| 赵庆,张瑾,胡振东,杨英.稻壳炭对Pb2+吸附效果影响因素研究[J].安徽建筑大学学报,2016,24(1):53-58 |
| 稻壳炭对Pb2+吸附效果影响因素研究 |
| Study on the Impacts of Rice Husk Carbon on the Adsorption of Pb2+ |
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| DOI：10.11921/j.issn.2095-8382.20160112 |
| 中文关键词: 稻壳活性炭 Pb2+ 吸附量 |
| 英文关键词: Rice husk activated carbon Pb2+ adsorption capacity. |
| 基金项目:国家自然科学基金(面上项目NO: 41471422),新兴有机物污染物控制北京市重点实验室开放基金资助,安徽建筑大学博士科研启动基金,安徽省卓越人才教育培养计划项目 (2014zjjh027). |
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| 中文摘要: |
| 稻壳炭对重金属Pb2+的吸附量受吸附时间、吸附剂投加量、温度、pH、稻壳炭理化性质等因素影响。实验通过单因素分析法研究了上述各影响因素对吸附效果的影响，并设计正交试验探讨了常温下稻壳炭吸附Pb2+的最佳吸附条件，采用扫描电镜（SEM）对吸附前后稻壳炭样品进行了表征分析。实验发现：吸附过程前30 min为快速吸附阶段，60 min后吸附过程基本完成，120 min后吸附量达到最大值；相同浓度条件下，稻壳炭对Pb2+的吸附量存在一个最佳投加量；温度方面20 ℃时对吸附较为有利，温度高于25 ℃或低于15 ℃时不利于吸附； pH对吸附效果影响较大，pH 5-7条件下对吸附最为有利，过酸过碱均不利于吸附进行；对稻壳炭进行活化改性是提高其吸附能力的一种有效途径。 |
| 英文摘要: |
| Adsorption amount of rice husk carbon on heavy metal Pb2+ is affected by the adsorption time, the amount of adsorbent, temperature, pH and physicochemical properties of rice husk char. The influence of the factors on the adsorption effect was studied by single factor analysis, and the optimum adsorption conditions of the rice husk carbon on Pb2+ at room temperature was studied by orthogonal test; the rice husk char samples before and after adsorbing were characterized by scanning electron microscopy (SEM). The result showed that the adsorption was the fastest at the first 30min, and adsorption process finished after 60min and at 120min,the adsorption capacity reached the maximum; under the same concentration, the adsorption of rice husk carbon on Pb2+ had a best dosage; adsorption was better at 20 ℃and it was not conducive to the adsorption when the temperature was higher than 25 ℃ or less than 15 ℃; pH had a greater impact on the adsorption effect; the best pH value was 5-7, and pH value under strong acid or alkali were not conducive to the adsorption.; activating and modifying rice husk was an effective way to improve the adsorption capacity. |
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