Adsorption Performance and Mechanism of Manganese From Wastewater by Cheese-Like MgO
The cheese rod-like magnesium oxide(C-MgO)was obtained via pyrolyzing basic magnesium carbonate precursor with rod shape synthesized from magnesium sulfate and ammonium bicarbonate in solution in the absence of surfactants.The surface morphology,phase composition,functional groups and other physical and chemical properties were analyzed using SEM,XRD,FT-IR,TG characterizations.The adsorption efficiency and mechanism of manganese by C-MgO were investigated.The results show that the C-MgO exhibits a supremely high adsorption capacity of 5 793 mg/g of manganese,which is higher than the reported adsorbents.In addition,kinetic results show that the C-MgO can achieve rapid removal of manganese from wastewater with low dosage of 0.08 g/L.The results of adsorption mechanism study showed that the main adsorption mechanism of C-MgO for manganese is MgO protonation,manganese hydroxide coordination,magnesium manganese complexation,during which the MgO transformed into MgMn2Oi by chemisorption.The fixed bed adsorption experiment proves that C-MgO has a good potential application prospect.Therefore,this investigation provides a facile strategy for preparing high-performance cheese-like MgO,which can achieve efficient removal of manganese from wastewater.
NETL
NSTL
万方数据
维普
