菜园土壤铜吸附--解吸特性的研究

研究了菜园土壤铜的吸附—解吸特性。结果表明 ,3种菜园土壤吸附 Cu2 的量均随平衡液中Cu2 浓度的增加而增大 ,可用 L angmuir方程和 Freundlich方程来描述。由 Langmuir方程求得的菜园土壤对 Cu2 的最大吸附量和最大缓冲容量的大小顺序为 :黄松土 >江涂土 >粉泥土 ,菜园土壤对 Cu2 的解吸量和解吸率均随其吸附量的增加而增加 ,吸附量与解吸量之间呈显著或极显著线性正相关。

Characteristics of Cu Adsorption/Desorption of Vegetable Garden Soils

An experiment was carried out to study Cu adsorption/desorption of three vegetable garden soils with results showing that Cu\ \{2 \} adsorption increased with Cu\ \{2 \} concentration in the equilibrium solutions of the three soils. This fitted quite well with both Langmuir equation and Freundlich equation. The maximum Cu\ \{2 \} adsorption and maximum buffering capacity of the soils obtained from Langmuir equation was in such a decreasing order as Fluvio marine yellow loamy soil (Huang Song Tu)>Fluvio marine polder soil (Jiang Tu Tu)>Aquic silt loamy soil (Fen Ni Tu). Cu\ \{2 \} desorption and Cu\ \{2 \} desorption rate of the soils increased with Cu\ \{2 \} adsorption of the soils. Significant or extremely significant positive linear relationship was observed between their adsorption and desorption.