Research Article

Adsorption of Arsenite by Six Submerged Plants from Nansi Lake, China

Table 1

Isotherm parameters for Langmuir, Freundlich, and Dubinin-Radushkevich models for As (III) adsorption at 13°C.

PlantsFreundlich modelLangmuir modelDubinin-Radushkevich model
(mg/kg) (L/mg)mg/kgL/mgmol2/kJ2mg/kgkJ/mol

Mimulicalyx rosulatus 7.600.700.973.0910.920.820.0295.524.120.85
Potamogeton maackianus 10.410.580.996.938.950.980.0248.184.530.95
Hydrilla 8.780.590.9218.081.910.890.0287.974.230.93
Watermifoil 4.121.150.98−0.83−2.350.920.0583.382.950.93
Pteris vittata 24.990.880.956.64−3.490.910.04422.683.370.93
Potamogeton crispus 39.880.990.99−3.65−3.590.950.05523.393.020.98