Acting as a raw material,mangosteen peel was subjected to decolorization with isopropanol and activation with alkaline reagent for preparing a kind of adsorbent,which was then used to adsorb copper ions in solution.The result from an adsorption experiment shows that increasing pH value can be beneficial to the adsorption of copper ions onto mangosteen peel,with the maximum adsorption capacity up to 1.5 molCu2+/kg.The adsorption can reach equilibrium within 30 min.The amount of loaded copper ions has a significant effect on the characteristic temperature of thermal decomposition of adsorbents during combustion.When the concentration of copper ions is lower than 2 mmol/L,there are higher number of loaded copper ions,and the temperature at which thermal decomposition begins and violent combustion decomposition ends becomes lower.When the concentration of copper ion is higher than 2 mmol/L,the characteristic value of thermal decomposition temperature no longer changes significantly.Copper ion plays a role of catalyst in the combustion process,which can effectively promote the combustion reaction.
关键词
生物质吸附剂/重金属废水处理/山竹皮/吸附铜/热分解温度/燃烧点/催化反应
Key words
biomass adsorbent/treatment of heavy metal wastewater/mangosteen peel/copper adsorption/thermal decomposition temperature/combustion point/rate catalytic reaction
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