摘要
通过HNO_3–NaOH对煤质活性炭进行改性,采用扫面电镜(SEM)和Boehm滴定法对改性前后的活性炭进行表征,并研究活性炭用量、吸附时间及Ni~(2+)浓度对活性炭吸附Ni~(2+)性能的影响。结果表明:同等条件下,改性活性炭对Ni~(2+)的吸附量更高。在Ni~(2+)浓度为0.4 mg/L,温度30℃时,改性活性炭的最佳投加量为5.0 g/L,反应1 h后Ni~(2+)的去除率可达98.88%。
The wood activated carbon(W-AC)was modified by HNO_3–NaOH and characterized by Scanning electron microscopeand Boehm titration.The effect of amount of AC,adsorption time and the Ni~(2+)concentrationon the adsorption properties of Ni~(2+)were investigated.The adsorption capacity was higher under the same conditions after modification.With the Ni~(2+)concentration 0.4 mg/L,the optimum addition of modified W-AC was 5.0 g/L and the removal efficiency after reaction for 1 h was 98.88%.
引文
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