| 活性炭表面改性及其对磷(V)吸附性能的研究 |
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| 引用本文： | 李山,李景哲. 活性炭表面改性及其对磷(V)吸附性能的研究[J]. 环境科学与技术, 2011, 34(12): 79-82,94. DOI: 10.3969/j.issn.1003-6504.2011.12.017 |
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| 作者姓名： | 李山 李景哲 |
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| 作者单位： | 长安大学环境科学与工程学院,陕西西安,710054 |
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| 摘 要： | 以硝酸、氢氧化钠、氯化铁、海藻酸钠(SA)为改性剂,采用浸渍法制备了六种改性粉末活性炭,研究其对磷(V)的吸附性能。结果表明,以FeCl3直接改性和NaOH/FeCl3复合改性的粉末炭(分别标记为PAC-3和PAC-6)对磷(V)的吸附能力最强,在室温下,处理质量浓度为30 mg/L的磷(V)溶液25 mL,pH为5.0,PAC-3用量为0.4 g,吸附90 min,吸附率可达99%,吸附后的PAC-3可用0.1 mol/LNaOH溶液洗脱再生。共存物质中,NaNO3没有影响,Na2SO4抑制作用不大,Na2CO3和C(rⅥ)有增强作用,其中C(rⅥ)的增强作用显著。吸附机制是静电吸引、离子交换和络合反应共同起作用,以络合反应为主。
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| 关 键 词： | 粉末活性炭(PAC) 表面改性 磷(V) 吸附 机制 |
Surface Modification of Activated Carbon and Its Adsorption for Phosphate |
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| LI Shan,LI Jing-zhe. Surface Modification of Activated Carbon and Its Adsorption for Phosphate[J]. Environmental Science and Technology, 2011, 34(12): 79-82,94. DOI: 10.3969/j.issn.1003-6504.2011.12.017 |
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| Authors: | LI Shan LI Jing-zhe |
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| Affiliation: | (School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China) |
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| Abstract: | Six modified powder activated carbon(PAC) were prepared by chemical immersion method using nitric acid,sodium hydrate,ferric trichloride and sodium alginate as modifiers,and their adsorption for phosphates were studied.Results showed that the adsorption capacity of activated carbon which modified with ferric trichloride or modified with both sodium hydrate and ferric trichloride(referred to as PAC-3and PAC-6) were the highest.At room temperature,25 mL phosphate solution of 30 mg/L and pH 5.0 was treated wit... |
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| Keywords: | powder activated carbon(PAC) surface modification phosphate adsorption mechanism |
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