A new type of a non-light concentrating solar photoreactor with immobilized catalyst was developed, where a flat and transparent structured box made of polymethylmethacrylate comprised the main body, and immobilized TiO2 membrane supported on glass fiber net with sol-gel method was used as catalyst. Phenol was used as model pollutant to evaluating the device performance. The limitation of mass transfer was diminished when the circular flux exceeded 2L/min. The apparent reaction kinetics was first order with respect to the phenol concentration, and the apparent kinetic constants decreased with the increase of initial concentration. The linear dependence between apparent reaction rate and radiation density flux was found from 12.8 to 47.6 W/m2. The new reactor, which treated phenol in tap water with high efficiency, has a promising prospective in real drinking water treatment.

Adsorption characteristics of Ni (II) by Palygorskite were investigated using a batch adsorption, and the effects of various experimental parameters were discussed. Results showed that the adsorption capacity of palygorskite for Ni (II) increased with increasing contact time and amount of adsorbent. Ni (II) adsorption onto palygorskite was well fitted by the pseudo-first-order kinetic model. Adsorption capacity increased to a maximum as the treating temperature increased to 673K. Heat-activation at 773K resulted in degradation of channel structure and adsorption capacity loss of palygorskite. With increasing HCl concentration of acid treating solution, adsorption capacities for Ni (II) decreased firstly and then increased, a minimum was obtained at 4mol/L of HCl concentration.

The effects of molybdenum (Ⅵ) on the denitrification efficiency of activated sludge process were investigated with batch tests. The results indicated that up to 5 mg/L of Molybdenum (Ⅵ) concentrations in the liquor of activated sludge process could accelerate the nitrate removal rate, exhibiting maximum stimulation at 1 mg/L. Up to 4 mg/L of Molybdenum (Ⅵ) concentrations, the COD removal efficiency was enhanced. Up to 1mg/L of Molybdenum (Ⅵ) concentrations, the TTC-DHA was enhanced but higher concentration showed inhibitory effects. Based on the integrated effects of Molybdenum (Ⅵ) on nitrate and COD removal with the TTC-DHA change, 1mg/L of Molybdenum (Ⅵ) is proposed as the best concentration for denitrification of activated sludge.