Adsorption of Bivalent Copper Ions in Water by Modified Peanut Shell
In this paper,agricultural waste peanut shells were used as a raw materials,modified by H2O2,and the modified peanut shell was used as adsorption material to study the adsorption performance of Cu2+.Through electron microscope scanning,it was found that the surface structure of the modified peanut shell was changed,and the adsorption capacity of Cu2+was enhanced.At 575 nm wavelength,the absorbance of a series of Cu2+standard solutions with different concentrations was measured by ultraviolet spectrophotometry,and the Cu2+standard curve was drawn.The adsorption effects of modifier mass fraction,adsorbent amount,pH value,time,temperature and initial concentration on Cu2+were investigated by using control variable method.The optimum conditions were as follows:25%modifier,0.1g adsorbent,6 pH value of initial solution,100 min adsorption time,40℃adsorption temperature and 2 mg/L initial concentration.Under the optimum conditions,the removal rate of copper reached 87.7%.The findings provide a novel approach for the resource utilization of agricultural waste and effective technical support for the removal of copper ions.
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