permanent hardness

简明释义

永久硬度

英英释义

例句

1.To soften the water, we need to install a system that can reduce permanent hardness.

为了软化水，我们需要安装一个可以减少永久硬度的系统。

2.The presence of calcium and magnesium ions contributes to the permanent hardness of the water supply.

钙和镁离子的存在导致了水供应的永久硬度。

3.Boiling water can remove temporary hardness, but not permanent hardness.

煮沸水可以去除临时硬度，但无法去除永久硬度。

4.The water in this region has a high level of permanent hardness, making it unsuitable for washing clothes.

该地区的水具有高水平的永久硬度，使其不适合洗衣服。

5.Using a water softener is an effective way to manage permanent hardness in household water systems.

使用水软化剂是管理家庭水系统中永久硬度的有效方法。

作文

Water is an essential resource for life, and its quality can significantly impact health and the environment. One important aspect of water quality is its hardness, which refers to the concentration of minerals, particularly calcium and magnesium, dissolved in the water. Hardness can be categorized into two types: temporary hardness and permanent hardness. While temporary hardness can be removed by boiling the water, permanent hardness requires more complex treatment methods. Understanding the difference between these two types of hardness is crucial for various applications, including domestic water supply, industrial processes, and agricultural practices.Temporary hardness is primarily caused by the presence of bicarbonate minerals. When water containing these minerals is heated, they precipitate out as scale, making the water softer. This phenomenon is often observed in household settings where kettles or boilers are used. In contrast, permanent hardness arises from the presence of sulfate or chloride compounds of calcium and magnesium. Unlike temporary hardness, it cannot be removed simply by boiling. Therefore, understanding permanent hardness is vital for industries that rely on high-quality water, such as food processing and pharmaceuticals.The implications of permanent hardness extend beyond just water quality; they also affect the efficiency of appliances and machinery. For instance, when water with high permanent hardness is used in washing machines or dishwashers, it can lead to the buildup of limescale. This buildup not only reduces the efficiency of these appliances but also shortens their lifespan. Consequently, many households invest in water softening systems to combat the effects of permanent hardness, ensuring that their appliances function optimally and last longer.Moreover, permanent hardness can have significant environmental impacts. In agricultural settings, water with high permanent hardness can affect soil health and crop yield. High mineral content can lead to nutrient imbalances in the soil, making it challenging for plants to absorb the necessary nutrients. Farmers must monitor water quality closely and may need to implement strategies to mitigate the effects of permanent hardness, such as using chelating agents or selecting crops that are more tolerant to hard water conditions.In conclusion, understanding permanent hardness is essential for managing water quality effectively. It affects not only household appliances and industrial processes but also agricultural productivity. By recognizing the challenges posed by permanent hardness, individuals and organizations can take proactive measures to ensure that water quality meets the necessary standards for health, efficiency, and environmental sustainability. As we continue to face water scarcity and quality issues globally, addressing the complexities of water hardness will become increasingly important.

水是生命的基本资源，其质量对健康和环境有着重要影响。水质的一个重要方面是硬度，它指的是水中溶解的矿物质，特别是钙和镁的浓度。硬度可以分为两种类型：临时硬度和永久硬度。虽然临时硬度可以通过煮沸水来去除，但永久硬度则需要更复杂的处理方法。理解这两种硬度之间的区别对于家庭供水、工业过程和农业实践等各种应用至关重要。临时硬度主要是由碳酸氢盐矿物质的存在引起的。当含有这些矿物质的水被加热时，它们会以水垢的形式沉淀出来，使水变软。这种现象通常在家庭环境中观察到，例如使用水壶或锅炉。相比之下，永久硬度则是由于钙和镁的硫酸盐或氯化物化合物的存在造成的。与临时硬度不同，永久硬度不能仅通过煮沸来去除。因此，了解永久硬度对依赖高质量水的行业至关重要，例如食品加工和制药。永久硬度的影响不仅限于水质；它们还影响设备和机械的效率。例如，当使用含有高永久硬度的水在洗衣机或洗碗机中时，会导致水垢的积聚。这种积聚不仅降低了这些设备的效率，还缩短了它们的使用寿命。因此，许多家庭投资于水软化系统，以应对永久硬度的影响，确保他们的设备正常运转并延长使用寿命。此外，永久硬度可能对环境产生重大影响。在农业环境中，含有高永久硬度的水可能影响土壤健康和作物产量。高矿物质含量可能导致土壤中的营养失衡，使植物难以吸收必要的养分。农民必须密切监测水质，并可能需要实施策略来减轻永久硬度的影响，例如使用螯合剂或选择对硬水条件更具耐受性的作物。总之，理解永久硬度对于有效管理水质至关重要。它不仅影响家庭电器和工业过程，还影响农业生产力。通过认识到永久硬度带来的挑战，个人和组织可以采取主动措施，确保水质达到健康、效率和环境可持续性所需的标准。随着我们继续面临全球水资源短缺和水质问题，解决水硬度的复杂性将变得越来越重要。