Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (9): 88-93.doi: 10.19964/j.issn.1006-4990.2022-0697

• Environment·Health·Safety • Previous Articles     Next Articles

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 Online:2023-09-10 Published:2023-09-19
  • Contact: WANG Liping E-mail:lichao_1122@163.com;chwlp2008@163.com

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

CLC Number: