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花生壳活性炭对反渗透(RO)浓水的吸附特性 被引量：5

Adsorption mechanism of RO concentrate by peanut shell activated carbon
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摘要 以花生壳活性炭对RO浓水进行吸附处理,利用傅立叶红外光谱(FTIR)和荧光光谱(EEM)研究花生壳活性炭对不同pH的RO浓水的吸附特性.结果表明,花生壳活性炭对溶解性有机碳(DOC)的吸附遵循准二级吸附动力学方程,特别是碱性条件下,DOC的吸附量随着pH的升高而降低.而且pH越高,达到吸附平衡的时间越长.通过FTIR光谱分析发现,活性炭的芳香结构吸收峰在吸附后红移至1630 cm-1,表明被吸附的有机物在该处有明显的特征吸收峰,而C—O和O—H官能团的吸收峰则因为钙离子等物质的吸附而显著降低.由EEM光谱分析可知,RO浓水的荧光物质主要由腐殖酸类腐殖质和富里酸类腐殖质组成,其荧光强度与DOC之间具有较好的线性相关性. A large amount of RO concentrates is produced in the reclamation ot petmclaemlcal wastewater, wnlcn discharges organics that might induce notable ecotoxicological effects. The adsorption of RO concentrate by peanut shell activated carbon was systematically investigated in the study. Fourier transform infrared spectroscopy （VFIR） and fluorescence spectroscopy （EEM） were emplgyed to explore the adsorption mechanism of RO concentrates with different pH values. Results showed that the kinetic process for DOC adsorption was described by a pseudo-second-order kinetic model. When pH was increased, the adsorption of DOC generally decreased, especially in the alkaline conditions. And a longer time was needed to reach the equilibrium. FTIR analysis indicated that the aromatic absorption band for activated carbon was red-shifted to 1630 cm-1 after adsorption, which implies the adsorption of DOC from RO concentrate. The C-O and O-H groups were involved in the complexation with calcium ions in RO concentrate. EEM analysis showed that the fluorescent substances were mainly humic-like and fulvic-like, and their fluorescence intensity exhibited a significant linear relationship with DOC during the adsorption of RO concentrates.
作者 刘光全 隋建红 张华 吴百春 李英芝
机构地区 中国石油集团安全环保技术研究院环保技术研究所 山东省煤田地质规划勘察研究院 中国石油大学(北京)
出处 《环境化学》 CAS CSCD 北大核心 2012年第6期862-868,共7页 Environmental Chemistry
基金 国家水体污染控制与治理科技重大专项资助(2013ZX07512)资助
关键词 DOC 傅立叶红外光谱 荧光光谱 花生壳活性炭 RO浓水 DOC, fourier transform infrared spectroscopy, fluorescence spectroscopy, peanut shellactivated carbon, RO concentrate.
分类号 X703 [环境科学与工程—环境工程]
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参考文献19

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共引文献41

同被引文献49

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  • 2范冬琪,魏健,宋永会,曾萍,崔晓宇,徐东耀.Fered-Fenton法处理石化废水反渗透浓水[J].环境工程学报,2015,9(6):2653-2659. 被引量：9
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引证文献5

二级引证文献10

环境化学
2012年 第6期

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