填充式电晕法处理二氧化硫的实验研究

主要研究了电晕放电等离子体法处理二氧化硫的效果。通过电晕放电产生大量的氧化性很强的自由基 ,在它们的作用下 ,与二氧化硫发生一系列的物理和化学反应 ,从而达到去除二氧化硫的目的。同时提出加入适当电介质增强放电强度的方法 ,以达到降低成本的目的     

医院污水处理中存在的问题和解决方法

根据对医院污水处理现状，通过对传统医院污水处理方法研究的基础上，对活性污泥法、化学法、二氧化氯消毒法等工艺特点及其在医院污水处理中的应用进行了研究，提出了医院污水处理理想的生化方法。     

混凝与超滤法分离水相TiO2粒子

针对TiO2悬浮粒子的混凝与超滤分离特性进行了试验研究,探讨了各自主要参数条件对分离效率的影响规律。研究表明,超滤不仅可实现TiO2粒子与水的彻底分离,且分离后TiO2催化活性与初次使用相当,因此更适宜于悬浮光催化体系的固液分离及催化剂再用。     

高压环境下2种NDIR型CO_(2)红外传感器的响应规律

目的研究压力变化环境对NDIR型CO_(2)气体传感器的影响,获得不同压力范围内传感器的响应变化规律。方法采用小型加压舱,在CO_(2)分压不变的情况下,分别采用N_(2)阶梯缓慢加压和冲击快速加压方式,研究英国C20和国产G4传感器在高压环境中稳定时间和漂移度等性能指标的波动规律,考察传感器对压力变化的响应规律。结果在低于607950 Pa的高气压稳压状态下,基本不会造成机械损伤,但信号会发生较大的漂移,国产G4分体式传感器出现信号震荡现象。CO_(2)分体式传感器及整机的浓度输出值随着压力的升高,标准气样值与实测值的比值接近幂函数形式,分体式传感器的输出浓度值比整机的输出浓度值要大。结论不同CO_(2)浓度分压下的压力响应规律具有比较良好的一致性,冲击加压的漂移比阶梯加压显著,浓度真值可以通过测量总压和内置多次函数来修正。     

SO2诱导驯化城市污水处理厂氧化沟微生物的多样性分析

对城市污水处理厂氧化沟采集的微生物用低浓度SO2诱导驯化6d以上可培养出脱SO2微生物种群,它们之间相互协同,共同行使着对溶于水中的SO2生化降解的生物学功能,对SO2的生化降解速率高达888mg·（L·h）^-1,1．5h水中的SO3^2-的降解效率〉85％．脱硫菌样品经DNA提取及16SrRNA基因片段的聚合酶链反...     

钛基二氧化铅掺杂电极对附子加工废水的降解研究

采用电沉积法分别制备末修饰、掺杂Bi、Cu和Bi+Cu四种钛基PbO2电极,利用扫描电镜(SEM)对制得的4种电极进行了表征.同时用所制得的电极对附子废水进行降解试验.研究表明Bi+Cu混合掺杂的电极能显著改善钛基PbO2电极的性能,对COD的去除率达到67.73%,对氯离子的去除率也能达到43.20%,而未掺杂电极对...     

二氧化硅复合淀粉材料对染料的吸附性能研究

在交联淀粉存在和弱酸性条件下,使硅酸钠水解生成的二氧化硅与淀粉复合制备了二氧化硅交联淀粉( Sist),通过FT-IR光谱对材料进行了表征,表明反应中形成的二氧化硅与淀粉发生了交联,形成了无机有机复合材料.进一步研究了其对三种不同类型染料的吸附性能.结果表明当硅酸钠添加量为8％时所得的Sist复合材料对染料的吸附性能最...     

Greenhouse gas emissions from oilfield-produced water in Shengli Oilfield, Eastern China

Greenhouse gas(GHG) emissions from oil and gas systems are an important component of the GHG emission inventory. To assess the carbon emissions from oilfield-produced water under atmospheric conditions correctly, in situ detection and simulation experiments were developed to study the natural release of GHG into the atmosphere in the Shengli Oilfield,the second largest oilfield in China. The results showed that methane(CH4) and carbon dioxide(CO2) were the primary gases released naturally from the oilfield-produced water.The atmospheric temperature and release time played important roles in determining the CH4 and CO2emissions under atmospheric conditions. Higher temperatures enhanced the carbon emissions. The emissions of both CH4 and CO2from oilfield-produced water were highest at 27°C and lowest at 3°C. The bulk of CH4 and CO2was released from the oilfield-produced water during the first release period, 0–2 hr, for each temperature, with a maximum average emission rate of 0.415 g CH4/(m3·hr) and 3.934 g CO2/(m3·hr), respectively. Then the carbon emissions at other time periods gradually decreased with the extension of time. The higher solubility of CO2 in water than CH4 results in a higher emission rate of CH4 than CO2over the same release duration. The simulation proved that oilfield-produced water is one of the potential emission sources that should be given great attention in oil and gas systems.     

酸沉降对重庆农业生态的影响

本文阐述了酸雨、酸雾、SO_2等主要酸沉降单独对重庆植物、土壤的作用及其复合作用,提出了今后的研究方向及减少危害的措施。     

Sulfur dioxide-hydrogen peroxide relationships and acidification of precipitation in Guiyang area-a case study

-The concentrations of gas phase SO2, O3 and chemical composition of sequential rainwater samples were measured on 6/11/88 to 6/28/88 at some sites of Guiyang area. S (IV) was present in great excess of H2O2 in rainwater samples collected at residential sites of the city corresponding to high level of gas phase SO2. Considerable H2O2 in rainwater samples was observed in background air at suburbs. The evidence that clean rainwater samples were collected at 20km away from the city in 6/18/88 precipitation event revealed that the major process of acidification of the rain in the high polluted areas was below-cloud scavenging of trace gases. From a simulation calculation it was found that the rate of oxidation of S(IV) by O3 and by Mn2+, Fe3+ catalytic in high pH rainwater is significant, but for low pH the major SO42- is produced by the reaction of S (IV) with H2O2.