本文采用间歇法研究了凹凸棒石在不同环境条件下(浓度、介质、pH值、温度)对Sr2+的吸附性能,并对吸附Sr2+后的凹凸棒石用XRD表征和分析,为评价中低放核废物处置效果提供一些参考依据.结果表明:凹凸棒石对Sr2+的平衡吸附量随Sr2+溶液的浓度升高而增大,而平衡吸附率和平衡吸附比随溶液的浓度增大而降低.凹凸棒石对Sr2+的吸附性能随pH增大而提高.在介质1中,凹凸棒石对Sr2+的吸附性能最好,在介质3、2、4中对Sr2+的吸附性能依次降低.在303 K以上时,凹凸棒石对Sr2+的吸附性能随温度升高而提高.吸附Sr2+后的凹凸棒石的晶胞参数a增大,晶胞参数b减小,其它晶胞参数变化在不同条件下各有规律.
参考文献
| [1] | 连会青,武强.大亚湾废物处置场中工程地球化学屏障的研究[J].中国矿业大学学报,2004(05):563-568. |
| [2] | Tsai SC;Ouyang S;Hsu CN .Sorption and diffusion behavior of Cs and Sr on Jih-Hsing bentonite.[J].Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine,2001(2):209-215. |
| [3] | Kodama T.;Shimizu T.;Shimizu K.;Komarneni S.;Hoffbauer W. Schneider H.;Higuchi T. .Synthesis of Na-2-mica from metakaolin and its cation exchange properties[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(8):2072-2077. |
| [4] | Dyer A.;Harjula R.;Amin S.;Pillinger M. .Sorption characteristics of radionuclides on synthetic birnessite-type layered manganese oxides[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2000(8):1867-1874. |
| [5] | 王金明,易发成.矿物材料对Sr2+、Cs+的竞争吸附性能与表征[J].原子能科学技术,2012(02):165-171. |
| [6] | 王金明,易发成.合成沸石对Sr2+的吸附性能及其表征[J].核动力工程,2010(02):89-93. |
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