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供水管网“有色水”问题的分析与控制措施 被引量:1
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作者 徐洪福 尤作亮 汪义强 《供水技术》 2007年第3期38-41,共4页
城市供水管网中出现的"有色水"是化学不稳定的出厂水与金属管道长时间直接接触,导致金属管道腐蚀并释放腐蚀产物而形成的。控制"有色水"必须抑制水与管道之间的相互作用,主要途径有改造水处理工艺提高出厂水的化学... 城市供水管网中出现的"有色水"是化学不稳定的出厂水与金属管道长时间直接接触,导致金属管道腐蚀并释放腐蚀产物而形成的。控制"有色水"必须抑制水与管道之间的相互作用,主要途径有改造水处理工艺提高出厂水的化学稳定性,降低其腐蚀性;避免金属管道裸露与水直接接触;优化管网水力工况条件,降低水在管道内的停留时间,消除死水区域。工程实践证明,上述方法能够有效控制供水管网中的"有色水"问题。 展开更多
关键词 管网 有色水 管道腐蚀 化学稳定性
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伏安极谱法同时检测有色企业工业生产用水中的锌、镉、铅、铜四种离子
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作者 杨君梅 赵有刚 +2 位作者 贾殿双 李颖 文沅琦 《世界有色金属》 2023年第13期136-138,共3页
有色企业工业生产用水样品采用吸附溶出伏安极谱仪的悬汞模式(HMDE),使用标准加入法进行检测,Zn、Cd、Pb、Cu这四种元素的检出限均能达到10ng/L,回收率分别为:Cu:100.6%;Zn:100.8%;Cd:92.70%;Pb:104.0%。本研究开辟了在水分析领域中电... 有色企业工业生产用水样品采用吸附溶出伏安极谱仪的悬汞模式(HMDE),使用标准加入法进行检测,Zn、Cd、Pb、Cu这四种元素的检出限均能达到10ng/L,回收率分别为:Cu:100.6%;Zn:100.8%;Cd:92.70%;Pb:104.0%。本研究开辟了在水分析领域中电化学方法检测有色企业工业生产用水中痕量重金属残留的新途径。 展开更多
关键词 有色企业工业生产用 伏安极谱法
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离子色谱法测定油田有色地层水中的碳酸根和碳酸氢根 被引量:15
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作者 蔡青松 刘霞 +1 位作者 蒋生祥 金彦博 《分析测试技术与仪器》 CAS 2002年第3期165-169,共5页
针对油田有色地层水中碳酸根和碳酸氢根含量的测定 ,建立了一种间接光度非抑制离子色谱法 .优化了固定相和流动相条件 ,发现碳酸盐碳的总量和碳酸氢根峰高在 0 .2 4~ 12mmol L范围内具有良好的线性关系 .对油田有色地层水进行了测定 。
关键词 测定 油田 离子色谱法 有色地层 碳酸根 碳酸氢根 质分析
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有色金属矿山重金属废水深度处理技术研究 被引量:7
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作者 李福勤 王鹏 +2 位作者 杨晓松 马宝丽 李艳芳 《工业水处理》 CAS CSCD 北大核心 2013年第9期20-22,共3页
为满足某有色金属矿山重金属废水深度处理要求,采用树脂材料吸附法进行深度处理技术研究,结果表明:D402型树脂对Pb(Ⅱ)、Cd(Ⅱ)有很强的吸附能力,原水Pb(Ⅱ)为1 180μg/L、Cd(Ⅱ)为670μg/L时,在温度298 K、pH=6.0、流速16.8 m/h的条件... 为满足某有色金属矿山重金属废水深度处理要求,采用树脂材料吸附法进行深度处理技术研究,结果表明:D402型树脂对Pb(Ⅱ)、Cd(Ⅱ)有很强的吸附能力,原水Pb(Ⅱ)为1 180μg/L、Cd(Ⅱ)为670μg/L时,在温度298 K、pH=6.0、流速16.8 m/h的条件下,单周期Pb(Ⅱ)、Cd(Ⅱ)分别达标可通过水样为6 800 BV和2 100 BV,混合水样达标通过量为1 900 BV,出水满足《地表水环境质量标准》(GB 3838—2002)Ⅲ类水标准的要求。 展开更多
关键词 有色金属矿山重金属 树脂 吸附 再生 深度处理
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辐射聚合制备有色吸水树脂 被引量:1
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作者 邵赛 邓钢桥 +4 位作者 刘德林 张一扬 金龙新 李青峰 张跃龙 《化工文摘》 2005年第6期39-40,42,共3页
采用^(60)Co-60γ射线引发辐射聚合,合成了有色高吸水树脂,考察了辐射剂量、剂量率、颜料对吸水树脂品质的影响。
关键词 有色树脂 辐射聚合
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利用消费品包装做流体实验箱
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作者 胡米宁 《实验教学与仪器》 1994年第10期19-19,共1页
1 箱体的制作 用木板做成长55cm、宽35cm的普通木箱,箱盖上的面板必须嵌在推糟里,需要时可抽出反插。将两根长约80cm的“一次性输液器”塑胶管分别做成U型管固定在箱盖面板的反面。一根注入有色水,一根注入水银(注入水银的U型管只能固... 1 箱体的制作 用木板做成长55cm、宽35cm的普通木箱,箱盖上的面板必须嵌在推糟里,需要时可抽出反插。将两根长约80cm的“一次性输液器”塑胶管分别做成U型管固定在箱盖面板的反面。一根注入有色水,一根注入水银(注入水银的U型管只能固定一端。 展开更多
关键词 流体实验 压强计 一次性输液器 消费品 箱盖 有色水 U型管 簿膜 反插 注入
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神秘的无底洞
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作者 佚名 《语文世界(上旬刊)》 2004年第6期48-48,共1页
关键词 塑料粒 汹涌的海 有色水 地球 美国地理学会 地壳浅部 地核 石灰岩地区
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注射器在自然实验教学中的应用
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作者 孙启林 《中小学实验与装备》 1995年第2期22-22,共1页
注射器在自然实验教学中的应用钟祥市双河镇小学孙启林(431900)1.证明大气有压力,可这样使用注射器。在一烧瓶瓶口塞上带有双孔的橡皮塞子,在塞子上插两根管子(要密封好),将一根管子经一段胶管与注射器连通,把烧瓶口朝... 注射器在自然实验教学中的应用钟祥市双河镇小学孙启林(431900)1.证明大气有压力,可这样使用注射器。在一烧瓶瓶口塞上带有双孔的橡皮塞子,在塞子上插两根管子(要密封好),将一根管子经一段胶管与注射器连通,把烧瓶口朝下,将另一根管子插进水槽里,这时抽... 展开更多
关键词 注射器 自然实验 教学中的应用 注射器活塞 有色水 钟祥市 不同方向 大气压力 橡皮塞子
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Observation of Mitosis and Meiosis in Rice Cells by Simple Squash Method 被引量:1
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作者 杨旭 代西梅 《Agricultural Science & Technology》 CAS 2009年第5期96-99,共4页
[Objective] The aim of this study was to establish a feasible squashing technique for chromosome and obtain data of rice chromosome. [Method] With the materials of rice root tips and anther, the specimen was prepared ... [Objective] The aim of this study was to establish a feasible squashing technique for chromosome and obtain data of rice chromosome. [Method] With the materials of rice root tips and anther, the specimen was prepared by the modified squash method, and microscopic observation of mitosis and meiosis in rice cells was also carried out. [ Result] Mitosis in rice cells included interphase, prophase, metaphase, anaphase and telophase. Chromosome in metaphase shortened to the minmum, which was a good time for observing and investigating chromosome. However, meiosis in rice cells included meiosis Ⅰ and meiosis Ⅱ. Chromosome replication appeared in meiosis Ⅰ, while cell division only appeared in meiosis Ⅱ. [ Conclusion] The modified squashing technique for rice chromosome can obtain accurate data of rice chromosome, which provides evidence for genetic breeding. 展开更多
关键词 RICE CHROMOSOME Squashing method MITOSIS MEIOSIS
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Eco-friendly synthesis of high silica zeolite Y with choline as green and innocent structure-directing agent 被引量:6
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作者 Dawei He Danhua Yuan +2 位作者 Zhijia Song Yunpeng Xu Zhongmin Liu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第1期52-59,共8页
Zeolite synthesis in contemporary chemical industries is predominantly conducted using organic structure‐directing agents(OSDAs),which are chronically hazardous to humans and the environment.It is a growing trend to ... Zeolite synthesis in contemporary chemical industries is predominantly conducted using organic structure‐directing agents(OSDAs),which are chronically hazardous to humans and the environment.It is a growing trend to develop an eco‐friendly and nuisanceless OSDA for zeolite synthesis.Herein,choline is employed as a non‐toxic and green OSDA to synthesize high silica Y zeolite with SiO2/Al2O3 ratios of 6.5–6.8.The prepared Y zeolite samples exhibited outstanding(hydro)thermal stability at ultrahigh temperature owing to the higher SiO2/Al2O3 ratio.The XRF,SEM,29Si‐NMR and 13Na+results suggested that choline plays a structure‐directing role in the synthesis of Y zeolite,while the feed molar fraction of Na+is a crucial determinant for the framework SiO2/Al2O3 ratio and the crystal morphology. 展开更多
关键词 Zeolite synthesis FAU zeolite High silica Green organic structure‐directing agent (Hydro)thermal stability
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DECOMPOSITION OF BLACK LIQUOR BY ULTRASOUND PROCESS 被引量:3
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作者 WUXiaohui ZHOUShan LUXiaohua 《Chinese Journal of Reactive Polymers》 2004年第1期22-28,共7页
Ultrasound (US)-induced cavitation is an effective way in oxidizing organic contaminants in wastewater either as the independent operation unit or in combination with other oxidation methods. In this paper, black liqu... Ultrasound (US)-induced cavitation is an effective way in oxidizing organic contaminants in wastewater either as the independent operation unit or in combination with other oxidation methods. In this paper, black liquor and filtrate after acidifying and settling were sonicated. The effect of working parameters on ultrasonic degradation of black liquor, such as different combination methods, frequency, power supply, initial concentration, pH, duration time, ionic strength and catalyst were studied. The results were as follows: (1) At the conditions of 40kHz, 100W, 4h, pH at 6 and temperature 30?℃, utilizing US/US-H2O2/US-Fenton, weak-orange filtrate turned to colloid with the increase of time and little sediment produced after settling. Especially filtrate came to be milk white collides and upper water approached to nearly achromatic by US-Fenton. Compared with the US, US-H2O2/US-Fenton COD (Chemical oxidation demand) removal ratio can increase 15%, 30% respectively. Because of more hydroxyl radicals produced in the reaction process; (2) At the condition of 100W and 4h, the degradation efficiency of black liquor was better at 40kHz over at 20kHz. Moreover black liquor can be biodegraded easily. Those based on that the big molecule of contaminants in aqueous solution can be changed into the little molecule with ultrasound (3) At the condition of 40kHz and 4h, the COD removal ratio of black liquor was more higher at 60W than at 80W, while the removal ratio of COD at 60W was nearly close to the ratio at 100W; (4) The initial concentration of black liquor influenced the effect of sonochemical degradation; (5) The variation of pH had no effect on degradation; (6) The longer the duration time, the greater the removal ratio of COD. But this ratio increased slowly after 4h; (7) Adding 0.2g/L NaCl to change the ionic strength of the black liquor, the COD removal ratio can increase 10%; (8) The degradation rates increased by the coexistent catalysts of TiO2, Co2+ and Ag+. 展开更多
关键词 Ultrasound (US) Black liquor DEGRADATION Different combination methods.
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Assessment of the Total Organic Carbon and Conductivity in Consecutive Dyeings with Reactive Dyestuffs Using Treated Effluent by UV/H202 Photocatalysis
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作者 Leite Adilson da SilvaI Barco Luiz +4 位作者 Trindade Nelson Barros Araujo Mauricio de Campos Rosa Jorge Marcos Tambourgi Elias Basile Santana José Carlos Curvelo 《Journal of Chemistry and Chemical Engineering》 2014年第2期139-144,共6页
The paper was monitored the conductivity (g.L"l of NaCI), the absorbances values (Abs) and the amount of TOC (total organic carbon), before and after five consecutive dyeings made with reuse water, obtained fro... The paper was monitored the conductivity (g.L"l of NaCI), the absorbances values (Abs) and the amount of TOC (total organic carbon), before and after five consecutive dyeings made with reuse water, obtained from treated effluent by UV/H202 photocatalysis. All rates of decolorization were above 92%, the removal of total organic carbon was above 89% in all treatments and the economy of NaCI was from 3.10 in the first recipe, 3.17 in the second, 3.49 in the third, 3.79 in the fourth and 4.05 in the fifth recipe. The five dyeings compared with same dyeings made with deionized water presented a color deviation (AE*) below 1. The conventional dyeings would consume 80 L/kg against 40 L/kg used in the dyeing process proposed in this study, representing a great economy of water, with no discharge of effluents. 展开更多
关键词 CONDUCTIVITY reactive dyestuffs reuse of water PHOTOCATALYSIS textile effluent.
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有孔纸片托水
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作者 王丽娟 《小学生生活》 2007年第1期40-40,共1页
思考:有孔的纸为什么能托住水?材料:瓶子一个、大头针一个、纸片一张、有色水一满杯。操作:1.在空瓶内盛满有颜色的水;2.用大头针在白纸上扎许多孔;3.把有孔纸片盖住瓶口:4.用手压着纸片,将瓶倒转,使瓶口朝下;5.将手轻轻移开,纸片纹丝... 思考:有孔的纸为什么能托住水?材料:瓶子一个、大头针一个、纸片一张、有色水一满杯。操作:1.在空瓶内盛满有颜色的水;2.用大头针在白纸上扎许多孔;3.把有孔纸片盖住瓶口:4.用手压着纸片,将瓶倒转,使瓶口朝下;5.将手轻轻移开,纸片纹丝不动地盖住瓶口,水也不会从孔中流出来。 展开更多
关键词 大头针 瓶口 有色水 大气压强 表面张力 小孔 倒转 白纸 中流
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两色花
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作者 胡柚 《小学生时代》 2003年第Z1期77-77,共1页
关键词 玻璃管 有色水 花瓣 色花 毛细管 原理分析 实验过程 输送 玻璃杯
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神奇的科学小实验
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作者 Michio Goto 方长勇 《新东方英语(中学版)》 2008年第4期53-55,共3页
利用家中常见物品,一起变身小科学家,来做做神奇的科学小实验吧!将两个同样的杯子注满水。往一个杯中加入两汤匙盐并搅拌均匀;另一个杯中加入几滴食用色素。在装着有色水的杯子上盖一张纸,然后把它倒过来,扣在装着盐水的杯子上。(做这... 利用家中常见物品,一起变身小科学家,来做做神奇的科学小实验吧!将两个同样的杯子注满水。往一个杯中加入两汤匙盐并搅拌均匀;另一个杯中加入几滴食用色素。在装着有色水的杯子上盖一张纸,然后把它倒过来,扣在装着盐水的杯子上。(做这个实验时。 展开更多
关键词 小实验 有色水 实验原理 科学家 空气膨胀 气球 垃圾袋 蜡烛 吸入
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