کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8852354 1618776 2018 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical fiber-mediated photosynthesis for enhanced subsurface oxygen delivery
ترجمه فارسی عنوان
فتوسنتز فیبر نوری برای تحویل اکسیژن زیر سطحی
کلمات کلیدی
خورشیدی، تجزیه زیستی، آلودگی، آب های زیرزمینی، خاک
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Remediation of polluted groundwater often requires oxygen delivery into subsurface to sustain aerobic bacteria. Air sparging or injection of oxygen containing solutions (e.g., hydrogen peroxide) into the subsurface are common. In this study visible light was delivered into the subsurface using radially emitting optical fibers. Phototrophic organisms grew near the optical fiber in a saturated sand column. When applying light in on-off cycles, dissolved oxygen (DO) varied from super saturation levels of >15 mg DO/L in presence of light to under-saturation (<5 mg DO/L) in absence of light. Non-photosynthetic bacteria dominated at longer radial distances from the fiber, presumably supported by soluble microbial products produced by the photosynthetic microorganisms. The dissolved oxygen variations alter redox condition changes in response to light demonstrate the potential to biologically deliver oxygen into the subsurface and support a diverse microbial community. The ability to deliver oxygen and modulate redox conditions on diurnal cycles using solar light may provide a sustainable, long term strategy for increasing dissolved oxygen levels in subsurface environments and maintaining diverse biological communities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 195, March 2018, Pages 742-748
نویسندگان
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