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To investigate the pollution levels, occurrence and distribution of estrogens, six estrogens in the surface sediments of Wenyuhe River were analyzed quantitatively by GC/MS following ultrasonicated extraction including diethylstilbestrol, estrone(E1),β-estradiol(E2), 17α-ethynylestradiol(EE2), estriol(E3), and β-estradiol 17-valerate. Six estrogen concentrations ranged from 0.39-36.6ng/g and the mean concentration was 10.2ng/g.

为了调查温榆河沉积物中雌激素物质的污染状况,采用超声萃取、GC/MS法研究了6种常用雌激素(包括己烯雌酚DES、雌酮E1、雌二醇E2、乙炔基雌二醇EE2、雌三醇E3和戊酸雌二醇EV)在北京温榆河上游及干流表层沉积物中的含量水平,并对其分布及来源情况进行了分析。

To study the area crop distribution and the plan disposition analysis indicated that in 21.99 hm2 type area total cultivated area,the current planters beet,the naked oat,the potato,reached the proportion which occupies with the corn and the red kidney bean five crops respectively was 32.93%,36.88%,5.39%,5.61%and 19.19%;Choosed the region symbolic soil fertility target 0~10 cm surface layer soil the physical property clay content to carry on the farmland regionalization altogether to divide into 4 levels:The 1st level, soil physical property clay content>30%;The 2nd level,25~30%;The 3rd level,20~25%; The 4th level,<20%.,Showed that the plots 1~4 the proportion of cultivated land were 3.32 percent and 26.39 percent,32.16 percent and 38.13 percent.

对研究区作物分布与规划配置分析表明,在21.99hm~2样区总耕地面积中,当前种植的甜菜、莜麦、马铃薯、饲用玉米和红芸豆五种作物所占的比重分别为32.93%、36.88%、5.39%、5.61%和19.19%;选择区域标志性土壤肥力指标0~10cm表层土壤的物理性粘粒含量进行农田区划共分为4级:第1级,土壤物理性粘粒含量>30%;第2级,25~30%;第3级,20~25%:第4级,<20%。,表明该样区1到4级耕地所占的比重分别为3.32%、26.39%、32.16%和38.13%。

Little difference of surface sediment grain size was showed between spring tide and neap tide, and the difference of mean diameter was about 9.7%.

表层沉积物大小潮变化较小,两次采样平均差别为9.7%;沉积物年际变化随大通流量和输沙量的变化而变化。

Chemical analysis and toxic tests were combined with benthic macro invertebrates community structure alternations. Based on tri-axial graphs together with relevant matrix of decision-making, the initial bio-responsive sediment quality criteria clearly indicated the situation of heavy metal pollution, and showed the dose-response relationships between heavy metal contamination and benthic biotics. Moreover, the SQC may provide some basic material for establishment of sediment quality standards and for follow-up remediation engineering in the area.

通过将化学分析、毒性鉴定和底栖群落结构变化三基元集成为一体的三轴图和相应的响应信息判断矩阵,基于现场生物响应的沉积物质量基准能较为清晰地指示乐安江流域表层沉积物中重金属污染的相对程度和分布模式,体现底栖生物对沉积物重金属污染的剂量-响应关系,为进一步制订该区域沉积质量管理标准、开展后续的污染治理与恢复工程提供技术保证和科学依据

Chemical analysisC and toxic testsT were combined with benthic macro invertebrates community structure alternationsB. Based on tri-axial graphs together with relevant matrix of decision-making, the initial bio-responsive sediment quality criteria clearly indicated the situation of heavy metal pollution, and showed the dose-response relationships between heavy metal contamination and benthic biotics. Moreover, the SQC may provide some basic material for establishment of sediment quality standardsSQS and for follow-up remediation engineering in the area.

通过将化学分析C、毒性鉴定T和底栖群落结构变化B三基元集成为一体的三轴图和相应的响应信息判断矩阵,基于现场生物响应的沉积物质量基准能较为清晰地指示乐安江流域表层沉积物中重金属污染的相对程度和分布模式,体现底栖生物对沉积物重金属污染的剂量-响应关系,为进一步制订该区域沉积质量管理标准 SQS、开展后续的污染治理与恢复工程提供技术保证和科学依据

It includes the following aspects of the Gulf: regional geology, topography and geomorphy, types and distribution of superficial sediments, regularities of distribution and engineering geological characteristics of Quaternary sediments, bedrock and its structure and existing major engineering geo-environmental problems.

分别对胶州湾周边区域地质,地形地貌,表层沉积物类型与分布,第四系沉积物分布规律,第四系沉积物工程地质特征,基岩与构造和存在的主要工程地质环境问题等进行研究。

The nitrogen and phosphorus in the sediments and interstitial water within 5cm depth gradually decreased along with the root system absorption, and nitrogen and phosphorus release were apparent depressed with the Limnanthemun nymphoides growth.

通过植物根系对沉积物和间隙水中营养盐的直接吸收,使表层(0~5cm)沉积物与间隙水中氮磷营养盐的水平在实验结束后有明显下降,对于控制沉积物内源营养盐释放有重要的作用。

However,different periods were found in middle and bottom waters, due to the influences of tidal induced physical forcings such as resuspension and stratification.

表层叶绿素α浓度、微微型浮游生物和病毒丰度的周日波动呈现典型的半日周期(11-13小时)变化,而中层和底层由于沉积物再悬浮作用和水体层化现象的影响,波动周期与表层明显不同。

The results from the study on characters of phosphorus section distribution show that there are obviously ascending of phosphorus content in the surficial sediments and pore water.

以密云水库为例,研究了水库沈积物中有机质的含量与有机磷的关系,表明表层沈积物中的总有机碳和有机磷的含量都明显高於底层,是由於一些以磷为营养素的富营养化指示藻类在水体中逐年增加,它们死亡后的残骸经分解-矿化后在底积物中累积的结果。

Fe2O3 acts as an activator more than a catalyst in the desulfurization reaction with lime. Fe2O3 acts as the "activation center" around which CaO particles are sulfurized. The new dispersal formation mode of product differs from the compact layer that used to be. And the pore structure of product layer on the surface of lime particles is optimized, which makes SO2 penetrate into core parts of lime more easily. As a result, the desulfurization reaction is developed deeper into the core parts of absorbent.

氧化铁所起的是改变石灰颗粒表层產物生成方式的活化作用,使反应生成物不会形成一个致密的外壳,而以氧化铁为活性中心进行硫化反应,形成了分散的硫酸钙產物堆积,改善了硫化过程中的表面孔隙结构,减少了石灰颗粒表面硫化產物层对反应气体向石灰颗粒內部扩散的阻力。

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