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将廉价的生物质竹炭进行KI化学改性,在小型实验台架上研究了改性竹炭的的汞脱除性能,并对改性前后的样品进行了XPS表征和热分析以研究表面官能团在改性过程中的转化规律和脱汞机理。结果表明:碘化学改性竹炭具有超强的脱汞能力,改性后竹炭具有更多的利于脱汞的官能团,其主要靠化学吸附脱汞。

The low-cost bamboo charcoal was modified by KI and used for mercury removal on a bench-scale fixed-bed reactor. BET, XPS and thermal analysis were used to determine the pore structure and surface chemistry of the sorbents. The characterization of the physical and chemical properties of sorbents in relation to Hg0 adsorption capacity provided important information on the Hg0 adsorption mechanism. The experimental results implied that the modified BCs have excellent adsorption potential for elemental mercury. The modification has increased the sorbents' active sites for mercury adsorption and the chemisorption dominated mechanism has been further confirmed.

参考文献

[1] 吴昊,邱建荣,王泉海,刘豪.煤中汞在燃煤电站中的形态转化[J].电力环境保护,2003(01):29-31.
[2] 张鹏宇,曾汉才,张柳.活化处理的活性炭吸附汞的试验研究[J].电力科学与工程,2004(02):1-3.
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[5] Zhao RS;Wang X;Yuan JP;Lin JM .Investigation of feasibility of bamboo charcoal as solid-phase extraction adsorbent for the enrichment and determination of four phthalate esters in environmental water samples[J].Journal of chromatography, A: Including electrophoresis and other separation methods,2008(1/2):15-20.
[6] 王桂仙,张启伟.竹炭对水体中重金属离子的吸附规律研究[J].化学与生物工程,2008(03):66-68.
[7] 李松,曾林慧,Chen Yingxu.竹炭对饮用水中硝酸盐的吸附特性及影响因素研究[J].净水技术,2007(04):65-68.
[8] Zengqiang Tan;Lushi Sun;Jun Xiang .Gas-phase elemental mercury removal by novel carbon-based sorbents[J].Carbon: An International Journal Sponsored by the American Carbon Society,2012(2):362-371.
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