Application of Modified Yolite in Rural Domestic Wastewater Treatment
The adsorption capacity of unmodified Yolite powder and H2O2-modified Yolite powder was investigated for the adsorption of ammonia ions in rural domestic wastewater using three types of Yolite powders: two unmodified Yolite powders with different particle size distributions and H2O2-modified Yolite powder. Various techniques were used, including X-ray diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET) multilayer adsorption theory measurements, the results demonstrated that Yolite powders could be used as adsorbents for NH4+ ions in water. The particle size of Yolite powder was studied by dynamic light scattering. The nitrogen adsorption-desorption isotherms showed a mixture of type I (pure microporous) and type IV (mesoporous) isotherms. It was shown that the studied Yolite material was mesoporous (4.84 nm) and microporous (0.852 nm) and contained slit/cylindrical pores according to the density flood theory (QSDFT) adsorption branch model. The modified Yolite exhibited good NH4+ adsorption performance (72％ removal efficiency) and was a potential adsorbent for the treatment of rural domestic wastewater contaminated with ammonia ions.
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