| Carbon matrix composites are widely used in the environment,materials,electronics and chemicals because of their unique physicochemical properties and structure.The ability to effectively remove pollutants such as heavy metals makes them very promising in the field of environmental management.The design and development of efficient and cost effective carbon matrix composites is key in this field.The intermediate Fe/Al-OH was first prepared using iron and aluminium salts,and then Fe/Al-HANa was prepared by in situ co-precipitation with HANa;the effect of Fe/Al molar ratio,hydrothermal time and hydrothermal temperature on the adsorption effect of Fe/Al-HANa was investigated by the removal rate of lead by Fe/Al-HANa,and the better preparation conditions for Fe/Al-HANa were determined;the adsorption mechanism of Fe/Al-HANa was investigated by p H,the amount of Fe/Al-HANa added and the temperature on the adsorption of lead and copper ions by zebrafish.The effect of Fe/Al-HANa addition and temperature on the adsorption of lead and copper ions by Fe/Al-HANa was investigated;the biosafety of Fe/Al-HANa was preliminarily evaluated by feeding zebrafish.The results showed that the maximum adsorption amounts of lead and copper ions were 80.60 mg/g and 44.89 mg/g for Fe/Al-HANa at a molar ratio of 2:1,120 ℃,24 h,and m(Fe+Al):m(HANa)= 2:1.The adsorption of lead and copper ions in water by Fe/Al-HANa was in accordance with the secondary kinetic model and belonged to chemisorption;the adsorption process of Fe/Al-HANa on copper ions was in accordance with the Langmuir thermodynamic model and belonged to monomolecular layer adsorption,and the adsorption on lead ions was in accordance with the Freundlich model and was non-homogeneous adsorption,and the toxicological experiments tentatively proved that Fe/Al-HANa had certain safety and purification effects on water bodies.Figure 38;Table 11;Reference 69... |
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