title: Eco-physiological characteristics of Pistia stratiotes and its removal of pollutants from livestock wastewater.
abstract: The effectiveness of water lettuce in removing pollutants including organic pollutants, nitrogen (NH3-N) and total phosphorus (TP) from livestock wastewater along with the physiological effects and their correlations, was studied for the first time. The results showed that the water lettuce had higher removal efficiency with low concentrations of livestock wastewater. The removal efficiency of water lettuce for different initial concentrations of livestock wastewater within 8 d was as follows: chemical oxygen demand (CODcr) (68-82%) > NH3-N (57-69%) >TP (27-45%). The speed of purification of water lettuce for CODcr, NH3-N and TP conformed to first order kinetics equations. The water quality indices CODcr, NH3-N and TP had a higher linear correlation with peroxidase (POD) activity (R(2) > 0.9(2)) than with superoxide dismutase (SOD) and catalase (CAT) activity, which indicates that the main reacting enzyme of water lettuce under high CODcr stress is peroxidase.
authors: Department of Engineering Technology, Xichang College, Sichuan 615000, China E-mail: chenjinfa11@sohu.com.
authors: Jinfa
authors: J
authors: Chen
authors: Department of Engineering Technology, Xichang College, Sichuan 615000, China E-mail: chenjinfa11@sohu.com.
authors: Qishan
authors: Q
authors: Nie
authors: School of Life Science, Sichuan Normal University, Sichuan 610101, China.
authors: Yun
authors: Y
authors: Zhang
authors: Department of Engineering Technology, Xichang College, Sichuan 615000, China E-mail: chenjinfa11@sohu.com.
authors: Jinzhao
authors: J
authors: Hu
authors: Department of Engineering Technology, Xichang College, Sichuan 615000, China E-mail: chenjinfa11@sohu.com.
authors: Lin
authors: L
authors: Qing
mesh_terms: D000641:Ammonia / Q000737:chemistry; D000818:Animals; D029064:Araceae / Q000378:metabolism*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D058751:Livestock; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D010710:Phosphates / Q000737:chemistry; D018515:Plant Leaves / Q000201:enzymology / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
chemical_list: D000641:Ammonia; D010100:Oxygen; D010710:Phosphates; D062065:Wastewater; D014874:Water Pollutants, Chemical