无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (9): 88-93.doi: 10.19964/j.issn.1006-4990.2022-0697

• 环境·健康·安全 • 上一篇    下一篇

高硅渣碱熔水热合成13X分子筛及吸附铅铜锌离子研究

李超(), 王丽萍(), 戴崟, 高桂梅, 张云峰, 洪雨, 许立军, 崔永杰   

  1. 中国神华哈尔乌素露天煤矿,内蒙古 鄂尔多斯 010300
  • 收稿日期:2022-11-25 出版日期:2023-09-10 发布日期:2023-09-19
  • 通讯作者: 王丽萍(1984— ),女,博士,高级工程师,主要从事粉煤灰综合利用;Email:chwlp2008@163.com
  • 作者简介:李超(1983— ),男,博士,高级工程师,主要从事粉煤灰中有价元素提取及高附加值开发利用;Email:lichao_1122@163.com
  • 基金资助:
    国家科技部十二五科技计划支撑项目(2011BAA04B05)

Study on alkali fusion hydrothermal synthesis of 13X zeolite from high silicon tailings and its adsorption on lead,copper and zinc ions

LI Chao(), WANG Liping(), DAI Yin, GAO Guimei, ZHANG Yunfeng, HONG Yu, XU Lijun, CUI Yongjie   

  1. Shenhua Haerwusu Open-pit Coal Mine of China,Ordors 010300,China
  • Received:2022-11-25 Published:2023-09-10 Online:2023-09-19

摘要:

准格尔地区矸石电厂的循环流化床粉煤灰可通过“一步酸溶法”工艺提取出冶金级氧化铝。以提铝后高硅尾渣为原料采用碱熔融-水热工序合成了13X分子筛,详细考察了碱渣质量比、添加水量、合成温度对13X分子筛合成的影响,开展了13X分子筛对铅、锌、铜单组分溶液的吸附测试。研究表明:碱渣质量比为2.25、添加水量为35 mL和合成温度为90 ℃时,13X分子筛样品的晶粒尺寸为3~5 μm,表面粗糙、呈八面体、比表面积为592.1 m2/g。吸附测试证实:当溶液pH≥6.52时,Pb2+、Zn2+、Cu2+的去除率均达到99%,相应的饱和吸附量分别为35.82、49.18、41.19 mg/g。由此可见利用高硅尾渣合成13X分子筛在重金属废水处理方面具有较好的应用前景。

关键词: 高硅渣, 碱熔融-水热, 13X分子筛, 吸附, 重金属离子

Abstract:

The metallurgy level alumina was obtained from the circulating fluidized bed fly ash of the gangue power plant in Zhungeer area by one-step acid dissolution process.13X zeolite was synthesized by alkali melting hydrothermal process,and the high silicon tailing was used as resources.The effects of alkali to slag mass ratio,water amount and synthetic temperature on synthesis of 13X zeolite were investigated in detail,as well as the adsorption capability test of 13X zeolite on removing Pb2+、Zn2+ and Cu2+ ions solution.The research showed that the grain size was 3~5 μm with rough surface,the synthetic 13X zeolite was octahedral structure and the surface area was 592.1 m2/g under the experimental condition:alkali slag mass ratio of 2.25,water volume of 35 mL,and the synthetic temperature of 90 ℃.The adsorption test confirmed that the removing rate of three type ions was 99% when the pH value was larger than 6.52,and the relative saturated adsorption capacities was 35.82,49.18,41.19 mg/g,respectively.Thus,13X zeolite synthesized from high silicon tailings had good market prospects in the treatment of heavy metal wastewater.

Key words: high silicon tailings, alkali melting-hydrothermal, 13X zeolite, adsorption, heavy metal ions

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