[Adsorption of cyromazine on five typical soils in China].
Batch equilibrium experiments were used to reveal cyromazine adsorption on five kinds of soils, namely Ali-Perudic Ferrosols collected from Yingtan of Jiangxi, Udic Argosols collected from Nanjing and Gleyic-Stagnic Anthrosols collected from Changshu of Jiangsu, Ustic Cambosols collected from Fengqiu of Henan, and Udic Isohumosols collected from Hailun of Heilongjiang. Results show that the experimental data are best described by the Freundlich and Langmuir model, while fitted successfully by the linear model. Different adsorption behaviors of Cyromazine are observed in the five tested soils, with the lgK(f) values varying from 1.6505 (cambosols), 1.6715 (argosols) and 1.7153 (ferrosols) to 2.4579 (anthrosols) and 2.6557 (isohumosols). Moreover, the Kf values are in a positive correlation to the OM of the soil (r = 0.989) but significantly negative correlated to soil pH (r = -0.938). The free energy of sorption ranged from -20.8 to -23.0 kJ/mol, indicated that the adsorption could be largely attributed to the physical adsorption.
Tang
Ling-li
LL
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Wang
Hui
H
Dong
Yuan-hua
YH
Liu
De-hui
DH
Zhao
Ling
L
Zhang
Jing-qiang
JQ
Liu
Xing-cheng
XC
An
Qiong
Q
D000327:Adsorption; D002681:China; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000737:chemistry / Q000302:isolation & purification; D014227:Triazines / Q000737:chemistry / Q000302:isolation & purification*
D012987:Soil; D012989:Soil Pollutants; D014227:Triazines; C028704:cyromazine