| 高锰酸钾改性活性炭的表征及其吸附Cu2+的性能 |
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| 引用本文： | 丁春生,邹邦文,缪佳,诸钱芬.高锰酸钾改性活性炭的表征及其吸附Cu2+的性能[J].中南大学学报(自然科学版),2012,43(5):2016-2022. |
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| 作者姓名： | 丁春生 邹邦文 缪佳 诸钱芬 |
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| 作者单位： | 浙江工业大学建筑工程学院,浙江杭州,310012 |
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| 基金项目： | 浙江省自然科学基金资助项目 |
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| 摘 要： | 为提高活性炭对废水中Cu2+的去除效率,用不同浓度的KMnO4溶液,采用静置氧化/冷凝回流法对颗粒活性炭进行改性。采用BET,SEM,FT-IR和XRD等方法对改性活性炭的理化性质进行表征;探讨改性活性炭投加量、pH、吸附时间、温度对吸附Cu2+的影响。研究结果表明:当Cu2+质量浓度为20 mg/L,投加量为5 g/L时,0.01KMnO4-GAC和0.03KMnO4-GAC对Cu2+的吸附去除率分别达到84%和95%,分别是GAC的1.20和1.36倍;吸附剂在5 g/L投加量时,180 min基本达到吸附平衡;3种吸附剂对Cu2+的吸附,随着pH的降低而减少;温度对活性炭吸附Cu2+的影响相对较小。
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| 关 键 词： | 活性炭 改性 高锰酸钾 吸附 Cu2+ |
Characterization and Cu2+ adsorption capability of activated carbon modified by KMnO4 |
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| DING Chun-sheng
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ZOU Bang-wen
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MIAO Jia
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ZHU Qian-fen.Characterization and Cu2+ adsorption capability of activated carbon modified by KMnO4[J].Journal of Central South University:Science and Technology,2012,43(5):2016-2022. |
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| Authors: | DING Chun-sheng ZOU Bang-wen MIAO Jia ZHU Qian-fen |
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| Institution: | (College of Architecture and Civil Engineering,Zhejiang University of Technology,Hangzhou 310012,China) |
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| Abstract: | The granular activated carbon(GAC) was modified by standing oxidation/reflux condensation method using KMnO4 solution with different concentrations in order to improve the adsorption efficiency of Cu2+ in wastewater.The surface characterization of modified GAC was conducted by the BET,SEM,FT-IR and XRD methods.The effects of modified GAC dosage,pH,adsorption time and temperature on Cu2+ adsorption efficiency were also studied.The results indicate that when the original Cu2+ concentration is 20 mg/L and GAC dosage is 5 g/L,the adsorption removal rates by 0.01KMnO4-GAC and 0.03KMnO4-GAC reach 84% and 95%,respectively,1.20 and 1.36 times higher than that only by GAC.It is also found that the adsorption of Cu2+ is not saturated until 180min under the same condition.And Cu2+ adsorption capability by the three absorbents all decreases with the decrease of pH and the influence of temperature on Cu2+ adsorption is negligible. |
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| Keywords: | activated carbon modification KMnO4 adsorption Cu2+ |
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