Adsorption performance and influencing factors of manganese sand filter media on phenol removal in drinking water treatment plant

In order to understand the adsorption performance and influencing factors of manganese sand filter material on phenol, the waste material produced after the operation of biological manganese sand filter was used as adsorbent. The adsorption performance of manganese sand filter material on phenol under different pH, temperature and dissolved oxygen conditions was studied respectively. The adsorption law of manganese sand filter material was studied by adsorption kinetic model and adsorption isotherm model. The results showed that the adsorption process of manganese sand media for phenol was in accordance with the internal diffusion kinetic model and Temkin isothermal adsorption model, being the monolayer adsorption. The adsorption effect was mainly affected by the diffusion rate of phenol. Through the calculation of n value of adsorption isotherm, it is found that manganese sand filter material is easy to adsorb phenol. The pH had the greatest effect on the removal of phenol from manganese sand filter. When pH=3.0, phenol could be removed completely. The removal rate of phenol decreased gradually with the increase of pH. The effect of hypoxia on phenol adsorption was not significant under neutral condition. The removal rate of phenol was increased by increasing the dosage of manganese sand filter material under low temperature condition. The removal rate of phenol was increased 20 percent for every 1.5 times of manganese sand filter material. When that manganese sand filter material is applied to remove phenol from the underground water, the method should achieve the good effect of recycling waste and repairing phenol pollute water body, does not generate secondary pollution phenomenon, and has good application prospects.