4A zeolite/TiO2 composite catalysts modified with Ce，Mn and Pt were prepared through impregnation and liquid phase deposition. The prepared catalysts were characterized by SEM，XRD and ICP，and their catalytic performances were evaluated with a self-made fixed bed reactor. Results showed that the catalytic performance of 4A zeolite/TiO2 composite catalyst is evidently enhanced compared with that of 4A zeolite，and the ethylene production is further improved when the composite catalyst is modified with Pt. The composite catalyst modification with Ce and Mn exhibits better catalytic performance than either the one modified with Ce or Mn. The enhanced catalytic performance might be attributed to the increased oxygen vacancies in the composite catalysts by the acceptance of thermal-induced electrons with the supported TiO2 from 4A zeolite.

Supported solid base catalyst KF/CaO/carclazyte for biodiesel preparation was prepared by co-mixture impregnation technology. Effects of catalyst preparation conditions on catalytic activities were studied. The structure and properties of the catalyst were characterized by SEM，TEM and BET. The optimal conditions to prepare catalyst are：mass ratio of carclazyte to CaO is 3∶7，KF loading is 20%，calcination temperature is 873 K，calcination time is 4 h. Thus prepared catalyst brings about more than 96% biodiesel yield from sapium sebferum seed oils. The catalyst characterization showed that the catalyst has a multiporous netlike structure with a particulate diameter of 30－100nm，an average pore size of 43 nm and a specific surface area of 113.9 m2/g.

Polyaspartic acid (PASP)，a novel kind of polyamino acid，possesses excellent biocompatibility and biodegradability. This review summarizes the advances in hydrogels prepared from PASP and its derivatives. The preparation of PASP hydrogels by chemical crosslinking，photocrosslinking and γ-ray crosslinking are discussed. The investigation and development of PASP hydrogels used for controlled release of protein drugs，small molecule anti-inflammatory drugs，anticancer drugs and gene-drugs are presented. The development trend and promising application of PASP hydrogels in controlled drug release and tissue engineering fields are predicted.

Although chitosan is a biocompatible，biodegradable and nontoxic polymer，its application suffers severe limitations because it is insoluble in neutral or alkaline media. This paper reports the synthese of Schiff base of chitosan by the reaction of chitosan with citral assisted with high-intensity ultrasound. Effect of the ratio of chitosan to citral，reaction time and temperature on the yield and the degree of substitution has been investigated. The optimal conditions were found to be with reaction temperature of 40－50 ℃，the ratio of chitosan to citral of 1∶6 and 10 h of reaction time. The maximum yield was achieved to 86% and the degree of substitution was 0.82 under the optimized reaction conditions. The structure of the Schiff base was characterized by FTIR and XRD spectroscopy，which confirmed that the amino groups in chitosan have been reacted with citral to form the Schiff base. The antibacterial activities of the Schiff base were investigated by assessing the inhibitory rates of Escherichia coil，Staphylococcus aureus and Aspergillus niger. The MICs of Schiff base against E. coli，S. aureus and A. niger were found as 1g/L，1g/L and 5g/L，respectively. The antibacterial activity of the Schiff base increases with the increase in bacterial concentration and is stronger than that of chitosan.

The synthesis and characterization of nano-scale zero valent iron and transformation of contaminant in anaerobic aquatic environment are summarized. Analysis of the characteristics and mechanisms of chloric organic compound and heavy metal ion reduced by nano-scale zero valent iron are focused. The problem need to solve and research area need to study about nano scale zero-valent iron technology are proposed.

An aerobic denitrifying bacterial strain was loaded on nano Fe3O4 and applied to deal with actual living wastewater. The effects of free bacterial strains and immobilized bacterial strains for living wastewater treatment were compared. The optimum treatment conditions of free bacterial strains for wastewater are pH=6.8，30℃and 2 days of incubation time.，while those of immobilized bacterial strains are pH=7.8，30℃ and 3∶1 of Fe3O4/ dry weight of bacteria. The treatment effects of the bacterial strains are evidently improved by the immobilization on nano Fe3O4. The removal rates of total nitrogen，inorganic phosphorus and COD attained to 75.56%，38.83% and 87.5%，respectively. The bacterial strains loaded on nano Fe3O4 maintained high activities to remove total nitrogen，inorganic phosphorus and COD even repeatedly regenerated，which have broad application prospects in the area of nutrition –rich wastewater treatment.

Copolymers of acrylamide(AM)- acrylic acid( AA)- propylene hydroxamic acid (AHA) were synthesised by inverse emulsion polymerization. It is investigated the impact of propylene hydroxamic acid content in copolymer，copolymer dosage and pH in electroplating wastewater to the metal ions removal effect. The results showed：pH = 10，propylene hydroxamic acid content in the polymer≥10%，amount of the copolymer 20—30 mg/L in electroplating wastewater，removal of the metal ions is most effective，chromium，copper，nickel and zinc metal ions removal ratio ≥99.5%，the concentration of any ion ≤0.2 mg/L in treated water.