Ceramic filter material was developed mainly with coal fly ash and used as an absorbent for Cr(VI) removal. This material was characterized through physico-chemical analysis with scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS) and mercury porosimeter. Then static adsorption experiment was carried out to study adsorption characteristics of Cr(VI) on this filter material. SEM patterns indicated this material had enormous specific surface area and high porosity. EDS results showed this material was mainly composed of O, Si, C, Al, Mg, Fe, Ca and K in various compounds. Total pore area and porosity above 1.5 nm were 66.8 m2/g and 60.1% respectively. The main parameters affecting Cr(VI) adsorption were dosage and contact time. 200 g/l dosage of this filter material could remove more than 90% of Cr(VI) to solution with 20 mg/l initial concentration. Adsorption isotherm accorded with both Langmuir and Freundlich model. The study proved this ceramic filter material was a good adsorbent with high adsorption capacity to Cr(VI).

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.