The behavior of organic phosphorus under non-point source wastewater in the presence of phototrophic periphyton.
To understand the role of ubiquitous phototrophic periphyton in aquatic ecosystem on the biogeochemical cycling of organic phosphorus, the conversion and removal kinetic characteristics of organic phosphorus (Porg) such as adenosine triphosphate (ATP) were investigated in the presence of the periphyton cultured in artificial non-point source wastewater. The preliminary results showed that the periphyton was very powerful in converting Porg evidenced by the fact that inorganic phosphorus (Pinorg) content in solution increased from about 0.7 to 14.3 mg P L(-1) in 48 hours in the presence of 0.6 g L(-1) periphyton. This was because the periphyton could produce abundant phosphatases that benefited the conversion of Porg to Pinrog. Moreover, this conversion process was described more suitable by the pseudo-first-order kinetic model. The periphyton was also effective in removing Porg, which showed that the Porg can be completely removed even when the initial Porg concentration was as high as 13 mg P L(-1) in 48 hours in the presence of 1.6 g L(-1) periphyton. Furthermore, it was found that biosorption dominated the Porg removal process and exhibited the characteristics of physical adsorption. However, this biosorption process by the periphyton was significantly influenced by biomass (absorbent dosage) and temperature. This work provides insights into Porg biogeochemical circulation of aquatic ecosystem that contained the periphyton or similar microbial aggregates.
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, P. R. China.
Haiying
H
Lu
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, P. R. China ; Jiangsu Academy of Agriculture Sciences, Nanjing, P. R. China.
Linzhang
L
Yang
Centre for Clean Environment and Energy, Environmental Futures Centre, Griffith School of Environment, Gold Coast Campus, Griffith University, Queensland, Australia.
Shanqing
S
Zhang
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, P. R. China.
Yonghong
Y
Wu
D000327:Adsorption; D001673:Biodegradation, Environmental; D001711:Biotransformation; D002681:China; D017753:Ecosystem; D007700:Kinetics; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D010758:Phosphorus / Q000032:analysis* / Q000302:isolation & purification; D052817:Phototrophic Processes; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D010744:Phosphoric Monoester Hydrolases; D010758:Phosphorus; D062065:Wastewater; D014874:Water Pollutants, Chemical