Welcome to Visit BULLETIN OF THE CHINESE CERAMIC SOCIETY! Today is

BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2023, Vol. 42 ›› Issue (5): 1864-1874.

Special Issue: 陶瓷

• Ceramics • Previous Articles     Next Articles

Preparation of Novel Zeolitization Ceramsite for Ammonia Nitrogen Wastewater Treatment

WANG Ning1,2,3, CHEN Yuxin1,2,3, XU Wensheng1,2,3, AN Shengli1,2,3, PENG Jun1,2,3, PENG Jihua1,2,3   

  1. 1. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    2. Inner Mongolia Autonomous Region Key Laboratory of Advanced Ceramic Materials and Devices, Baotou 014010, China;
    3. Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Ministry of Education, Baotou 014010, China
  • Received:2023-02-02 Revised:2023-02-20 Online:2023-05-15 Published:2023-06-01

Abstract: Fly ash and iron tailings were used as main raw materials, and a novel zeolitization ceramsite was successfully prepared by high temperature sintering activation-hydrothermal synthesis process. Basic ceramsite was obtained by high temperature sintering while activating inert phases such as mullite in the raw materials, then the zeolite modification of the basic ceramsite by hydrothermal reaction was carried out to increase the specific surface area and adsorption capacity of ammonia nitrogen. The results show that the optimum preparation conditions are as follows: m(fly ash)∶m(iron tailings)∶m(quartz sand)=7∶1∶2, sintering temperature is 1 040 ℃, sintering time is 30 min, NaOH solution concentration is 1.5 mol/L, hydrothermal temperature is 160 ℃, hydrothermal time is 12 h. XRD, SEM, FT-IR and Raman tests show that the main crystal phase of the zeolitization ceramsite is zeolite P and analcime. And its specific surface area increases from 1.068 m2/g of the basic ceramsite to 35.770 m2/g, and the maximum adsorption capacity for NH+4-N increases from 1.82 mg/g of the basic ceramsite to 13.34 mg/g, which increase to 33.49 times and 7.33 times of the basic ceramsite, respectively. The present results of this experiment show that zeolitization ceramsite has potential applications in wastewater treatment.

Key words: fly ash, iron tailing, zeolite, ceramsite, adsorption, wastewater treatment

CLC Number: