炭醋肥对Cd^(2+)、Pb^(2+)吸附、解吸附的影响研究

Effects of Chemical Fertilizer with Biochar and Pyroligneous Acid on Adsorption and Desorption of Cd^(2+)、Pb^(2+) of Soil

将生物炭、木醋液和矿物养分混合为炭醋肥,在实验室条件下将炭醋肥、有机无机复混肥、烟草专用肥与土壤混合后,比较了三者对Cd^(2+)、Pb^(2+)的吸附作用及解吸行为。研究结果表明:与其他两种肥料相比,炭醋肥使土壤吸附和固定重金属Cd^(2+)、Pb^(2+)能力增强,Cd^(2+)的吸附和固定能力最高可分别提高33.33%、16.56%,Pb^(2+)吸附和固定能力最高可分别提高45.56%、54.59%;其吸附性与pH值呈正相关关系,且随着添加量的增大而增强。

In this paper, biochar, pyroligneous acidand mineral nutrients were mixed into chemical fertilizer with bio- char and pyroligneous acid. The adsorption and desorption of Cd2＋ and Pb2＋ were compared after the mixture of carbon and organic fertilizer, organic and inorganic compound fertilizer, tobacco special fertilizer and soil. The results showed that the adsorption and immobilization capacity of Cd2＋ and Pb2＋ could be increased by 33.33% and 16. 56% respectively, and the adsorption and fixation ability of Pb2＋ could be higher than that of the other two fertilizers in- creased by 45. 56%, 54. 59%. The adsorption was positively correlated with pH. It increased with the increase of the addition amount.