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The simultaneous removal of NO x and SO 2 was demonstrated by an integrated O 3 oxidation/wet atomizing system. The dielectric barrier discharge with silicone rubber dielectrics was used for generating O 3 to oxidize NO and SO 2 . The O 3 yield and O 3 energy yield were evaluated to be 13.3 g/h and 53.7 g/kWh, respectively. NO was effectively oxidized by O 3 , while SO 2 was not significantly oxidized because the reaction rate of NO oxidation was much higher than that of SO 2 . The highest oxidation efficiencies of NO and SO 2 were 97 and 8%, respectively. NO x and SO 2 were absorbed as aqueous ions with a mist of H 2 O 2 solution supplied by an ultrasonic humidifier. The total removal efficiencies of NO x and SO 2 were 88.8 and 100%, respectively. NO and SO 2 were oxidized to NO 2 , HNO 3 , N 2 O 5 , and SO 3 by O 3 . These species were absorbed to form NO 3 − , HSO 3 − , and SO 4 2− by reactions with the H 2 O 2 solution.

A highly porous organic polymer, CBAP-1, was synthesized from terephthaloyl chloride and 1,3,5triphenylbenzene via the Friedel−Crafts reaction, and functionalized with either ethylenediamine (EDA) or 2-aminoethanethiol (AET) for Hg 2+ removal from water. Both materials were characterized by X-ray diffraction, N 2 adsorption−desorption isotherms, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma and elemental analysis, and the stability of the porous polymers under different pH and temperature conditions was examined. The adsorption experiments were carried out by varying contact time, Hg 2+ concentration, and system pH to study the adsorption equilibrium and kinetics. The Hg 2+ ion-adsorption capacities of CBAP-1(EDA) and CBAP-1(AET) were 181 and 232 mg/g, respectively, at room temperature and pH 5, and the observed adsorption isotherms could be fitted well to the Langmuir model (correlation factor R 2 > 0.99). Under the optimum set of conditions, the adsorption equilibrium for CBAP-1(AET) was reached within a contact time of 10 min; CBAP-1(AET) exhibited an excellent distribution coefficient of greater than 2.41 × 10 7 mL/g. The adsorption kinetics could be satisfactorily described by a pseudo-second-order model. Hg 2+ recovery in the presence of commonly coexisting metal ions such as Na + , Ca 2+ , Mg 2+ , Pb 2+ , and Fe 3+ was also investigated. CBAP-1(AET) showed high Hg 2+ selectivity against other ions except Pb 2+ . CBAP-1(AET) was superior to CBAP-1(EDA) in terms of overall performance; it could efficiently remove >96% of Hg 2+ ions in 2 min from a 100 ppm of Hg 2+ solution. The material could be reused for 10 consecutive runs with negligible loss in adsorption capacity.

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