漂白纸浆废水对鲫鱼(Carassius auratus)肝脏微粒体代谢酶的影响

实验研究了一种漂白纸浆废水对鲫鱼(Carassiusauratus)的急性毒性以及肝脏微粒体尿二磷酸葡萄糖醛酸转移酶(UDPGT)和谷胱甘肽硫转移酶(GST)的影响,在生物化学水平探索低浓度漂白纸浆水对鱼类的危害.实验结果表明,该漂白纸浆废水的96hLC50和168hLC50分别为43.90±3.09%和29.66±6.20%.暴露30d后,10%和12%原废水处理组能显著地诱导鲫鱼肝脏微粒体酶GST的活性,然而,8%、10%和12%原废水处理组能显著地抑制UDPGT的活性(P<0.05).     

硝酸尾气中氮氧化物净化技术研究

介绍用酸性尿素溶液作吸收剂 ,吸收硝酸尾气中氮氧化物的净化方法。用正交试验法选择最佳工艺条件 ,并对其结果进行极差分析和方差分析。该法具有去除率高、没有第二次污染、成本低的特点     

THE EFFECT OF TRANSITION METAL IONS-IRON ON HYDROGEN PEROXIDE BLEACHING

INTRODUCTIONHydrogen peroxide bleaching has been extensively used in high-yield pulp bleaching. IT is well known that hydrogen peroxide can be easily decomposed under alkaline conditions, especially in the presence of transition metal ions due to their catalyzing effect on the decomposition of hydrogen peroxide. Some recent reports show that the valence of transition metal ion can have a drastic effect on the decomposition of hydrogen peroxide.Generally, iron can exist in Fe2+ and Fe3+…     

一体式膜生物反应器处理城市生活污水水质及回用分析

城市缺水问题日益突出,城市生活污水作为第二水源回用极为迫切.分析了膜生物反应器处理城市污水出水水质及其回用情况.实验中试表明,膜生物反应器处理城市生活污水,系统运行稳定,出水水质优于中国建设部部标生活杂用水水质标准(CJ25.1-89),可直接用于城市绿化、冲厕、扫除及洗车.具有良好的环境、经济和社会效益.     

一种新型高效有机无机复合絮凝剂处理制药废水的研究

以有机胺、环氧氯丙烷、聚丙烯酰胺、聚丙烯酸、铁盐和铝盐为原料,研制出一种既含有酰胺基团和阳离子季胺盐基团,又含有阴离子羧酸基团的高效有机无机复合型絮凝剂F-1.研究了F-1的絮凝性能,结果表明,F-1是一种优良的制药废水处理剂,在絮凝剂的用量为300mg·L-1进行某制药废水处理时废液中的CODCr、SS、色度的去除率分别为69.7%,96.4%,87.5%.其性能明显优于聚丙烯酰胺(PAM)、聚合氯化铝(PAC)、聚合硫酸铁、硫酸铝、硫酸亚铁等絮凝剂.     

中途集水对沉淀池的影响分析

为了防止出水堰负荷过高影响出水水质,沉淀池中常增加出水堰的长度.基于Camp式理想沉淀池相关理论,分析增设出水堰时沉淀池的工作情况.认为适当增加沿途集水可以提高沉淀池的水力负荷.为了保证水力负荷增大时的处理效率,可以采用强化措施.经过初步的经济分析,认为通过中途集水实现初次沉淀池挖潜是可行的.     

不同潜流湿地去除污水中磷素的反应动力学

采用不同潜流型人工湿地对污水处理厂二级出水进行深度处理研究,分析其对磷素去除效果及其反应动力学模型。结果表明,在选取相同水力负荷条件下,与垂直潜流湿地相比,水平潜流湿地对污水中的磷素的去除表现出了较好的去除趋势;而与水平-沸石湿地相比,水平-石灰石湿地则表现出了对磷素更佳的去除效果,其去除率则基本稳定在663．±33．2％～920．±48．2％。另外,根据反应动力学模拟分析可知,四种潜流湿地符合一级反应动力学方程特点,即其对磷素的去除过程基本可以认为只进行到一级反应。     

Photochemical alteration of biogenic particles in wastewater effluents

Biogenic particles discharged by wastewater treatment plants play important roles in receiving water because of the large specific surface area and good mobility of the particles. In this study, the changes induced in biogenic particles by natural sunlight were investigated to understand the phototransformation of the particles in the receiving waters. The results showed that photoexposure resulted in significant decreases in the sizes of the biogenic particles but that photoexposure did not impact the zeta potentials. In addition, the photodissolution of biogenic particulate organic matter(POM) led to the generation of biogenic dissolved organic matter(DOM). Characterization using excitation–emission matrix(EEM) spectroscopy showed that photoexposure changed both the shapes and the intensities of the EEM spectra of the biogenic POM; the regions of the T1 and T2 peaks were susceptible to photoexposure. Modeling by parallel factor analysis(PARAFAC) decomposed the EEMs of the biogenic POM into four valid components, i.e., terrestrial or microbial humic-like substances, tryptophan-like proteins, tyrosinelike proteins and hydrophobic proteins. The humic-like substances in the biogenic POM from the effluents were subject to lower decreases(17.0 % and 11.6 %).Throughout the entire incubation time, the PARAFAC components in the biogenic DOM were dominated by elimination mechanisms rather than by production through photodissolution of the biogenic POM.     

多相光催化氧化法处理焦化废水的研究

以TiO2为催化剂,H2O2为氧化剂,在紫外光照射下采用多相光催化氧化法对焦化废水进行处理,对COD去除率的各种影响因素进行了研究探讨,从而得出其较佳工艺条件．结果表明该法可使焦化厂二沉池废水COD从348．3mg／L降至52．1mg／L,COD的去除率可达85．0％以上。     

氧化塘在露天矿采场水净化处理中的应用

针对宝日希勒露天矿采场水出水水质很差的现实,分析采用多级氧化塘净水工艺净化露天矿采场水。通过深入研究氧化塘净化采场水的机理,参考氧化塘设计参数表,着重对露天矿采场水的多级氧化塘处理单元做出合理设计。多级氧化塘采场水净化系统建成运行后,实践证明采场水出水水质完全达标,采场水净化取得了很好的经济效益,为露天矿采场水净化提供了一种新的经济可行方法。