Study on removal effect of dissolved organic nitrogen(DON)by ozone/metal modified activated carbon
To investigate the removal effect of ozone/metal modified activated carbon on DON in secondary effluent,the modified activated carbon was characterized using SEM,XRD and BET,and DON was quantitatively analyzed using three-dimensional fluorescence spectroscopy and regional volume integral analysis.The results showed that after activated carbon modification by metal loading,the surface of Fe-AC was mainly Fe3O4,the surface of Cu-AC was mainly CuO and Cu,the surface of Mn-AC was mainly MnO,and the surface of Pd-AC and Pt-AC was mainly elementary substance of Pd and Pt.Compared to AC before the load modification,the specific surface area and microporous specific surface area of Fe-AC had both increased to certain extent.The activated carbon modified with metal loading had improved the removal rate of DON to certain extent.In particular,Pd-AC had the best removal effect on DON,and the removal rate of DON increased from 56.1%before modification to 79.2%,with an increase of 23.1 percentage points.The standard volume of fluorescence regionsⅡandⅣin the secondary effluent accounted for 63.76%of the total standard volume of the fluorescence region.After ozone/metal modified activated carbon treatment,the standard volume of regionsⅠ,Ⅱ,Ⅲ,Ⅳ,Ⅴand the total fluorescence region showed a decreasing trend,with the highest removal rate of SMPs represented by fluorescence regionⅣ.
DONmodification by metal loadingactivated carbonozonethree-dimensional fluorescence spectroscopyremoval rate
万方数据
维普
