Steam-Assisted Synthesis of Magadiite from Illite Silica Residue andIts Adsorption of Cu2+

Abstract

Abstract: The pure phase magadiite with high yield and high crystallinity was synthesized using illite silica residue by steam-assisted conversion (SAC).X-ray diffractometer (XRD) and scanning electron microscopy (SEM) were used to investigate the influences of Na₂O/SiO₂ molar ratio,crystallization temperature (T) and crystallization time (t) on the structure and morphology of synthesized samples.The results show that the preliminary optimization of synthesis conditions of this system are n(Na₂O)/n(SiO₂)=0.15,T=170 ℃,t=16 h,and the sample morphology is rosette-like (about 12 μm).The Cu²⁺ adsorption test of magadiite synthesized was carried out,and the effects of adsorbent dosage,pH value,adsorption time and Cu²⁺ initial concentration on the adsorption effect were studied.The results show that when the adsorbent dosage is 2 g/L,the pH value is 5,and the adsorption time is 30 min,the maximum adsorption capacity of magadiite for Cu²⁺ is 25.99 mg/g.

Key words: illite silica residue, steam-assisted conversion, magadiite, Cu²⁺, adsorption property

CLC Number:

TQ170.1

GUAN Dongdong, LI Xinyu, CHEN Shuang, SU Chongyang, YANG Siqi, JIANG Nanzhe. Steam-Assisted Synthesis of Magadiite from Illite Silica Residue andIts Adsorption of Cu²⁺[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 194-200.

References

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Steam-Assisted Synthesis of Magadiite from Illite Silica Residue andIts Adsorption of Cu²⁺

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