查询词典 heavy water

With the use of Precipitable Water Vapor data from GPS, analyses were performed to study the features of water vapor transport in a heavy rain case that occurred during the late summer of 2004 in Shanghai.

本文应用GPS探测的可降水水汽资料Pwv对上海地区2004年一次夏末暴雨的水汽输送特征进行了分析。

The AVS-SEM distribution in the sediments of Guanting Reservoir and Yongding River was studied and the metal concentration in the water above the sediments and the pore water was measured. Based on the results, the reaction between the sediments and metal ions were discussed and the heavy metal pollution of the sediments in Guanting Reservoir and Yongding River was evaluated preliminarily.

官厅水库沉积物，由于处于缺氧性环境，沉积物中的酸可挥发性硫化物控制着大多数金属离子在沉积物和孔隙水两相间的分配，本文通过现场采样，分析了官厅水库和永定河沉积物中的AVS—SEM的分布，同时测定了沉积物上覆水以及部分样点的孔隙水中的重金属浓度，探讨了沉积物与重金属离子的作用；并根据采样分析结果对官厅水库及永定河沉积物中的重金属污染做了初步评价。

The sediment of water body is the main carrier of heavy metal elements, their contents reflect the environmental quality in the water system.

水体沉积物是重金属元素的重要载体，其含量高低能够反应水系环境质量状况。

The results of study on enrichment of heavy metal Pb2+ in water show that the water can be purified by Alternanthera philoxeroides.

水花生对水体中重金属Pb2+的富集作用研究表明，重金属Pb2+浓度为5mg／L，pH为7.0-8.0 (pH为7.5最佳)，处理温度为25℃-30℃(温度25℃最佳)时；在处理时间为7d以后，水花生净化Pb2+可以达到低于国家标准所允许排放的最高浓度0.2mg／L

Add 200g per ton water of this product into boiler make-up water. During operation, blow-off every hour, 5-10 second each time. If the boiler has heavy scale, increase the quantity, and frequently blow-off. After 10-20 days' continuous operation, stop the boiler, open the handhole, remove the visible scale deposit to prevent conduit blockage, then, the boiler may turn into normal operation again.

按每吨水加200g药剂的比例加入锅炉补充水中即可，使用时注意排污，要求每小时排污一次，每次5～10秒，如锅炉带垢运行可加大药剂用量，勤排污，运行10～20天后应停炉，人工把脱落下的水垢清理干净，防止污垢堵塞管道，然后转入正常运行。

Add 200g per ton water of this product into boiler make-up water. Duringoperation, blow-off every hour, 5-10 second each time. If the boiler has heavy scale, increase the quantity, and frequently blow-off. After 10-20 days' continuous operation, stop the boiler, open the handhole, remove the visible scale deposit to prevent conduit blockage, then, the boiler may turn into normal operation again.

按每吨水加200g药剂的比例加入锅炉补充水中即可，使用时注意排污，要求每小时排污一次，每次5～10秒，如锅炉带垢运行可加大药剂用量，勤排污，运行10～20天后应停炉，人工把脱落下的水垢清理干净，防止污垢堵塞管道，然后转入正常运行。

For society and mankind but durative development, our country is in " 15 " during plan to throw 270 billion RMB to control water pollution, among them one important is river, river, laky processing, and the agent killing alga that its processing technique is a tradition more again, heavy alga agent, garrulous coagulates the method such as the dredge that agent and whole nation use generally, confirm through practice, afore-mentioned methods cannot administer the pollution of river, lake effectively not only, and often accentuate or transfer water pollution 2 times.

为了社会和人类的可持续性发展，我国在&十五&期间拟投入2700亿人民币控制水污染，其中重要的一项就是江、河、湖泊的治理，而其处理方法又多为传统的杀藻剂、沉藻剂、絮凝(使液体中悬浮微粒集聚变大或形成絮团，从而加快粒子聚沉，达到固-液分离的过程)剂及全国普遍采用的疏浚等方法，经过实践证实，上述方法不仅不能有效地治理河、湖的污染，而且往往加重或二次转移水污染。

The factor analysis showed that the resuspension of mud and sand and salinity caused by river runoff and the mixture of fresh and salt water was the main reason of the variation of heavy metal content in the Huanghe estuary water.

主成分分析表明，河水流量的大小和咸淡水的混合导致的泥沙的再悬浮和盐度影响到河海混合过程及河口重金属的浓度变化趋势。

Compared of the efficiency of treating heavy metals in FGD wastewater with NaOH, Ca_2 and Mg_2. It indicated that NaOH was much efficient for precipitated waste water; Ca_2 was much efficient for unprecipitated waste water, the removal efficiency reached 98.4%. With the increasing of the main ion of Ca~2+, Cl~- in FGD wastewater, the efficiency decreased. It decreased 60% for the removing of Mn and 10% for Zn, Cd and Ni. The rectification coefficient token the Ksp of practical wastewater because it quite different with theoretic Ksp at different pH; the theoretic and practice addition were proportioned and it commonly reached 1:300.The precipitation efficiency of Na2S at different pH and the effect of Ca2+ was determined.

比较了NaOH、Ca_2和Mg_2处理脱硫废水时重金属的去除效果，分析了Ca~(2+)、SO_4~(2-)和Cl~-等主要离子的影响，结果表明：NaOH和Ca_2能有效处理脱硫废水中的重金属；对澄清废水而言，NaOH效果较好，对于未澄清废水而言，Ca_2效果更好，但去除废水中重金属的效率都能达到98.4%；随着Ca~(2+)、Cl~-等主要离子浓度的增大，中和作用去除重金属的效率降低，Mn最大降低60%，Zn，Cd，Ni降低10%左右；实际重金属浓度和用理论Ksp计算所得值差别很大，通过校正系数能有效计算实际重金属浓度；实现相同pH时氢氧化物的理论和实际投加量成一定比例，最大可达1：500。

1 Prior to any mechanical cleaning, all surfaces shall be thoroughly cleaned with a water-based biodegradable cleaner (such as Carboline surface cleaner No. 3 or Devprep 88 heavy duty cleaner) to remove all oil, grease and foreign matter followed by a thorough water wash.

在任何机械处理之前，所有表面都应该用水基可进行生物降解的清洁器（如Carboline第3 号表面清洁器或 Devprep 88重型清洁器）来去除所有油脂和异物，接下来用水冲洗透。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。