Application Research on the Adsorption of Cadmium Ion in Wastewater by Zeolite Molecular Sieve

Abstract

In this paper, the synthetic zeolite molecular sieve is used as the adsorbent to study the application of zeolite molecular sieves for the adsorption of cadmium ions in wastewater. It is found that the adsorption of cadmium ions in wastewater by zeolite molecular sieves reaches equilibrium at 90 min. In addition to the factor of time, temperature control is also the key to the adsorption of cadmium ions in wastewater by zeolite molecular sieves. In addition, the Langmuir model and the Freundilich model are used to describe the adsorption isotherm and it is discovered that the maximum adsorption capacity is 197.5 mg/g. When the pH value of the solution is 6, the adsorption capacity of cadmium ions in the wastewater by zeolite molecular sieves reaches the maximum value. In addition, the removal rate of cadmium ions in the wastewater will increase with the temperature. In summary, zeolite molecular sieves can effectively adsorb cadmium ions in wastewater. Therefore, zeolite molecular sieves have important application prospects in the treatment of cadmium ions in wastewater.