College of Standardization, China Jiliang University, Hangzhou 310018, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
Sci Total Environ. 2021 Mar 15;760:143405. doi: 10.1016/j.scitotenv.2020.143405. Epub 2020 Nov 6.
In order to reutilize FeO particles in flue gas from coal-fired power plant as a ferrum nutrient for improving microalgae growth, Na-Citrate was proposed to chelate FeCl derived from FeO and HCl reactions to promote biomass and lipid productivities of Chlorella PY-ZU1. Fe-Citrate gave much higher biomass and lipid productivities than FeCl, Fe-EDTA, Fe-DTPA and Fe-HEDTA, because organic chelator prevented Fe from depositing, lower stability constant resulted in easier dissociation of ferric chelate, smaller chelate facilitated Fe (reduced from Fe) transportation through cell membranes. The biomass growth and photosynthetic capacity of Chlorella PY-ZU1 cultivated with Fe-Citrate (converted from FeO particles) medium were similar to those with commercial ferric ammonium citrate medium. The biomass and lipid productivities of Chlorella PY-ZU1 cultivated with 5 mg L Fe-Citrate medium were 1.30 and 1.72 times, respectively, higher than those with FeCl growth medium.
为了将燃煤电厂烟气中的 FeO 颗粒重新用作促进微藻生长的铁营养物，提出了使用柠檬酸钠来螯合 FeCl，该 FeCl 由 FeO 和 HCl 反应生成，以提高小球藻 PY-ZU1 的生物量和脂类生产率。Fe-Citrate 比 FeCl、Fe-EDTA、Fe-DTPA 和 Fe-HEDTA 具有更高的生物量和脂类生产率，因为有机螯合剂防止了 Fe 的沉积，较低的稳定常数导致更易解离的铁螯合物，较小的螯合物促进了 Fe（由 Fe 还原而来）通过细胞膜的运输。用 Fe-Citrate（由 FeO 颗粒转化而来）培养基培养的小球藻 PY-ZU1 的生物量生长和光合作用能力与使用商业的柠檬酸铁铵培养基的情况相似。用 5mg/L Fe-Citrate 培养基培养小球藻 PY-ZU1 的生物量和脂类生产率分别比用 FeCl 生长培养基提高了 1.30 倍和 1.72 倍。
