The dual function of the algal treatment: Antibiotic elimination combined with CO2 fixation. (November 2018)

• Record Type: Journal Article
• Authors: Du, Yingxiang; Wang, Jing; Li, Haitao; Mao, Songbai; Wang, Dong; Xiang, Zhongrun; Guo, Ruixin; Chen, Jianqiu
• Is Part Of: Chemosphere. Volume 211(2018)
• Page Start: 192
• Page End: 201
• Publication Date: 2018-11
• Subjects: Algal treatment -- Antibiotic remove -- CO2 capture -- Metabolite analysis; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.07.163
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The study provided an algal treatment to achieve dual function with antibiotic elimination and CO2 fixation simultaneously. Two widely used antibiotics, cefradine and amoxicillin were selected as the target compounds. First of all, we assessed the influence of light intensity on algal growth and antibiotic removal efficiency to obtain the optimal light intensity. Secondly, after the algal antibiotic treatment, the CO2 capture capacities at varied CO2 volume concentrations were assessed and compared. Significant improvement in the removal efficiency of cefradine occurred when CO2 was added into the treatment. Change in the content of photosynthetic pigments and the activities of RuBisCO and carbonic anhydrase occurred as the algal responses to the treatment condition. Our results showed that Chlorella pyrenoidosa performed better than Microcystis aeruginosa in both the antibiotic removal efficiency and the CO2 capture capacity. In the integrated algal treatment, the remove rate of antibiotic has been improved by 30.16% and at the same time, the CO2 absorption rate has been promoted by 10.94%. Metabolite analyses also revealed the mechanism involved, which proved the crucial role of the algae in the biodegradation of the target antibiotic. Graphical abstract: Image 1 Highlights: Antibiotic removal and CO2 fixation could be achieved simultaneously. Added CO2 improved antibiotic removal efficiency in algal treatment. Photosynthetic pigments and enzymes activity were enhanced in C. pyrenoidosa . Metabolite analyses proved the crucial role of the algae in biodegradation.