SYL-01破乳剂的合成及性能测试

在国内外研究的基础上通过实验以MAA、AA、BuAc、MMAc为原料，采用乳液聚合的方法合成了一种新型的不含烷氧基的水溶性W／O原油破乳剂SYL-01。反应条件与反应物的用量研究表明：反应物最佳配比为AA：MAA：BuAc：MMAC＝0．75：0．25：10：4。对原油乳液的破乳实验说明：SYL－01与目前使用的9901破乳剂性能相当，脱水率较高。SYL－01原料价廉易得，不使用易燃易爆的气体原料，工艺简单，有较好的开发应用前景。     

高压容器旋转自紧方法研究

把超速旋转工艺引入高压容器自紧过程，提出旋转自紧方法，并对平面应变问题导出了厚壁圆管在旋转时的弹塑性及塑性极限的应力解和停转后的残余应力解，所得结果表明，由于残余应力的存在而导致了圆管弹性强度极限的提高，达到了自紧的效果。     

应用浮游植物对扎龙自然保护区水质的初步评价

通过对扎龙自然保护区水体中浮游植物调查及运用几种评价公式分析,评价结论为:扎龙水体浮游植物由8门60个属组成,数量在19 515×10~2～23 755×10~3个/升之间;水质属中污染型,同一年度污染情况为:8月>6月,北区>南区。     

Seasonal Variation of Chemical Composition in Fine Particles at Gosan, Korea

PM_2.5 aerosol samples were collected at Gosan in Jeju Island during six intensive measurement periods between November 2001 and August 2003. In order to investigate the chemical composition of fine particles, major ion components, trace elements, and elemental and organic carbon were analyzed. Quite different seasonal characteristic in the chemical composition of fine particles was observed. The concentration of most secondary aerosol components showed a summer minimum and a winter maximum with higher correlation between them at Gosan. This fact clearly reveals the possibility of long-range transport of such pollutants in winter. On the other hand, OC and EC had the highest concentration and good correlation with ion components, such as K⁺, Ca²⁺ in fall. It means that biomass burning could significantly influence the ambient fine carbonaceous particulate in fall, which was primarily long-range transported.     

吹气—吸收法测定废水中硫化物

对吹气－吸收法测定废水中硫化物进行了吸收试验，提出了用去离子除氧水配制硫化物标液，可增加其稳定性；用ＩＳＯ硫化物吹脱器取代普通气吸收装置，可提高硫化物回收率。试验结果表明，改进后方法的精密度，准确度及适用怀强垃令人满意。     

黄河中游水保措施对入黄干支流泥沙特性的影响:Ⅱ.减沙效益分析

应用文献［１］关于不同地貌类型及不同水保措施条件下黄河干支流中泥沙粒径分布的研究结果,可以对相应条件下的减沙效益进行有效的分析。利用文献［１］模型,本文不仅探讨了在给定地貌类型条件下各类水保措施实施前后流域汇入黄河干支流的泥沙总量的变化,而且还在扣除降雨变化的影响之后,预测了各类组合条件下非均匀泥沙中减沙效果最佳的粒径级和相应粒径级泥沙的减沙量,预测结果得到了黄河干支流各站所有实测资料的验证。文中还简要讨论了人类活动（主要是开矿）对减沙效益的影响。     

Impact of land-use types on nitrate concentration and δN in unconfined groundwater in rural areas of Korea

An understanding of the long-term changes in the nitrate contamination pattern of unconfined groundwater is critical to conservation of drinking water in rural areas supporting mixed land-use activities such as cropping, livestock farming, and residence. To examine the effect of different land-use activities on nitrate contamination, groundwater samples were collected monthly for 3 years (1997–1999) from 12 wells in rural areas with different land-use activities and analyzed for the concentrations and N isotopic ratios (δ¹⁵N) of nitrate. The characteristics of nitrate contamination clearly differed with land-use activities. The percentages of samples that had a nitrate concentration exceeding the national standard for drinking water (10 mg N L⁻¹) were 0, 23, 43, and 67% for the uncontaminated natural area, cropping area, cropping-livestock farming complex area, and residential area, respectively. The range of δ¹⁵N values was between +1.4 and +4.5‰ for groundwater nitrate from the uncontaminated natural area. In the cropping area, the δ¹⁵N values were slightly different with the type of fertilizer applied to fields in the vicinity of the well, and the values ranged between +8.7 and +14.4‰ for the compost-applied area and between +4.5 and +8.5‰ for the area where urea was applied with compost. The δ¹⁵N values of the cropping-livestock farming complex area ranged from +1.0 to +17.7‰, probably resulting from mixed contamination sources (inorganic fertilizer and livestock manure). The well located closest to the livestock feedlot had relatively higher δ¹⁵N values, with a range between +8.7 and +17.6‰. In the residential area, a higher δ¹⁵N (most frequently above +10‰) of nitrate suggested that the major source of contamination was effluent from leaky septic tanks. Our data showed that unconfined groundwater is susceptible to land-use activities above the aquifers, and the impacts of the activities could be more precisely inferred from long-term data on the concentration and δ¹⁵N of nitrate. By determining the impacts, more effective (specific to contamination sources) measures for preventing groundwater quality could be implemented.     

抚顺市空气环境容量的测算

在建立空气污染物排放清单的基础上，利用ADMS-城市多元扩散模型，采用城市空气质量管理战略初步成果，测算了抚顺市二氧化硫、颗粒物的容量。     

农用化学品对农产品的污染及其对策

由于农业大量使用化学品 ,使农产品的农药残留量及其衍生物增加 ,从而对人体健康造成具大的危害性。本文的主要目的就是让人们进一步认识在农产品生产中使用农用化学品的危害 ,倡导我国农业走绿色农产品生产的道路     

Selenium status in soils of northern districts of India

The HG-AAS technique was used to estimate the soil selenium status of the agricultural lands of northern parts of India. The drier lands where lesser rains were received or where less irrigation water was available in Rajasthan and southern parts of the Haryana states had above normal soil selenium levels. These soils were also found to be alkaline. Punjab, Himachal Pradesh and northern parts of the Haryana states had normal levels of selenium in their soils, except with slightly lower selenium levels in a few areas that were affected by floods along the river Yamuna. The results were also confirmed using the ICP-OES technique.