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以江西省2种典型水稻土(潜育型、潴育型)为试材,采用振荡平衡法研究了镉在水稻土中的吸附-解吸行为,并利用保留因子对镉在水稻土中的环境风险进行了评估。结果表明:潴育型水稻土的吸附能力较强,明显大于潜育型水稻土,但潴育型水稻土的解吸能力小于潜育型水稻土;2种水稻土对镉的吸附均可用Freundlich方程较好的拟合;镉的环境风险随镉含量的升高先减小后增大,且潜育型水稻土大于潴育型水稻土,但镉在2种水稻土中潜在环境风险均较大。
The adsorption-desorption behavior of cadmium in paddy soils was studied by oscillatory equilibrium method using two typical paddy soils (latent-type and reserve-type) in Jiangxi Province as experimental materials. The effect of cadmium on the environment of paddy soils Risk is assessed. The results showed that the adsorption capability of the paddy-paddy soil was stronger than that of the paddy soil, but the desorption capacity of the paddy-paddy soil was less than that of the paddy soil. The adsorption of cadmium on the two paddy soils can be calculated using the Freundlich equation Better fitting; the environmental risk of cadmium first decreased and then increased with the increase of cadmium content, and the latent-type paddy soil was more than the retention-type paddy soil, but the potential environmental risks of cadmium in both paddy soils were large .