The waste water treatment effect of activated sludge under low dissolved oxygen conditions studied using SBR technology.The results indicated that the best removal rate was achieved when the dissolved oxygen concentration was stabilized at 1 mg/L, the time of in-fluent was half an hour, the mixing of facultative anaerobic was also half an hour, and the aeration was 3 hours.Under this conditions, the average concentrations of COD, ammonia ni-trogen and phosphate in the reactor effluent were 48.46 mg/L, 7.65 mg/L and 0.42 mg/L, respectively, and the removal rates were 82.73%, 80.66%and 92.18%, respectively.

Nano ZnO/graphene composites were prepared by the oxidation of graphite and nano ZnO as the precursors under the condition of water temperature at 120 ℃.The photo-catalytic activity of the composite was detected to treat simulated antibiotic wastewater by u-sing the solution of ceftazidime with 300 W xenon lamp light source .The optimal conditions for the degradation of the composite material were obtained by single factor test and orthogo -nal test.The optimized conditions were obtained as follows: the amount of catalyst was 25 mg, the time was 3.5 h, and the pH value was 6.The ratio of ZnO and graphene oxide was 15∶1.The degradation rate of the solution of ceftazidime could reach 95%.

用溶胶凝胶和水热方法合成了TiO2和石墨烯的复合材料,对模拟制药废水进行了光催化氧化处理的研究.以盐酸土霉素模拟抗生素废水,对复合材料的光催化性能进行测试,进行了单因素实验,确定最佳处理抗生素制药废水的工艺条件.实验表明,催化剂投加量为10 mg、盐酸土霉素溶液质量浓度为20 mg/mL、反应时间为0.5h时,光催化降解效果最好,可以达到82.53％.

分别制作了氧化亚铜催化剂、石墨烯催化剂、氧化亚铜/石墨烯复合催化剂(Cu2O/石墨烯)用于处理甲基橙废水,并采用X射线衍射(XRD)、扫描电子显微镜(SEM)和能谱(EDS)等技术对Cu2O/石墨烯复合催化剂的物相和形貌进行表征.结果表明,Cu2O/石墨烯复合催化剂中Cu2O属于立方晶型,且呈粒子状较均匀地分散在薄层石墨烯表面.3种催化剂在可见光、pH值为中性、常温条件下,对甲基橙废水中COD和色度均有较高的去除率,其中Cu2O/石墨烯复合催化剂对甲基橙废水的降解效果最好,当甲基橙废水中COD为335 ～1 452 mg/L时,在最佳投加量为0.6g/L的条件下,对COD的去除率可达到96.7％ ～ 97.4％,且催化效果受甲基橙废水浓度的影响较小,甲基橙废水降解的较佳pH值范围为7.2 ～7.8.

随着医院的信息化建设的深入推进,公立医院的政府审计风险发生着深刻的变化,不仅是审计内容和审计线索的改变,对审计人员的专业性也提出了更高的要求.造成这种情况的原因是多方面的,如法律法规和内控制度的不完善,缺少专业的审计软件,审计人员专业性不强等.在此背景下,我国应完善信息化条件下的审计法律法规体系建设,鼓励审计方法创新,提高审计人员素质,以此降低审计风险,促进医院进一步发展.

Fe2O3 nanorods grown on reduced graphite oxide(RGO) was synthesized via a facile hydrothermal method followed by a heat-treatment process. The Fe2O3 nanorods grown on the RGO has a average diameter of 40 nm, which is smaller than the pure Fe2O3 nanorod. Investigated as an anode material for Li-ion batteries, the composites exhibits a stable and reversible capacity of over 1000mAh g(-1) and better cycle performance than Fe2O3 nanorods. The improving performance may because that the structrue provides a short path for lithium-ion diffusion and effective accommodation of the strain generated from volume expansion during the lithiation/delithiation process.

Recently years many large lakes are eutrophic or in serious state of eutrophication. And most eutrophic water from phosphorus control action is the amount of input, so how to effectively reduce the phosphorus content of sewage has become noticeable within the field of environmental protection issues. In the present study natural zeolite as material and finding that the original zeolite adsorption effect only is 8%-18%. Due to the removal effect, choose modified zeolite, through to the acid and alkali salt for respectively, then insure that using 20% MgCl2 best of static test examines the pH, temperature, adsorption time, the effects of the removal rate could reach 70%-85%. The last time, dosing quantity for the orthogonal experiment research, determine the optimum condition of the adsorption is at 25 degrees C, 160min, 5g respectively, and the removal efficiency can reach 82%.