青年群体对传统绿色生态文化回归的影响研究

传统方法对青年群体绿色生态文化回归的影响分析中,存在青年群体分析影响片面,影响分析计算准确率较低的问题。为此提出青年群体对传统绿色生态文化回归的影响与思考。通过勒布朗斯回归数学影响方程确定影响因子,建立青年群体主观因子与客观因子之间的动态关联;采用大数据分析,构建大数据影响因子数据分析模型;依托绿色生态文化回归影响算法,从而完成青年群体对传统绿色生态文化回归的影响分析。该影响分析方法比传统方法平均准确度提升3.55倍,且能够实现青年群体对传统绿色生态文化回归的影响分析。     

废水中硝基苯类化合物测定方法的探讨及新方法研究

探讨了废水中硝基苯类化合物的气相色谱法测定方法中的水样预处理操作繁琐,实验耗时长,且萃取时使用易挥发有毒有害的有机物二氯甲烷。另一种常见的测定方法还原-偶氮分光光度法,而染料、印染制革等工业废水的颜色较深,对测定造成干扰,通常通过蒸馏预处理消除水样颜色带来的干扰,而在蒸馏过程中因硝基苯类沸点较高不能将水样中的硝基苯类化合物全部蒸出,导致检测结果偏低。提出了一种经聚己内酰胺脱色,简单又快捷地消除水样中颜色的干扰,又避免了硝基苯类化合物蒸馏不完全的问题,再利用还原-偶氮分光光度法准确测定废水中硝基苯类化合物的方法。     

湿地植被对污水净化效果分析研究

人工湿地植被种植对污水净化具有显著性的改善作用,分析人工湿地植被种植与污水净化的量化关系,分析人工湿地植被种植对污水改善的原理,建立生态植被污水净化处理模式,采用多元回归分析方法人工湿地植被对水质控制和小型富营养水体生态恢复的效益因素,以营养物的去除率、重金属的去除率以及有机物去除率为指标,分析人工湿地植被种植对污水净化的生态学改善模型。研究表明,人工湿地植被种植能增加水体透明度,降低水体中的富营养物和重金属等物质,对污水具有显著性的改善作用。     

A study on the interactions among several plant secondary compounds and aphids

The research, focused on the specific interactions among seven plant secondary compounds and aphids, was carried out and the preliminary results showed: (1) "T-typed tube method" was regarded as the best method compared with others designed to observe the interactions. (2) Cabbage aphid was able to be attracted by laurolene while it was not susceptible to α-pinene, β-pinene and diamylene. (3) Gossypol, a major secondary substance in cotton, was able to be implicated as feeding attractant to cotton aphid. (4) Rutin might be implicated repellent to cotton aphid.     

青铜峡铝厂氟污染对广武乡玉米影响的调查分析

监测了青铜峡铝厂东南方向４．５ｋｍ的广武乡玉米叶，得知含氟量为４３．９４－１６６．１ｍｇ／ｋｇ，对照样品树新林场玉米叶的含氟均值为１３．１５ｍｇ／ｋｇ，广武乡的玉米受到了严重的氟污染，农作物减产严重。     

Determination of PAHs by On-Line Polarization Synchronous Fluorescence with HPLC

A novel analytical method has been established for on-line simultaneous determination of fluorene and acenaphthene,chrysene and benzo[a]anthracene (B[a]A) by polarization synchronous fluoromet.y (PSF) coupled to high performance liquid chromatography (HPLC). The detection limits were: 0.039, 0.046, 0.016 and 0.042 mgL-1 for fluorene, acenaphthene, chrysene and B[a]A, respectively. The proposed method has been successfisily applied to simultaneous determination of these PAHs in environmental air and marine sediment samples.     

Determination of Trace Organochlorinated Pesticides and Polychlorinated Biphenyls in Water

A modified steam distillation liquid-liquid extraction (SDE) device is developed for the enrichment of trace organochlorinated pesticides (OCPs) and polychlorinated biphenyls (PCBs) in up to one litre of water samples. One ml of n-hexane is sufficient to extract the analytes. The extract can be analysed directly by a capillary gas chromatography-electron capture detector. The recoveries range from 84.6 to 102.3% for OCPs and 80.5 to 106.2% for PCBs, respectively. Matrice materials such as lipids and humic substances were removed by the SDE method from the extract and no further cleanup and concentration steps were needed.     

博斯腾湖水质矿化度模型及预测研究

根据博斯腾湖１９８５～１９９５年水质监测数据和出入湖水量等水文数据观测值，采用水质扩散模型和盐量平衡关系推导出博斯腾湖大湖区（简称博湖）水质矿化度模型，并预测了几种情况下博湖水质矿化度及近几年变化趋势，分析了影响博湖水质矿化度的主要因素，为博湖的近期和远期环境保护规划、环境管理等提供科学依据．     

Preliminary studies of a fast screening method for polycyclic aromatic hydrocarbons in soil by using solvent microextraction-gas chromatography

Solvent microextraction (SME) was applied to the extraction of polycyclic aromatic hydrocarbons (PAHs) from spiked and real environmental soil samples with different matrices. Soil sample was mixed with 7 mL of acetone and 14 mL of water to allow partitioning of the PAHs from the soil to the liquid phase. A 2 microL octane drop suspended from a microsyringe needle tip was then immersed into the stirred solution-soil mixture for extraction. After an 11 min extraction, the octane drop was withdrawn into the syringe and injected directly into the GC for identification and quantification. The whole analysis procedure took 27 min, with an extraction time of 11 min, and a GC separation time of 16 min. A second extraction could be undertaken whilst the GC is running, hence the GC run time currently limits the sample throughput. In this method, a small amount of organic solvent was used for the extraction process, which produced little waste. The limits of detection for lower molecular weight (< 230) PAHs range from 0.13 to 0.36 mg kg-1, and for higher molecular weight (> 250) PAHs are estimated to be between 0.5 and 1.0 mg kg-1, with RSD values generally under 20%. Due to the small volumes of organic solvent used, the consumable cost per extraction is only US$ 0.12. This is the first report of the application of SME to solid samples, and the first report of the use of SME for the analysis of PAHs.     

某铀矿工人头发中总α,总β,铀,钍放射性水平的调查

本文对某铀矿职业工人和非职业工人头发中的总β、总α放射性水平和铀、钍含量进行了分析测定.结果表明,该矿工人体内铀和钍的蓄积量均在正常放射性本底水平范围内,从头发中检验未观察到工人体内铀、钍放射性水平有明显的升高.