Metals Related to Radionuclides and Heavy Metals Removal Using Photosynthetic Bacteria Immobilized Recovery Type Porous Ceramic

Sasaki, Kohsuke; Hara, Chihiro; Takeno, Kenji; Okuhata, Hiroshi; Miyasaka, Hitoshi

doi:10.2521/jswtb.46.119

Cited by 6 publications

(51 citation statements)

References 11 publications

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“…Na concentration again fell to almost zero after one day both the static light and aerobic dark conditions. In the removal of Na by SSI, the negative charge of the EPS on the cell surface appear to function in the same way the adsorption of cationic heavy metals and radionuclide [1] [2]. However, the process by Rhodovulum sp.…”

Section: Na Removal From 1% Nacl Supplemented Gm Mediummentioning

confidence: 98%

“…Photosynthetic bacteria that produce extracellular polymeric substances (EPS) on the cell surface adsorb cationic metals such as Cd, Pb, Cr, Hg, Cu and As at rates between 85% and 100% using the negative charge of the EPS [1] [2]. By the same process, Rhodobacter sphaeroides SSI (SSI) able to remove radionuclides at rates of 95% for U, 82% for Sr and 58% for Co [2].…”

Section: Introductionmentioning

confidence: 99%

“…SSI strain was obtained as a spontaneous mutant which has self-flocculation ability from Rhodobacter sphaeroides S [2]. R. sphaeroides S has practically applications in wastewater treatment and has been used more than 40 years in Japan [11].…”

Section: Photosynthetic Bacteria and Mediamentioning

confidence: 99%

“…[5] and a fresh water photosynthetic bacterium, Rhodobacter sphaeroides SSI [2] [3] was also used, both of which produce EPS on the cell surface. Rhodovulum sp.…”

Section: Photosynthetic Bacteria and Mediamentioning

confidence: 99%

“…By the same process, Rhodobacter sphaeroides SSI (SSI) able to remove radionuclides at rates of 95% for U, 82% for Sr and 58% for Co [2]. SSI has also been observed to adsorb Cs from waste water at rates approaching about 100% [3], but this seems to be closely related to the potassium transport system of photosynthetic bacteria [4].…”

Section: Introductionmentioning

confidence: 99%

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Removal of Sodium from Seawater Medium Using Photosynthetic Bacteria

Sasaki¹,

Hosokawa²,

Takeno³

et al. 2017

JACEN

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The removal of sodium (Na) from seawater using two photosynthetic bacteria was investigated using Rhodobacter sphaeroides SSI (SSI) and Rhodovulum sp. which is a marine photosynthetic bacterium. Both Rhodovulum sp. and acclimated SSI were shown to grow well in a 3% NaCl supplemented glutamate-malate medium. The maximum rate of Na removal was 39.3% by SSI and 64.9% by Rhodovulum sp. after two days cultivation under static light conditions. However, Na was re-released back into the medium after two to three days. When a nutrient-supplemented seawater medium (3.3% NaCl, 13.10 gNa/l) was used, the maximum Na removal rates were 30.3% (9.05 gNa/l) by SSI and 48.9% (6.69 gNa/l) by Rhodovulum sp., under static light conditions. Similar growth and Na removal rates were found under aerobic dark cultivation. In this case, no re-release of Na was observed with either bacterium. Two stages culturing was conducted first, with Rhodovulum sp. and then with SSI replacement. The Na concentration was reduced to 0.79 gNa/l (94.0% removal) after cultivation for eight days under aerobic dark conditions. The supernatant was applied successfully as a liquid fertilizer in the cultivation of Japanese radish.

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Section: Na Removal From 1% Nacl Supplemented Gm Mediummentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Photosynthetic Bacteria and Mediamentioning

confidence: 99%

“…[5] and a fresh water photosynthetic bacterium, Rhodobacter sphaeroides SSI [2] [3] was also used, both of which produce EPS on the cell surface. Rhodovulum sp.…”

Section: Photosynthetic Bacteria and Mediamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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