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重金属动态
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  “重金属动态”译为未确定词的双语例句
     Study on Heavy Metal Dynamic Distribution Characteristic and Its Pollution Warning
     冶炼工业区重金属动态分布特征与污染预警研究
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  相似匹配句对
     Dynamic news
     动态
短句来源
     DynamicState
     动态
短句来源
     Study of Dynamic Experiment and Mathematical Modelling on Sediment Adsorption of Heavy Metal Pollutant
     重金属污染物动态吸附试验及数学模拟
短句来源
     Dynamic Investigation on Biosorption of Heavy Metal by Waste Sludge
     剩余活性污泥生物吸附重金属动态试验
短句来源
     Contamination Caused by Heavy Metal
     重金属污染
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In order to know the release law of heavy metals and make sure whether it would pollute water, the distribution characteristics of nickel & zinc and their release law were studied. Five forms of that two heavy metals in the sediments were extracted using sequential chemical extraction technique. The results of the experiment indicated that the mainly existence forms of heavy metals in the sediments were metals bound to Fe-Mn oxides and metals hard to dissolve. The amount of exchangeable metals in the sediments...

In order to know the release law of heavy metals and make sure whether it would pollute water, the distribution characteristics of nickel & zinc and their release law were studied. Five forms of that two heavy metals in the sediments were extracted using sequential chemical extraction technique. The results of the experiment indicated that the mainly existence forms of heavy metals in the sediments were metals bound to Fe-Mn oxides and metals hard to dissolve. The amount of exchangeable metals in the sediments was less than other forms. The release law of nickel was the same as that of zinc, but the release capability of nickel was stronger than that of zinc. The sediments had better performance in absorption of heavy metals.

为了解河床沉积物中重金属离子向水体的升迁释放规律.以重金属Ni和Zn为研究对象,采用重金属连续浸提法对2种重金属元素在沉积物中的5种形态进行浸提.分析了其分布特征和重金属动态释放规律.结果表明,在沉积物中Ni和Zn主要以难溶残余态和铁锰氧化物结合态形式存在,可交换离子态存在的质量分数较低;时间对Ni和Zn动态释放的影响基本相同;Ni比Zn有更强的释放能力;沉积物对重金属Ni和Zn有较强的吸附性能.

This paper aims to present the results of the authors' study of the leaching behavior of heavy metals in air pollution control (APC) residues from the urban solid waste (MSW) incinerator through the so-called flow-through column test. It was concluded that the concentrations of heavy metals in the leachate decreased sharply with the increase of cumulative liquid to solid (L/S) ratio at first, and then became relatively stable when the L/S ratio reached 2. Most heavy metals, except Pb, when combined with the...

This paper aims to present the results of the authors' study of the leaching behavior of heavy metals in air pollution control (APC) residues from the urban solid waste (MSW) incinerator through the so-called flow-through column test. It was concluded that the concentrations of heavy metals in the leachate decreased sharply with the increase of cumulative liquid to solid (L/S) ratio at first, and then became relatively stable when the L/S ratio reached 2. Most heavy metals, except Pb, when combined with the integrated wastewater, would reveal a discharge standard lower when the L/S ratio was over 2. Then the paper analyzed the chemical characteristics of the heavy metals in the ash and the remaining ash after leaching by using the sequential extraction procedures. Our results have shown that, Cd and Ni leached from the column was mainly exchangeable and acid soluble; leachable Cu was mainly acid soluble; Cr was almost insoluble, thus less Cr was released from the column test. At the same time, leachable Pb was mainly acid soluble and organically bound. On the other hand, leached Zn was mainly iron oxide occluded. From the sequential extraction procedure for the APC residues, the leach ability order of the heavy metals was Cd > Ni > Cu > Pb > Zn > Cr. Influenced by pH value of the leachate and the mode of liquid and then solid contact, the accumulative quantities of the heavy metals leached from the APC residues proves to be smaller than the values obtained from the international column leaching test. Thus, by the Testing Method Standard for Leaching Toxicity of Solid Wastes, especially for Cr, Hg and Pb, the values obtained from the international column leaching test proves 4.3, 77.5 and 7.0 times than ours.

通过浸出柱实验,研究生活垃圾焚烧飞灰中重金属的动态浸出规律。结果表明,浸出液中各种重金属的质量浓度均随浸取剂与飞灰比值(L/S)增大而减小,并在L/S>2后趋于稳定。除Pb外,浸出质量浓度均低于污水综合排放标准(GB8978—1996)限值。对比原灰与浸出残留物重金属多级提取结果表明,飞灰的重金属在浸出柱实验中释放能力由强到弱依次为:Cd、Ni、Cu、Pb、Zn和Cr。受浸取剂pH值和固液接触方式影响,浸出柱重金属累计浸出量都小于国家标准(GB5086.2—1997)浸出量(Cd除外),尤其Cr、Hg和Pb的浸出柱累计浸出量分别是国标浸出量的23.25%、1.29%和14.29%

In order to assure safety and high quality wheat production and study the effects of heavy metals on different soil types and qualities, the dynamic changes of As, Pb, Hg, Cr and Cd contents were determined in different periods (before sowing, elongation and after harvesting) in field according to different soil types and qualities. The results showed that the average contents determined in soils didn't exceed the criterion of National Standards, the highest contents of heavy metals in soil were gotten during...

In order to assure safety and high quality wheat production and study the effects of heavy metals on different soil types and qualities, the dynamic changes of As, Pb, Hg, Cr and Cd contents were determined in different periods (before sowing, elongation and after harvesting) in field according to different soil types and qualities. The results showed that the average contents determined in soils didn't exceed the criterion of National Standards, the highest contents of heavy metals in soil were gotten during elongation stage, and the effects of elongation stage and after harvesting sample stages on the contents of heavy metals reached the significance level compared with before sowing except Hg. The effects of different soil qualities on the contents of heavy metals didn't reach. The demonstration area in Hebi city was suitable for safety and high quality wheat production. The monitoring on the contents of soil heavy metals should be paid more attentions in elongation stage of wheat.

为监测小麦无公害生产基地的土壤质量保证优质小麦的安全生产,研究不同土壤类型和质地对土壤重金属含量的影响。在大田条件下,研究了不同土壤类型和质地小麦播种前、拔节期和收获期土壤pH值、土壤中重金属砷、铅、汞、铬、镉等重金属的动态变化。结果表明:各项重金属含量的实测值均未超标;土壤重金属含量以拔节期最高;拔节期和收获后与播种前相比,对5种重金属除汞之外的含量影响差异性显著;不同土壤质地对重金属含量的影响差异性不显著。鹤壁市小麦示范区可作为优质小麦安全生产基地,要加强对小麦拔节期土壤重金属含量的监控。

 
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