title: Efficient recovery of nitrate and phosphate from wastewater by an amine-grafted adsorbent for cyanobacterial biomass production.
abstract: Various types of wastewater have been widely utilized in microalgae and cyanobacteria cultivation for environmental and economic reasons. However, the problems of low cell growth and biomass contamination due to direct use of wastewater remain unresolved. In the present study, nitrate and phosphate were separated from wastewater by adsorption and subsequently used for cyanobacterial biomass production. To this end, an amine-grafted magnetic absorbent was synthesized. The synthesized absorbent recovered ca. 78% nitrate and 93% phosphate from wastewater. Regenerated medium was prepared using recovered nutrients as nitrogen and phosphate sources, which were efficiently assimilated by cyanobacterial culture. Compared to synthetic medium, there was no difference in growth and nutrient removal using regenerated medium. The proposed indirect method of wastewater utilization would prevent contamination of the produced biomass by unfavorable substances, which will broaden its potential applications.
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea; Human and Environmental Toxicology Program, Korea University of Science and Technology, Daejoen 34113, Republic of Korea.
authors.forename: Jungmin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea.
authors.forename: Min-Jin
authors.initials: MJ
authors.lastname: Hwang
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea.
authors.forename: Sang-Jun
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea.
authors.forename: Won
authors.initials: W
authors.lastname: Noh
authors.affiliation: HK Biotech. Co., Ltd, Jinju 52840, Republic of Korea.
authors.forename: Jung Min
authors.initials: JM
authors.lastname: Kwon
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea.
authors.forename: Jin Soo
authors.initials: JS
authors.lastname: Choi
authors.affiliation: Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Republic of Korea. Electronic address: cmkang@kitox.re.kr.
authors.forename: Chang-Min
authors.initials: CM
authors.lastname: Kang
mesh_terms: D000327:Adsorption; D000588:Amines; D000818:Animals; D018533:Biomass; D002460:Cell Line; D008264:Macrophages / Q000187:drug effects; D051379:Mice; D009566:Nitrates / Q000302:isolation & purification* / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010710:Phosphates / Q000302:isolation & purification* / Q000378:metabolism; D053545:Spirulina / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry* / Q000633:toxicity
chemical_list: D000588:Amines; D009566:Nitrates; D009584:Nitrogen; D010710:Phosphates; D062065:Wastewater
keywords: Adsorption; Nitrate; Phosphate; Spirulina maxima; Wastewater