Premium
Adsorption Characteristics of Phosphorus onto Soils from Water Level Fluctuation Zones of the Danjiangkou Reservoir
Author(s) -
Du Chao,
Ren Xianyou,
Zhang Liang,
Xu Meng,
Wang Xiaojun,
Zhuang Yanhua,
Du Yun
Publication year - 2016
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201500094
Subject(s) - soil water , adsorption , phosphorus , environmental science , environmental chemistry , water level , soil science , hydrology (agriculture) , environmental engineering , geology , chemistry , geotechnical engineering , geography , cartography , organic chemistry
A comparative study was conducted to investigate the adsorption characteristics of phosphorus (P) on two soil samples collected from a typical subtropical reservoir and to reveal the possible influence of alternating exposure and inundation on the P adsorption onto soil in a water level fluctuation zone. Short‐term batch experiments were performed, and characterization methods, such as scanning electron microscopy (SEM) and Fourier transform infrared (FT‐IR) spectroscopy, were also used. The P adsorption kinetics for both soils was best described by a pseudo‐second order model ( R 2 > 0.99). A modified Langmuir model described the P adsorption on both samples well, and low temperature increased the risk of releasing soil P into the overlying water. Low pH values were not conducive to the P adsorption process. It appeared that alternating exposure and inundation had no significant impact on the adsorption capacity of P onto soil from water level fluctuation zones in this research. pH, SEM, and FT‐IR analyses demonstrated that Fe, Al, and Ca contained in the clay minerals of the soil played an important role in the adsorption of P onto soil from water level fluctuation zone.