中文摘要：

以棉花和花生秸秆为原料于500℃下限氧慢速热解制备得到两种生物质炭,通过批处理恒温振荡法,探讨了土壤施加不同种类生物质炭及冻融交替后吸附Cu（Ⅱ）的变化。结果表明,Freundlich和Langmuir等温模型均能较好地拟合各处理土壤对Cu（Ⅱ）的吸附,土壤施加棉花和花生秸秆炭后对Cu（Ⅱ）的吸附能力显著提高,吸附能力分别提高了3.8和17.9倍;冻融交替后施加棉花和花生秸秆炭的土壤对Cu（Ⅱ）的吸附能力均降低,吸附能力分别下降了1.6和1.1倍;花生秸秆炭比棉花秸秆炭更适宜作为土壤改良剂修复重金属污染土壤。

英文摘要：

Biochars derived from cotton straw and peanut straw were prepared by pyrolysis at 500%. A batch equilibration method was used to study the changes in the adsorption of Cu （Ⅱ） in soils after adding different kinds of biochar and freeze-thawing. The results showed that the adsorption of Cu （ Ⅱ） in soil was well-described by the Freundlich and Langmuir models. The adsorption abilities of Cu 17.9 times, respectively, after adding the cotton and peanut straw Ⅱ ） in soil were significantly increased by 3.8 and ochars. The adsorption abilities of Cu （Ⅱ） in soil with the addition of cotton and peanut straw biochars was decreased, respectively, by 1.6 and 1.1 times under freeze-thawing. Peanut straw biochar is more suitable to remediate the heavy metal contaminated soil than cotton biochar.