OD) of the media was measured as an indicator of bacterial growth and degradation of the engine oil during day 0, 5, 10, and 15 at 600 nm wavelength. The bacterial strain responsible for the highest OD was chosen as the effective one, and the efficiency of oil removing was evaluated for this bacterial strain. In this study, eight bacterial strains called EODB1-8 were isolated. The results of the OD determination showed that the four bacterial strains caused more turbidity in the samples. The effects of time, type of bacteria, and their interaction effects were also significant in all samples. The turbidity of the samples was increased with increasing exposure time. The maximum turbidity was caused by the bacterial strain EODB4 and it was introduced as the best engine oil degrading bacterial strain. Its engine oil removal efficiency was evaluated to be 62.85% and it was identified as Pseudomonas alcaligenes using morphological keys and biochemical identification methods.
Article Type:
Research/Original Article
Language:
English
Published:
Journal of Advances in Environmental Health Research, Volume:5 Issue: 2, 2017
Pages:
114 - 122
magiran.com/p1768040  
برخی از خدمات از جمله دانلود متن مقالات تنها به مشترکان مگیران ارایه می‌گردد. شما می‌توانید به یکی از روش‌های زیر مشترک شوید:
اشتراک شخصی
در سایت عضو شوید و هزینه اشتراک یک‌ساله سایت به مبلغ 300,000ريال را پرداخت کنید. همزمان با برقراری دوره اشتراک بسته دانلود 100 مطلب نیز برای شما فعال خواهد شد!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی همه کاربران به متن مطالب خریداری نمایند!
توجه!
  • دسترسی به متن مقالات این پایگاه در قالب ارایه خدمات کتابخانه دیجیتال و با دریافت حق عضویت صورت می‌گیرد و مگیران بهایی برای هر مقاله تعیین نکرده و وجهی بابت آن دریافت نمی‌کند.
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.