Once the humus layer disappears, nutrients cannot be recycled and leach from the soil, converting soil from fertile to infertile and making it suitable only for savanna vegetation.
一旦腐殖质层消失，养分就无法从土壤中回收和过滤，致使土壤由肥沃变为贫瘠，只适于热带草原植被的生长。
A separate problem may be that some metals or chemicals leach into the brine.
另外一个需要单独加以考虑的问题是，一些金属或者化合物会渗入卤水。
Previously the agency said the trace amounts of BPA that leach out of food containers are not dangerous.
之前这个机构说食物容器中渗出的微量bpa并没有危害。
Dinoflagellates are usually harmless, but can sometimes make toxic chemicals that leach into the tissue of shellfish.
钩鞭藻通常是无害的，但有些时候会产生有毒的化学物质并渗入贝类的组织内。
Nitrates leach from the soil into rivers.
硝酸盐由土壤渗入江河。
Liquid water can leach soluble materials from the interface.
液态水能够从界面溶解出可溶性物质。
Thiobacillus ferrooxidans are used to leach Ni from nicopyrite.
采用氧化亚铁硫杆菌从镍黄铁矿中浸出镍。
The leach solution can be reused after arsenic precipitation with ciml milk.
含砷浸出液经石灰乳沉砷后可返回浸出工序重复使用。
When your diet lacks enough calcium your body will actually leach it from your bones.
当你的饮食中缺乏钙时，你的身体就会从你的骨骼中抽取钙。
Not having plasticizers also means it will not leach out hazardous compounds in the field.
不使用增塑剂，也意味着它不会释放出有害化合物。
Some of them leach their waste into the ground, says Pembina, although how much is uncertain.
彭比纳研究所认为，一些尾矿池中的废水渗入地下，但渗入地下的废水量有多少尚不清楚。
In this paper, studies are made on the impurities control method during leach by adding the additive.
本文研究了在浸出过程中加入添加剂抑制杂质浸出的方法。
Bioleaching is a new technology using microorganism and its oxidizing product to leach useful metals.
细菌浸出法是利用某些微生物及其氧化产物溶浸矿石中的有用金属的一种新工艺。
By Flocculentdeposit ABR -sbr and sand leach, waste water are processed in keeping with the standards.
通过采用絮凝沉淀、ABR反应池、SBR池、砂滤的工艺实现了废水的达标排放。
The idea was that changes to such proteins in brain cells affected by Alzheimer's might leach into the blood system.
他们设想，脑细胞中的这些蛋白在受老年性痴呆影响后发生的变化也会体现在血液中。
Using this model and program the movement of reaction front during in-situ leach mining can be simulated numerically.
应用该模型和程序可以对原地溶浸开采过程中反应前锋的运动进行数值模拟。
It is applied for leaching of ores or concentrates and for the precipitation of metals or oxides from leach solutions.
它用于矿石或精矿的浸出，以及金属或氧化物从浸出液中沉淀出来。
Through this kind of disposal process, heavy metal ions will no longer leach out from NPS under weak acidic conditions.
通过这种处理，在中和沉淀渣的小颗粒上形成完全的铁酸盐包复膜，在弱酸性条件下重金属离子不再浸出。
For example, it remains unclear whether nanoparticles used in food packaging might migrate or leach into food or beverages.
比如，我们迄今还不清楚，食品包装上使用的纳米颗粒是否会渗入食品或饮料中。
The hydrogeology of deposit is one of the most important conditions which decide the feasibility of in-situ leach mining.
矿床水文地质条件是决定一个矿床是否适宜地浸开采的最重要条件之一。
BPA can leach from polycarbonate plastic bottles when it comes into contact with hot liquids and from regular wear and tear.
当聚碳酸酯塑料水壶接触到热的液体和有正常的磨损的时候，其中的BPA就会渗出来。
They leach out into the surrounding soil, which doesn't contain them naturally, indicating how radionuclides might disperse.
这些金属元素渗进原本不含它们的周围土壤中，据此可以表明放射性核素的扩散过程。
The zinc in the separation solution and the leach residue is determined by EDTA titrimetry and atomic absorption spectrometry.
分离后溶液和残渣中的锌采用常规的EDTA容量法或原子吸收光谱法测定。
Spreading wastewater over fields, and allowing it to leach back through the soil into local waterways, turns out to be a reasonable way to purify it.
将废水浇灌到田里，这些水经过土壤的过滤后又重新流回当地的水系，这已经被证明是非常合理的污水净化方法。
Businesses fear that regulation would hamper such use; environmental groups say coal ash is full of toxic metals and tends to leach into groundwater.
企业担心过紧的监管可能会妨碍这类使用；而另一方面，环保组织称煤灰含有大量的有毒金属，会渗透污染地下水。
The dynamic simulations and researches of reaction front would have important significances and application prospects for in-situ leach uranium mining.
反应前锋的动力学模拟与研究在原地溶浸采铀的生产和技术研究中有重要意义和应用前景。
Thermodynamics and technologies of separating gallium and germanium from ferrous powder produced from zinc leach residues were investigated by corrosion process.
研究了用锈蚀法分离浸锌渣还原铁粉中的镓和锗的热力学基础与技术条件。
Soil column method was used to study the characteristics of the movement, transformation, and leach of urea-N in soil added by different ways of the fertigation.
采用室内土柱模拟试验方法，研究了不同灌溉施肥方式下尿素态氮在土壤中的迁移、淋溶和转化特征。
Circuit boards in electronic products contain cadmium, chromium and mercury, all of which are toxic substances that can leach into groundwater if left in a landfill.
电子产品的电路板含有镉、铬和汞，它们都是可以渗透到地下水的有毒物质，如果填埋的话。
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