title: Importance of controlling pH-depended dissolved inorganic carbon to prevent algal bloom outbreaks.
abstract: This study investigated effects of pH-depended inorganic carbon (IC) species and pH on algal growth in the sewage simulation system, and fruitfully discussed the relationships among IC, pH and algal growth by the Monod kinetics. Results showed HCO3(-) significantly increased algal growth by 3.17-6.52 times than that of CO3(2-) and/or glucose when the value of pH was in the range of 8.0-9.5, and also the preferentially utilized indicated by the affinity coefficient (Kp) of HCO3(-), CO3(2-) and glucose (0.17, 15.14 and 31.22, respectively). Meanwhile, the same pH range facilitated HCO3(-) to become a dominated species (e.g., 48.80-93.19% of total IC). More importantly, good linear correlations pairwise existed among pH, IC species and algae growth. These results suggested pH plays a critical role in regulation of IC species and algae growth, which would be an efficient method to control the IC discharge from sewage effluents and weaken bloom outbreak.
authors: Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, PR China.
authors: Na
authors: N
authors: Liu
authors: College of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China.
authors: Yixuan
authors: Y
authors: Yang
authors: Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, PR China.
authors: Feng
authors: F
authors: Li
authors: Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, PR China. Electronic address: gefei@xtu.edu.cn.
authors: Fei
authors: F
authors: Ge
authors: Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, PR China.
authors: Yangduo
authors: Y
authors: Kuang
mesh_terms: D002244:Carbon / Q000378:metabolism*; D002708:Chlorella / Q000254:growth & development* / Q000378:metabolism*; D005068:Eutrophication; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D012722:Sewage
chemical_list: D012722:Sewage; D002244:Carbon
keywords: Algae; Inorganic carbon; Monod kinetics; pH