烟草科技Issue(1)：1-7,7.DOI:10.16135/j.issn1002-0861.20160101
纳米碳对重金属镉和铜的吸附特性及对烟草吸收重金属的影响
Adsorption characteristics of nano-carbon on heavy metal cadmium and copper and its effects on tobacco absorption of the two heavy metals
摘要
Abstract
In order to clarify the adsorption characteristics of nano-carbon on heavy metals, the adsorption characteristics of nano-carbon on Cd and Cu were investigated in a liquid-liquid system. The effects of nano-carbon on the available Cd content in soil and the Cd absorption of tobacco cultured in soil were discussed. The results showed that the Cd and Cu isothermal adsorption curves of nano-carbon could be fitted by Freundlich and Langmuir equations. The Cd and Cu adsorption by nano-carbon agreed with a quasi-two stage kinetic equation, and its adsorption rate was fast. At the initial solution concentration of 2 000 mg/L, the Cd adsorption amount was more than 80% of the equilibrium adsorption amount after 10 min, while it only took 3 min to reach that level for Cu adsorption. With the rise of temperature, the adsorption amounts decreased, which indicated that the adsorption by nano-carbon was an exothermic reaction. With the increase of pH, the adsorption amount by nano-carbon raised. Under the condition of this experiment, both the available Cd content in soil and the Cd content in tobacco leaves decreased with the increase amount of nano-carbon, and the optimal nano-carbon addition rate was 4.0 gram/pot.关键词
烟草/纳米碳/镉/铜/吸附/温度/pHKey words
Tobacco/Nano-carbon/Cadmium/Copper/Adsorption/Temperature/pH分类
农业科技引用本文复制引用
李玉磊,梁太波,王宝林,杨健,尹启生,张艳玲,周汉平,张仕祥,王爱国..纳米碳对重金属镉和铜的吸附特性及对烟草吸收重金属的影响[J].烟草科技,2016,(1):1-7,7.基金项目
河南省重大科技攻关项目“纳米增效技术在烤烟优质高效生产中的应用研究”（102101110600）；国家科技支撑计划项目“沙化治理生态产业技术集成与示范”（2012BAC08B08）；中国烟草总公司郑州烟草研究院科技项目“纳米碳对烟草促生作用的机理研究”（112013CZ0580）。 （）
