铁屑还原－鼓风氧化－石灰凝沉法脱除硫酸生产废水中的砷

比较了硫酸生产废水的几种除砷方法，认为铁屑还原－鼓风氧化－石灰凝沉工艺是可行的，此法具有处理量大、处理效果好、运行费用低等优点。     

地面水中叶枯灵的高效液相色谱测定

本文采用反相高效液相色谱法，在质控条件下，对河水，塘水两种地面水中叶枯灵的检验方法进行了测试，用Shimapck ODS柱为分析柱，以甲醇：水＝50：50为流动相，并用冰醋酸调PH至4－5，紫外检测波长281nm，两种水样的平均回收率分别为91．7－96．3％，90－95．8％，相对标准偏差为4．3％，最低检出限为0．0261mg/l，为地面水中叶枯灵卫生标准的实施提供了简便，灵敏，正确的配套测试手段。     

含氯苯和对邻硝基氯苯农药废水的混凝—氧化预处理

采用混凝沉淀 -芬顿试剂氧化对含氯苯和对邻硝基氯苯农药废水进行预处理 ,探讨了不同条件下农药废水的处理效果。结果表明 ,废水经混凝处理后可去除 46 .2 %的COD ,BOD5/COD值有一定程度的提高 ;废水经芬顿试剂氧化处理后可去除 5 0 .9%的COD ,BOD5/COD值可从 0 .0 4提高到 0 .1     

炼厂隔油后污水的有机构成及混凝处理

采用GC/MS技术分析了炼厂隔油后污水的有机组成,并研究了不同混凝剂处理污水的效果,以及对有机构成的影响。结果表明,隔油后污水中的有机物质主要是C6–C8,其中酚类物质的含量最高;PAM和PAC混凝处理隔油后污水,可使污水中的有机物质总浓度及各物质的相对比例均发生变化,PAM降低烃类物质的效果好于PAC,而后者降低酚类物质的效果好于前者;在PAC处理污水时,同时投加少量活性炭可有效改变PAC脱除COD的性能。     

混凝沉淀-二氧化氯氧化法处理印染废水

介绍了混凝沉淀－ＣｌＯ２氧化法处理印染废水的反应机理,工艺流程,处理效果及经济效益分析。在２个工厂的实际应用表明,该法工艺简单,操作方便,投资少,效果好。     

石灰-聚铁法处理硫酸厂废水的研究

对各种处理硫酸厂废水的方法者了探讨,选择了以百石灰和聚合硫酸铁为药剂去除废水中砷,硫等污染物的方法。该法工艺简单,混凝剂投加量少,运行费用低,处理后的废水可达到排放标准。     

Investigation the effect of adding graphene oxide into diesel/higher alcohols blends on a diesel engine performance

ABSTRACT

This article aims to study the influence of the addition of graphene oxide nanoparticles (GO) to diesel/higher alcohols blends on the combustion, emission, and exergy parameters of a CI engine under various engine loads. The higher alcohols mainly n-butanol, n-heptanol, and n-octanol are blended with diesel at a volume fraction of 50%. Then, the 25 and 50 mg/L concentrations of GO are dispersed into diesel/higher alcohols blends using an ultrasonicator. The GO structures are examined using TEM, TGA, XRD and FTIR. The findings show that there is a reduction in p_max. and HRR when adding higher alcohols with diesel fuel. Regarding engine emission, there is a significant improvement in emissions formation with adding higher alcohols. The addition of GO into diesel/higher alcohols blends improves the brake thermal efficiency by 15%. Moreover, the p_max. and HRR are both enhanced by 4%. The CO, UHC and smoke formation are reduced considerably by 40%, 50 and 20%, respectively, while NO_x level is increased by 30% with adding GO. Finally, adding high percentages of n-butanol, n-heptanol, and n-octanol with diesel fuel with the presence of GO has the potential to achieve ultra-low CO, UHC, and smoke formation meanwhile keeping high thermal efficiency level.     

Exploratory analysis of the safety climate and safety behavior relationship

Problem: Safety climate refers to the degree to which employees believe true priority is given to organizational safety performance, and its measurement is thought to provide an “early warning” of potential safety system failure(s). However, researchers have struggled over the last 25 years to find empirical evidence to demonstrate actual links between safety climate and safety performance.Method: A safety climate measure was distributed to manufacturing employees at the beginning of a behavioral safety initiative and redistributed one year later.Results: Multiple regression analysis demonstrated that perceptions of the importance of safety training were predictive of actual levels of safety behavior. The results also demonstrate that the magnitude of change in perceptual safety climate scores will not necessarily match actual changes (r=0.56, n.s.) in employee's safety behavior.Discussion: This study obtained empirical links between safety climate scores and actual safety behavior. Confirming and contradicting findings within the extant safety climate literature, the results strongly suggest that the hypothesized climate-behavior-accident path is not as clear cut as commonly assumed.Summary: A statistical link between safety climate perceptions and safety behavior will be obtained when sufficient behavioral data is collected.Impact on Industry: The study further supports the use of safety climate measures as useful diagnostic tools in ascertaining employee's perceptions of the way that safety is being operationalized.     

微生物絮凝剂处理造纸中段废水的实验研究

实验从土壤中分离筛选出1株絮凝活性较高的絮凝剂产生菌,经鉴定为1株黑曲霉.采用其产生的微生物絮凝剂M-2处理造纸中段废水,对絮凝条件进行了优化,在最佳絮凝条件下,M-2对造纸中段废水的CODcr去除率可达70.6%,浊度去除率可达91.7%,其絮凝效果优于传统的絮凝剂.     

火电厂FGD装置性能试验有关问题的探讨

针对目前我国还没有专门针对烟气脱硫(FGD)装置性能试验规程的情况,对于火电厂FGD性能试验的内容和标准、现场测量的特点、测点布置和测量方法的选择、试验工况和试验时间的要求等问题,进行了介绍和探讨,以期为脱硫装置性能试验的实践提供一些建议和参考.