水化硅酸钙的制备及其吸附性能  

Preparation and adsorption properties of calcium silicate hydrate

作　　者：张宏森 郭语桐 蒋保江[2] 王君[3] 

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022 [2]黑龙江大学化学化工与材料学院,哈尔滨150086 [3]哈尔滨工程大学材料与化工学院,哈尔滨150001

出　　处：《黑龙江科技大学学报》2018年第1期65-69,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(21771061);哈尔滨市科技创新人才研究专项资金项目(2014RFQXJ035)

摘　　要：为获得性能优异的吸附材料,以工业废物白泥和油页岩灰为原料制备水化硅酸钙,利用X射线粉末衍射仪和透射电子显微镜等分析其结构和形貌,并通过重金属吸附实验分析其吸附性能。结果表明:水化硅酸钙具有薄片相互交错的网状结构,最佳合成条件为反应温度25℃、钙硅比1.5。水化硅酸钙吸附过程符合Langmuir吸附热力学模型。它对U^(6+)、Pb^(2+)、Cd^(2+)、Cr^(3+)四种重金属离子的最大吸附容量均大于200 mg/g,去除率均大于86%。其优异的吸附性能主要源于薄片层结构和离子交换机制。该研究为溶液中重金属去除提供了廉价、高效的吸附材料,对于白泥和油页岩灰资源化利用亦具有推动作用。This paper is an attempt to obtain excellent adsorbents. The research process involves preparing calcium silicate hydrate（ CSH） from white mud and oil shale ash; characterizing the structural and morphological properties of CSH by XRD and HRTEM; and analyzing the adsorption properties of CSH by adsorption of heavy metals ion（ HM） from aqueous solution. The results show that CSH has a mesoporous structure interlaced with nanosheets and is best synthesized by the reaction temperature of 25 ℃ and calcium-silicon ratio of 1. 5; the adsorption process of hydrated calcium silicate conforms to the thermodynamic model of Langmuir adsorption; CSH has the maximum adsorption capacity of more than 200 mg/g and the removal rate of more than 86% when it comes to the four heavy metal ions,such as U^（6 ＋）,Pb^（2 ＋）,Cd^（2 ＋）,and Cr^（3 ＋）; and its excellent adsorption performance results from the lamellar structure and ion exchange mechanism. The research may provide a low-cost and high-efficiency adsorbent and facilitate the utilization of white mud and oil shale ash resources.

关 键 词：水化硅酸钙 制备 吸附性能 油页岩灰 白泥 

分 类 号：TQ050.43[化学工程] X751[环境科学与工程—环境工程]