Plant as the raw material to repair soil contaminated by heavy metal and prepared as biochar to removing the metal ions Cd from sewage by nightshade biochar adsorption.Subsequently,the particle size and adsorption condition for Cd2+ of nightshade biochar was analyzed.The study showed that sodium hydroxide was used to remove lipid activated by dilute nitric acid and calcining 1h at 550℃.The prepared nightshade biochar has a smaller size and more uniform particle size.The optimum adsorption condition of nightshade biochar on Cd2+ adsorption was pH 6 and biochar 0.1g,volume 40mL and the time of adsorption equilibrium 180mins.The adsorption process of Cd2+ on the surface of nightshade biochar was fit in Freundich and Langmuir isothermal adsorption models.
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基金资助
吉林化工学院重大科学技术研究项目(2016029);吉林市科技局科技发展计划项目(201750257);科技部、环保部项目“饮马河流域水污染综合治理与水质改善技术研究与综合示范”(2014ZX07201-011)
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