کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11032764 | 1645149 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic-cationic cassava starch composite for harvesting Chlorella sp. TISTR8236
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
Microalgae are cultured for their useful chemicals, but their development is restricted by the costs and difficulties of harvesting them. New composites, magnetic-cationic cassava starch, were successfully developed to facilitate harvesting. Compared to naked magnetic particles, the composites exhibited higher potential for algal cell recovery. In addition, harvest capacity through the composites was positively related to the degree of cationic substitution (DS) in modified cassava starch. The application of 500â¯mgâ¯Lâ1 composites with DS valueâ¯â¥â¯0.76 to recover 1â¯gâ¯Lâ1Chlorella sp. TISTR8236 (1.67â¯Â±â¯0.01â¯g-dry cell weight g-compositesâ1) from medium broth at pHâ¯9.5 was significantly (pâ¯â¤â¯0.005) >98% effective. The separation efficiency of this composite for 1â¯gâ¯Lâ1 algal biomass was evaluated under different composite doses (200 to 800â¯mgâ¯Lâ1) and pH levels (4 to 10). Ninety-five percent of the algal cell separation efficiency of the magnetic and 0.76 DS cationic starch composite was recorded, when applied to the 300â¯mgâ¯Lâ1 composite to harvest 1â¯gâ¯Lâ1Chlorella sp. TISTR8236 at pHâ¯10 within 2â¯min. The adsorption isotherm fit the Langmuir model. In addition, desorption of algal cells was conducted by adjustment of the pH of the culture medium. The highest desorption (9.69%) was recorded at pHâ¯12. These composite magnetic-cationic cassava starch particles were shown to be a new adsorption material for algal cell harvesting. This alternative composite for magnetic separation may represent an effective method for saving time and energy in algal industrial processing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Algal Research - Volume 35, November 2018, Pages 561-568
Journal: Algal Research - Volume 35, November 2018, Pages 561-568
نویسندگان
Kanthida Jangyubol, Kittiwut Kasemwong, Theppanya Charoenrat, Supenya Chittapun,