小麦秸秆生物炭对小白菜中铅累积含量的影响

考察了240℃热解小麦秸秆制备的生物炭对铅离子的吸附性能及对土壤中铅离子的固定效应。结果表明,小麦秸秆生物炭对铅离子以化学吸附为主要过程,298.15K和323.15K下的平衡吸附量分别为45.02 mg/g和51.05 mg/g；通过小白菜种植实验,生物炭在土壤中添加量大于1%时,小白菜含铅量小于0.082mg/kg,且小白菜中铅含量随着生物炭用量的增加而减少,为解决铅离子污染的土壤问题提供了基础数据。

Effect of Wheat Straw Biochar on Lead Accumulation in Cabbage Organization

The adsorption properties of biochar prepared by pyrolysis of wheat straw at 240 °C on lead ions and the immobilization effect on lead ions in soil were investigated. The results showed that the chemical adsorption of lead ions by wheat straw. was the main process. The equilibrium adsorption capacities at 298.15K and 323.15K were 45.02 mg/g and 51.05 mg/g, respectively. The biochar was in the soil through the experiment of Chinese cabbage cultivation. When the addition amount is more than 1%, the lead content of Chinese cabbage is less than 0.082mg/kg, and the lead content in Chinese cabbage decreases with the increase of biochar consumption, which provides basic data for solving the soil problem of lead ion pollution.