| 傅瑞琪,刘榆,楼子墨,孙悦,周晓馨,王卓行,徐新华.氨基改性猪热解炭化物及对水中微量Cu(Ⅱ)和Cu(Ⅱ)-Cit的去除研究[J].农业环境科学学报,2016,35(10):1998-2004. |
| 氨基改性猪热解炭化物及对水中微量Cu(Ⅱ)和Cu(Ⅱ)-Cit的去除研究 |
| Aminized pig biochar and its removals of trace Cu(Ⅱ) and Cu(Ⅱ)-Cit from aqueous solution |
| 投稿时间：2016-03-30 |
| DOI：10.11654/jaes.2016-0428 |
| 中文关键词: 吸附 氨基功能化 猪热解炭化物 Cu(Ⅱ) Cu(Ⅱ)-Cit 络合 |
| 英文关键词: adsorption amine group pig carbonization material Cu(Ⅱ) Cu(Ⅱ)-Cit complexation |
| 基金项目:国家水体污染控制与治理科技重大专项（2014ZX07101-012-04） |
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| 摘要点击次数: 2012 |
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| 中文摘要: |
| 采用一步合成法制备氨基功能化改性猪热解炭化物（PCM@SiO2-NH2）来去除水中微量离子态铜和络合态铜。通过SEM、EDX、FTIR、XPS等分析手段对改性前后猪热解炭化物复合材料进行表征，了解其形貌、结构、化学组成等，考察其对水中微量Cu（Ⅱ）和柠檬酸铜（Cu（Ⅱ）-Cit）的吸附去除能力以及去除效果的影响因素，深入探讨其对Cu（Ⅱ）和Cu（Ⅱ）-Cit的吸附去除机理。结果表明，PCM@SiO2-NH2对水体中微量Cu（Ⅱ）和Cu（Ⅱ）-Cit的去除有促进作用，去除效率随着复合材料投加量的增加而增大；吸附材料对Cu（Ⅱ）和Cu（Ⅱ）-Cit的最大吸附容量分别为25.3 mg·g-1和5.6 mg·g-1，吸附过程符合Langmuir模型；溶液pH值对材料吸附去除Cu（Ⅱ）和Cu（Ⅱ）-Cit均有显著的影响，两重金属溶液最佳初始pH为6.0。PCM@SiO2-NH2对Cu（Ⅱ）和Cu（Ⅱ）-Cit的去除机理主要包括络合反应、静电吸附以及离子交换，FTIR和XPS分析结果显示，吸附过程中-NH2基团和重金属之间的络合吸附占主导作用。 |
| 英文摘要: |
| Aminized pig biochar(PCM@SiO2-NH2) was prepared via a co-condensation process to enhance its removals of trace Cu(Ⅱ) and Cu(Ⅱ)-Cit from aqueous solutions. SEM, EDX, FTIR and XPS were employed to investigate the morphological, structural and chemical composition of modified/unmodified pig biochar. The adsorption performance and influencing factors of PCM@SiO2-NH2 for Cu(Ⅱ) and Cu(Ⅱ)-Cit adsorption were studied. The possible adsorption mechanisms of Cu(Ⅱ) and Cu(Ⅱ)-Cit on PCM@SiO2-NH2 were extensively analyzed. High removal efficiencies of Cu(Ⅱ) and Cu(Ⅱ)-Cit by PCM@SiO2-NH2 were found. Moreover, higher removal efficiencies were achieved by increasing amount of adsorbent. PCM@SiO2-NH2 showed the maximum adsorption capacity of 25.3 mg·g-1 and 5.6 mg·g-1 for Cu(Ⅱ) and Cu(Ⅱ)-Cit, respectively. The adsorption data of Cu(Ⅱ) and Cu(Ⅱ)-Cit were fitted well to the Langmuir isotherm model. Solution pH was one of the most important factors influencing adsorption process. The optimum initial pH was 6.0. The adsorption mechanism of Cu(Ⅱ) and Cu(Ⅱ)-Cit included complexation adsorption, electrostatic attraction and ion-exchange. Complexation adsorption mechanism was prominent in Cu(Ⅱ)/Cu(Ⅱ)-Cit adsorption on PCM@SiO2-NH2 under the presence of amino groups. |
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