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石油焦基高比表面积活性炭对废水中CODCr的吸附能力
引用本文:孙敏,彭凤仙,邓益群. 石油焦基高比表面积活性炭对废水中CODCr的吸附能力[J]. 生态科学, 2005, 24(2): 146-149
作者姓名:孙敏  彭凤仙  邓益群
作者单位:长沙环境保护职业技术学院, 湖南, 长沙, 410004
摘    要:探讨了高比表面积活性炭(HSAAC)吸附水中CODCr时,活性炭用量、pH值和吸附时间等因素对CODCr吸附量和去除率的影响。实验结果表明,HSAAC用量越大,去除CODCr效果越好。当HSAAC用量为2.0g·L-1,pH=3时,去除率达到78%以上;在酸性条件下HSAAC对CODCr的去除效果较好;HSAAC对废水中CODCr的吸附发生在前30min;CODCr浓度低于60mg·L-1时,处理后CODCr的残余质量浓度低于地表水环境质量Ⅰ类标准(15mg·L-1)。用碱再生HSAAC,一次再生率达94.22%,二次再生率达到了86.90%。说明高比表面积活性炭在适宜条件下对CODCr具有较好的吸附性能和良好的再生效果。

关 键 词:高比表面积活性炭  CODCr  
文章编号:1008-8873(2005)02-146-04
收稿时间:2005-04-25
修稿时间:2005-01-24

Study of the adsorption performance of high-specific area activated carbon to CODcr in aqueous solution
SUN Min,PENG Feng-xian,DENG Yi-qun. Study of the adsorption performance of high-specific area activated carbon to CODcr in aqueous solution[J]. Ecologic Science, 2005, 24(2): 146-149
Authors:SUN Min  PENG Feng-xian  DENG Yi-qun
Abstract:The paper discussed the effects of the dosage of activated carbon, pH value, the adsorption time and other factors on the adsorption capacity of CODCr and the removal rate when using high-specific area activated carbon to adsorb CODCr in wastewater. The result showed the dosage of HSAAC has a positive relationship with effect of the removal rate of CODCr. When the dosage of HSAAC was 2.0 g·L-1 and pH was 3, the removal rate was above 80%. Under the acidity condition, the treatment showed a better effect. CODCr in wastewater adsorbed by HSAAC mainly took place during the first 30 minutes. When the concentration of CODCr in wastewater was lower than 60 mg·L-1, after the treatment, the residual quality concentration of CODCr adsorption performance was lower than the First Class of the National Standard of the Surface Water of Environmental Quality(15mg·L-1). When HSAAC was regenerated with alkali, the regenerated rate for the first time was 94.22%, and for the second time was 86.9%. Overall, the high-specific surface area activated carbon has excellent adsorption performance and can easily be regenerated under the suitable conditions.
Keywords:High-specific surface area activated carbon  COD_(Cr)  Adsorption performance
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