Simultaneous sulfadiazines degradation and disinfection from municipal secondary effluent by a flow-through electro-Fenton process with graphene-modified cathode

Abstract A monolithic-porous carbon (MPC) was fabricated by carbonizing a pine rod, and then the oxidized monolithic-porous carbon (O-MPC) was obtained via alkaline heat treatment of MPC. With well-ordered axial channels (diameters were 6–14 μm and 40–50 μm) and oxygen-containing functional groups, O-MPC as a flow-through cathode exhibited good capability in continuously generating H2O2 (422 μmol/L) via oxygen reduction. O-MPC and additional Fe2+ composed an electro-Fenton system and the performance of the system in degradation of organic pollutants was evaluated. For phenol, bisphenol A or sulfamethoxazole at initial concentration of 10 mg/L the removal efficiency reached 74%–82% in a hydraulic retention time of 100 seconds, nearly close to that of the homogeneous Fenton process (90%). This efficiency may be maintained for at least 10 hours, indicating a good stability of O-MPC. The results demonstrate the potential of O-MPC as a flow-through electrode to realize homogeneous-like degradation of organic pollutants in wastewater.

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Influence of industrial contamination in municipal secondary effluent disinfection by UV/H2O2

Environmental Science and Pollution Research ◽

10.1007/s11356-019-04705-1 ◽

2019 ◽

Vol 26 (13) ◽

pp. 13286-13298 ◽

Cited By ~ 3

Author(s):

Jacqueline A. Malvestiti ◽

Renato F. Dantas

Keyword(s):

Secondary Effluent ◽

Industrial Contamination ◽

Municipal Secondary Effluent

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The Removal of Inorganic Anions from Municipal Secondary Effluent Using Magnetic Ion Exchange Resin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.1170 ◽

2011 ◽

Vol 374-377 ◽

pp. 1170-1178

Author(s):

Jian Yang ◽

Jiang Chang ◽

Yi Ping Gan ◽

Jin Hua Gao

Keyword(s):

Ion Exchange ◽

Phosphorus Removal ◽

Removal Rate ◽

Exchange Process ◽

Reclaimed Water ◽

Phosphorus Concentration ◽

Secondary Effluent ◽

Ion Exchange Process ◽

Magnetic Ion ◽

Municipal Secondary Effluent

The primary objective of this research was to evaluate the effectiveness of a magnetic ion exchange process (MIEX) in removing inorganic anions from municipal secondary effluent. Municipal secondary effluent drew from Gaobeidian wastewater treatment plant treating about 800,000 m3/day domestic wastewater. In the pilot experiment, MIEX resin removed 37.01% phosphorus, 31.62% nitrate, 36.06% ammonium and 64.34% sulphate from municipal secondary effluent. Phosphorus concentration in resin influent influenced reclaimed water treatment efficiency. Phosphorus removal rate was positively correlated with the concentration in influent. If phosphorus concentration in influent was >0.82mg/L, phosphorus removal of >52% was achieved. Nitrate and sulphate removal had same variation laws. 18.92% average removal rate of nitrate in middle period was lower than 35.06% and 39.25% average removal rates in earlier and latter periods respectively. The average removal rates of ammonium in three periods were 83.03%, 43.51% and 84.29% respectively. Removed ammonium of each sample was about 0.250mg/L, average removal rate was 36.06%. Lower ammonium concentration in influent could cause higher removal rate. Otherwise, magnetic ion exchange process could increase turbidity and could not disinfect, the resin effluent will be treated with coagulation-sedimentation and ozonation for groundwater recharge research with reclaimed water.

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