| NaOH改性粉煤灰对废水中Pb2+的吸附特性研究 |
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| 引用本文： | 于丽园,卢仪思,董晓强,李玉屏. NaOH改性粉煤灰对废水中Pb2+的吸附特性研究[J]. 非金属矿, 2021, 0(2): 80-83 |
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| 作者姓名： | 于丽园 卢仪思 董晓强 李玉屏 |
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| 作者单位： | 太原理工大学土木工程学院;山西建设投资集团有限公司 |
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| 基金项目： | 国家自然科学基金(51978438);2020年山西省研究生教育创新项目(2020BY123)。 |
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| 摘 要： | 采用批吸附试验探究NaOH改性粉煤灰对含Pb2+废水吸附特性。结果表明,NaOH改性粉煤灰对Pb2+具有较强的吸附效果,在固液比为0.9 g/L、温度为25℃、Pb2+溶液质量浓度为100 mg/L条件下,吸附反应在30 min基本达到平衡,Pb2+去除率为96.02%,吸附容量为106.69 mg/g。由吸附等温线模型得出吸附主要在单分子层表面进行。吸附动力学特征表明吸附主要限速步骤为化学吸附。吸附反应存在物理吸附和化学吸附。
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| 关 键 词： | 含Pb2+废水 粉煤灰 NaOH改性 吸附 |
Adsorption Behaviors of Pb2+in Wastewater by NaOH Modified Fly Ash |
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| Yu Liyuan,Lu Yisi,Dong Xiaoqiang,Li Yuping. Adsorption Behaviors of Pb2+in Wastewater by NaOH Modified Fly Ash[J]. Non-metallic Mines, 2021, 0(2): 80-83 |
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| Authors: | Yu Liyuan Lu Yisi Dong Xiaoqiang Li Yuping |
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| Affiliation: | (College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024;Shanxi Construction Investment Group Co.,Ltd.,Taiyuan,Shanxi 030024) |
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| Abstract: | In this paper,batch adsorption experiments were used to explore the adsorption characteristics of NaOH modified fly ash on Pb2+containing wastewater.The results show that NaOH modified fly ash has a strong adsorption effect on Pb2+.Under the conditions of the solid-liquid ratio of 0.9 g/L,the temperature of 25℃and Pb2+solution concentration of 100 mg/L,the adsorption reaction basically reached equilibrium in 30 min,the removal rate of Pb2+reached 96.02%,and the adsorption capacity reached 106.69 mg/g.The adsorption isotherm model showed that the adsorption mainly took place on the surface of the monolayer.The adsorption kinetics showed that the main rate-limiting step was chemical adsorption.There were both physical adsorption and chemical adsorption in the adsorption reaction. |
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| Keywords: | Pb2+wastewater fly ash NaOH modification adsorption |
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