节日里的坏习惯

一到了重要的节日,中国人基本都要烧纸、放鞭炮,我们的传统习惯中,不知不觉制造了许多环境污染。许多人比较尊重传统文化和习惯,而忽略了其中产生的有害气体,不仅危害了自己,同时也危害了他人。     

超稠油污水深度处理工艺技术

针对辽河油田超稠油污水的特点设计了处理工艺流程,进行了药剂的筛选,根据各工艺设备的出水水质要求确定了合适的净水剂、除硅剂、阻垢剂的加量,并进行了现场实际应用,外输出水达到锅炉给水指标要求,用于锅炉注汽使用,效果良好,分析了该超稠油污水处理技术的特点和优势,提出了超稠油污水回用锅炉的建议。     

低碳生活达人

大家知道吗,现在地球妈妈的身体越来越不干净了,还变得十分虚弱了,所以我们要马上行动起来,保护地球妈妈。我想了一个办法:从自我做起,评选"低碳生活达人"。我把这事告诉了爸爸和妈妈,他俩欣慰地笑了,我们家便开始了低碳生活。瞧,现在爸爸很少开车了,因为车子排放的尾     

环保企业集群的优势分析和发展建议

阐述了环保企业集群的定义,分析了环保企业集群的优势,列举了典型范例,给出了环保企业集群发展的建议。     

雪之印象

<正>这个冬天真是地道得很,北半球几乎所有的国家都在下雪。大雪如天使手中曼舞的轻纱,飘洒悠然,覆盖了山脉,封冻了河流,点缀了城乡,染白了大地。大自然用鬼斧神工,雕琢出了雪花,这个季节的精灵。     

东海：经济发展与生态保护共赢——江苏东海走出一条经济社会发展与生态环境保护共赢之路

生态文明建设为东海近年来的高速发展提供了保障,也为新一轮跨越式发展创造了良好的条件并奠定了扎实的基础。增强了城市的综合竞争力,提升了全民的生活品质,推动了社会事业的协调发展。     

稻香·童年·土地

正小时候,我最喜欢的是家门口的稻田了,那种稻子专属的香味,是独一无二的,有时是清香,有时是淡淡的幽香,它们陪我度过了十二个春秋。那时,我还小,不懂事,老是往外跑,不听话,为此让家人伤透了脑筋。有一次,家门口的稻子熟了,我小小的心灵中充满了好奇和欣喜。我大声喊着跑出去,嘴中说:"哈哈,我们家的地里开花了,有天使降临的,天     

论旅游商品的知识产权保护

界定了旅游商品的范围和知识产权的定义。在旅游业发展的现状和现有的法律框架内,阐述了与旅游商品相关的知识产权法知识。用问卷调查和案例评析的方法,分析了我国目前旅游商品存在的问题,论述了知识产权保护对旅游商品开发创新的重要性,提出了旅游商品知识产权保护的思路。     

节约水资源,从我做起

在上周的星期六,由于我没有把水龙头关紧被妈妈发现了,妈妈狠狠教育了我一顿:"孩子,你要节约水资源呀。就算这水是公家的,我们也不能浪费!"我感到很内疚,默默地走到自己的房间,关上门,静静地思考着。过了一会儿,妈妈敲了敲门,进来又说:"以后不要这样浪费水了,下不为例!"     

高职《园林CAD》项目教学的实践应用

介绍了《园林CAD》课程的项目化教学思路,从课程对应岗位群、教学内容的项目化处理、教学设计等3个方面阐述了项目化教学的实践应用。教学实践表明,该方法有效增强了学生学习专业知识的目的性,实现了理论教学和实践教学更好的衔接,有效提高了学生的岗位能力,取得了较好的教学效果,为类似专业课程的教学提供了参考。     

炼油废碱液的综合利用

炼油废碱液是石油加工过程中采用氢氧化钠溶液吸收硫化氢、碱洗油品产生的含硫废碱液和含环烷酸钠废碱液。通过研究 ,综述了炼油废碱液的利用技术主要有熬制工业硫化碱、结晶提取Na2S、废碱液造纸制浆、沉淀法再生废碱液和中和法回收环烷酸等。试验发现 ,Fe2O3、ZnO等沉淀剂对有机硫几乎无脱除效果 ,处理后碱液仍散发出恶臭味。经过大量试验和选择 ,采用CuO作沉淀剂 ,不仅沉淀了S2 - ,而且RS -也得以氧化 ,并发现滤渣对残余有机硫有强烈的吸附作用 ,得到了无色、无臭的再生碱液。     

微波消解-流动注射分光光度法测定土壤中的总磷

采用热效率高的微波消解系统对土壤中的总磷进行消解,建立了微波消解-流动注射分光光度法测定土壤中总磷的方法,该方法对比HJ632-2011碱熔-钼锑抗分光光度法具有快速、简便、节约试剂等特点。本文用两种分析方法对实际土壤样品及标准样品进行定量测定,所得结果表明微波消解法能快速测定大量土壤样品的总磷。     

Management of Lignite Fly Ash for Improving Soil Fertility and Crop Productivity

Lignite fly ash (LFA), being alkaline and endowed with excellent pozzolanic properties, a silt loam texture, and plant nutrients, has the potential to improve soil quality and productivity. Long-term field trials with groundnut, maize, and sun hemp were carried out to study the effect of LFA on growth and yield. Before crop I was sown, LFA was applied at various doses with and without press mud (an organic waste from the sugar industry, used as an amendment and source of nutrients). LFA with and without press mud was also applied before crops III and V were cultivated. Chemical fertilizer, along with gypsum, humic acid, and biofertilizer, was applied in all treatments, including the control. With one-time and repeat applications of LFA (with and without press mud), yield increased significantly (7.0–89.0%) in relation to the control crop. The press mud enhanced the yield (3.0–15.0%) with different LFA applications. The highest yield LFA dose was 200 t/ha for one-time and repeat applications, the maximum yield being with crop III (combination treatment). One-time and repeat application of LFA (alone and in combination with press mud) improved soil quality and the nutrient content of the produce. The highest dose of LFA (200 t/ha) with and without press mud showed the best residual effects (eco-friendly increases in the yield of succeeding crops). Some increase in trace- and heavy-metal contents and in the level of γ-emitters in soil and crop produce, but well within permissible limits, was observed. Thus, LFA can be used on a large scale to boost soil fertility and productivity with no adverse effects on the soil or crops, which may solve the problem of bulk disposal of fly ash in an eco-friendly manner.     

Incomes,Attitudes, and Occurrences of Invasive Species: An Application to Signal Crayfish in Sweden

This article analyzes and carries out an econometric test of the explanatory power of economic and attitude variables for occurrences of the nonnative signal crayfish in Swedish waters. Signal crayfish are a carrier of plague which threatens the native noble crayfish with extinction. Crayfish are associated with recreational and cultural traditions in Sweden, which may run against environmental preferences for preserving native species. Econometric analysis is carried out using panel data at the municipality level with economic factors and attitudes as explanatory variables, which are derived from a simple dynamic harvesting model. A log-normal model is used for the regression analysis, and the results indicate significant impacts on occurrences of waters with signal crayfish of changes in both economic and attitude variables. Variables reflecting environmental and recreational preferences have unexpected signs, where the former variable has a positive and the latter a negative impact on occurrences of waters with signal crayfish. These effects are, however, counteracted by their respective interaction effect with income.     

臭氧消毒中水前后挥发性有机物的GC/MS分析研究

文章研究在不同消毒时间下,臭氧消毒中水前后挥发性有机物的变化。得出:消毒时间30 s和60 s后GC/MS检测有机物的种类较10 s时有明显增多,种类由10 s时的65种增到30 s时的98种,再增到60 s时的101种,最后到3 min时的135种。臭氧消毒法的快速、高效无二次污染、适用范围广。     

Reuse of wastewater for industrial needs: the Pontedera case

This paper presents result from an economic and technical point of view evaluation study, which has sought to establish the potential for replacing well-water that is currently used at the Piaggio industrial plant in Pontedera with recycled wastewater. The study is based upon a pilot wastewater treatment plant, which has been used to test wastewater treatment processes and to compare with achieved quality of recycled waters with that of water drawn on-site from physical/chemical pre-treatment and end with a reverse osmosis and air stripping stage. However, after the physical/chemical pre-treatment, the first option uses oxidation with ozone followed by activated carbon filtration, whereas the second method uses ultrafiltration. The first method is more effective at reducing chemical oxygen demand (COD) whereas the second method is more effective in removing bacteria. Nonetheless, both methods deliver water for re-use of a quality comparable with or better than that of well-water. In principle, the reverse osmosis permeate from either process could be re-used in all production phases at the industrial plant. However, the method base upon oxidation with ozone followed by activated carbon filtration is preferred, because, the process is simpler and continuous. The economic analysis of this process gives an estimated cost of Euro 0.55 per m³ for treated water. This compares favorably with other treatment processes and with the cost of other forms of water supply, which are projected to increase in any case.     

Filtering with a drill pump: an efficient method to collect suspended sediment

Water quality monitoring programs across multiple disciplines use total suspended solids (TSS), and volatile suspended solids (VSS), to assess potential impairments of surface water and groundwater. While previous methods for instream filtering have been developed, the need for rapid, cost‐effective, high volume sampling has increased with the need to verify and supplement data produced by sondes and instantaneous data loggers. We present an efficient method to filter water instream with a portable drill pump that results in reduced sample processing time, and potentially reduced error associated with sample transportation, preservation, contamination, and homogenization. This technical note outlines the advantages of filtering instream vs. in the laboratory. It also compares TSS and VSS concentrations filtered with a drill pump vs. standard filtration methods with a vacuum pump as outlined by USEPA methods 160.2 and 160.4. Samples were collected at 4 sites and filtered in the field, or transported to the laboratory and filtered within 12 or 24 h of collection. Overall TSS and VSS samples filtered instream with a drill pump vs. in the laboratory produced similar concentrations with a similar range in variability for each method. Sample filtering with a drill pump decreased processing time by five minutes per sample.     

样品保存方法对阳极溶出伏安法测定时的影响

对海水中Cu、Pb、Zn、Cd的日常监测分析方法进行了调查,结果表明在调查范围内阳极溶出伏安法使用数量最高。通过实验研究了不添加保存剂、加浓HNO3、加浓HClO4对阳极溶出伏安法测定海水Cu、Pb、Zn、Cd的影响。发现不添加保存剂时4种金属峰电位变化范围大、出现频次分散,分析方法灵敏度下降。不同类型酸对阳极溶出伏安法测定Pb、Zn、Cd时的峰电位变化影响不大,加浓HNO3时Cu的峰电位变化小于加浓HClO4。根据实验结果,推荐使用保存剂为浓HNO3。     

Effective application of ethanol in diesel engines

This work aimed to prove the effects of adding different proportions of ethanol with diesel (DE) and ethanol–water mixture with diesel (DEW) in a single-cylinder diesel engine on the performance, emissions, and combustion parameters. The blends were stabilized by tetra methyl ammonium bromide (TMAB) as the additive. The study was conducted at two operating conditions initially on a normal diesel engine and in the second case the engine piston, valves, and cylinder head coated with zirconia (ZrO₂) alumina (Al₂O₃). The results showed that the addition of 10% ethanol with diesel performed almost equivalent to neat diesel with 29.2% BTE and a 17.7% decrease in smoke and an 11.4% increase in NOx emission at peak load compared to that of the base fuel. Modified engines with thermal barrier coating (TBC) performed superior to normal engines with 4% and 5.5% increase in BTE, respectively, for DE- and DEW-type fuels with reduced exhaust emissions. A 5% addition of water with diesel–ethanol blends favors a higher proportion of ethanol to be employed in diesel engines.     

SPATIAL VARIATION OF PRECIPITATION ON THE TEXAS HIGH PLAINS1

ABSTRACT: Space autocorrelation techniques have been used to reveal the nature and spatial distribution of precipitation in the Texas High Plains. Correlation in precipitation amounts varies with both distance and direction, dropping off rapidly with distance, particularly during the warm season. The analyses can be used to estimate storm characteristics in conjunction with a wide variety of problems dealing with irrigation, crop yields, drainage and water supply, and evaluation of artificial weather modification efforts.