The pretreated corncob was modified by H3BO3-low temperature carbonization.The adsorption behavior of modified corncob for Cu2+ and its desorption and regeneration ability were studied.The internal structure and composition of modified corncob were detected by SEM,EDS and FT-IR.The effects of dosage,PH,adsorption time,experimental temperature on adsorption performance were discussed.The results showed that when the initial concentration of Cu2+ was 30mg/L,the dosage of corncob was 3g/L,the pH was 6～7 and the temperature was 30℃,the adsorption equilibrium of modified corncob for Cu2+ reached at 120min,and the adsorption rate reached 93.8%.Under the assistance of ultrasonic wave,the saturated modified corncob was regenerated with 0.1mol/L HCl solution,and could be recycled for more than four times.
Jia Qihua, Zhang Xuebin
. Adsorption of Cu2+ by corncob modified with H3BO3 by low temperature carbonization[J]. New Chemical Materials, 2020
, 48(11)
: 252
-255
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.11.056
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