Effects from Converter Slag and Electric Arc Furnace Slag on Chlorophyll a Accumulation of Nannochloropsis sp.

Applied Sciences

Fuping Wang¹  Shuang Cai¹  Yanan Zeng¹  Qing Yu¹  Di Gao¹  Tianji Liu¹  Junguo Li¹  Yitong Wang¹  Xiaoman Wang¹ 

[1] College of Metallurgy and Energy, North China University of Science and Technology, 21 Bohai Street, Tangshan 063210, China;

关键词: leaching solutions;    converter slag;    electric arc furnace slag;    Nannochloropsis sp.;    chlorophyll a;    CO₂ content;   

DOI  :  10.3390/app11199127

来源: DOAJ

【 摘 要 】

The effects of Ca²⁺ in converter slag and electric arc furnace slag leaching solutions on CO₂ content, the effects of CO₂ content in solutions on the accumulation of chlorophyll a of Nannochloropsis sp., and the mechanisms were studied. Results showed that addition of 50 mg/L converter slag leaching solution and 400 mg/L electric arc furnace slag leaching solution (lower than 50 vol% concentration) promoted the accumulation of chlorophyll a of Nannochloropsis sp., while an increased concentration of 70 vol% inhibited its accumulation. The highest concentration of chlorophyll a was obtained on the addition of 10 vol%. With 10 vol% leaching solutions added, chlorophyll a concentration for converter slag reached 4.2 mg/L, 1.45 times as much as that of pure F/2 medium, and chlorophyll a concentration for electric arc slag reached 3.2 mg/L, 1.10 times as much as that of pure F/2 medium. Under the same addition proportion, the promoting or inhibiting effect from converter slag on the accumulation of chlorophyll a of Nannochloropsis sp. was more obvious than that for electric arc furnace slag. The reason for the promotion of chlorophyll a accumulation of Nannochloropsis sp. was that an increase of Ca²⁺ in the solutions led to an increase of CO₂, thereby promoting the photosynthetic rate of microalgae. The study provided new ideas for the green application of solid waste and industrial production of microalgae.

【 授权许可】

Unknown