珍珠岩尾矿烧结砖的实验研究

以珍珠岩尾矿为原料进行烧结砖实验研究，发现该砖具有轻质、高强及保温等特点。珍珠岩尾矿烧结砖的生产，将有利于环保治理，又具有较为显著的经济效益。     

创建省级绿色社区的思路及评价指标体系研究

该文阐述了绿色社区的内涵和创建省级绿色社区的意义，提出了基本条件、环境质量、环境建设、环境管理、公众参与等五类23项省级绿色社区考核指标和评价标准，并探讨了创建工作思路。     

杭州湾南岸岸线变化对水动力的影响累积效应

基于FVCOM数值模型,针对杭州湾南岸区域,采用移动固边界的方法,对1984年、2010年以及2020年(规划岸线)3个不同时期杭州湾南岸区域的岸线地形进行了模拟,计算了各个时期水动力场。通过对比发现,在人工及自然因素长期对近岸岸线地形的共同改变作用下,金塘水道区域3个时期水动力场有较显著变化。分析宁波舟山海域间水道的三个过流断面的流量发现,3个年代流量有累积变化的趋势。经过进一步分析可推测,在落潮流挟沙能力足够的条件下,水动力的变化可能会进一步加剧南岸及金塘水道区域宁波港(镇海区、北仑区)的淤积,从而影响该区域港口航道的正常使用。     

冷喷涂Ni/Al2O3复合涂层在海洋大气环境下的腐蚀行为研究

目的 研究海洋大气环境对冷喷涂Ni/Al2O3复合涂层腐蚀损伤行为的影响,为提高合金钢的耐腐蚀性能提供依据.方法 采用冷喷涂技术在合金钢30CrMnSi表面制备Ni/Al2O3复合涂层,在万宁近海岸户外和海洋平台分别暴露6个月后,采用扫描电镜、电化学工作站等分析检测技术,研究Ni/Al2O3复合涂层在万宁海洋大气环境下...     

杂色云芝处理高浓度味精废水初探

研究了杂色云芝对等电提取谷氨酸后浓缩废母液处理效果,考察了浓缩废母液的不同百分比浓度和初始pH对杂色云芝脱色率、COD去除率及菌体生物量的影响,同时还考察了杂色云芝处理废母液后pH的变化情况。研究结果表明,利用杂色云芝处理高浓度味精废水,不仅可去除COD而且有脱色效果。生产的菌丝体还可进一步作为动物饲料,投资少、成本低、不会产生二次污染,还可带来一定的经济效益。对不同百分比浓度的味精废水试验发现,30％浓度的味精废水处理效果最好,COD去除率为49．26％,脱色率为56．67％,菌体干重为5．8g／L。味精废水的初始pH对处理效果有一定的影响,初始pH为5．0时,最高COD去除率为50．12％,最大脱色率为55．8％。     

煤矸石制备聚合氯化铝的试验研究及应用

以三氧化二铝质量分数为22.58％的煤矸石为原料,采用酸溶法制备高效絮凝剂聚合氯化铝(PAC).在聚合时间为30 min,温度为60℃,pH值为3.7的条件下制成的PAC符合国家标准(GB 15892-2009).对自制和市售PAC的混凝性能进行了试验研究.结果表明,在优化后的试验条件下,自制PAC处理高岭上废水的效果优于市售PAC.     

Seasonal features of aerosol particles recorded in snow from Mt. Qomolangma （Everest） and their environmental implications

To assess the seasonality of aerosol deposition and anthropogenic effects on central Himalayas, a 1.85-m deep snow pit was dug on the northern slope of Mr. Qomolangma (Everest). Based on the morphology and energy dispersive X-ray (EDX) signal, totally 1500 particles were classed into 7 groups: soot; aluminosilicates; fly ash; calcium sulfates; Ca/Mg carbonates; metal oxides; and biological particles and carbon fragments. The size distribution and number fractions of different particle groups exhibited distinct seasonal variations between non-monsoon and monsoon periods, which are clearly related to the differences in air mass pathways. Specifically, the relative abundance of soot in non-monsoon period (25%) was much higher than that in monsoon period (14%), indicating Mr. Qomolangma region received more anthropogenic influence in non-monsoon than monsoon period.     

氨氧化菌混培物在O2/微量NO2下的氨氧化动力学

运用序批式试验,在无分子氧条件下,确定了好氧氨氧化菌的NO2型氨氧化动力学方程,得到了最大氨氧化速率[qNO2.max=0.144 mg·(mg·h)-1]、二氧化氮半饱和常数(KNO2=0.821μmol·L-1)和二氧化氮抑制性常数(Ki=1.721μmol·L-1).在微量NO2气体中添加2%O2氧气后,氨氧化速率明显提高,最大氨氧化速率发生在体积分数2%O2和50×10-6 NO2的条件下,达到0.198 mg·(mg·h)-1.在21%O2和微量NO2条件下,氨氧化速率继续大幅度提高;在21% O2和100×10-6 NO2时氨氧化速率达到0.477 mg·(mg·h)-1,比无NO2空气曝气条件下氨氧化速率高3倍.提出了NO2表观强化氨氧化函数的概念,建立了在O2和微量NO2混合气体下的氨氧化动力学方程,利用2%O2和微量NO2条件下的实验结果验证了动力学方程,讨论了NO2强化氨氧化的机理.     

Polycyclic aromatic hydrocarbon biodegradation and extracellular enzyme secretion in agitated and stationary cultures of Phanerochaete chrysosporium

The extracellular enzyme secretion and biodegradation of polycyclic aromatic hydrocarbons (PAHs) were studied in agitated and shallow stationary liquid cultures of Phanerochaete chrysosporium. Veratryl alcohol and Tween80 were added to cultures as lignin peroxidase (LIP) and manganese peroxidase (MnP) inducer, respectively. Shallow stationary cultures were suitable for the production of enzyme, whereas agitated cultures enhanced overall biodegradation by facilitating interphase mass transfer of PAHs into aqueous phases. The use of a LIP stimulator, veratryl alcohol, did not increase PAH degradation but significantly enhanced LiP activity. In contrast, Tween80 increased both MnP secretion and PAH degradation in shallow stationary cultures. On the other hand, high PAH degradation was observed in agitated cultures in the absence of detectable LIP and MnP activities. The results suggested that extracellular peroxidase activities are not directly related to the PAH degradation, and the increased solubility rather than enzyme activity may be more important in the promotion of PAH degradation.