chemical oxygen demand

简明释义

化学需氧量

英英释义

例句

1.The wastewater treatment plant measures the chemical oxygen demand 化学需氧量 to assess the level of organic pollutants.

污水处理厂测量化学需氧量来评估有机污染物的水平。

2.Environmental agencies often monitor chemical oxygen demand 化学需氧量 to ensure water quality standards are met.

环境机构通常监测化学需氧量以确保水质标准得到满足。

3.High chemical oxygen demand 化学需氧量 in a river can indicate contamination from industrial waste.

河流中高化学需氧量可能表明来自工业废物的污染。

4.The chemical oxygen demand 化学需氧量 test is essential for evaluating the effectiveness of treatment processes.

测试化学需氧量对于评估处理过程的有效性至关重要。

5.A sudden increase in chemical oxygen demand 化学需氧量 might signal a pollution event.

在化学需氧量中突然增加可能表明污染事件。

作文

Water is a vital resource for all forms of life on Earth. However, the quality of water can often be compromised by various pollutants, which poses a significant threat to both human health and the environment. One important measure for assessing water quality is the chemical oxygen demand, commonly referred to as COD. The chemical oxygen demand (化学需氧量) is a critical parameter that indicates the amount of oxygen required to oxidize organic and inorganic substances in water. This metric is essential for understanding the level of pollution in water bodies, as it provides insight into the amount of biodegradable material present.COD testing is widely used in wastewater treatment facilities to monitor the effectiveness of treatment processes. By measuring the chemical oxygen demand, operators can determine how much organic matter remains in the water after treatment. A high COD value suggests that the water contains a significant amount of pollutants, which may require further treatment before it can be safely released into the environment.The significance of chemical oxygen demand extends beyond just wastewater management. It plays a crucial role in environmental monitoring, helping to assess the health of rivers, lakes, and other water bodies. For instance, when industrial effluents are discharged into natural waterways, they can lead to an increase in COD levels, indicating potential harm to aquatic ecosystems. Fish and other aquatic organisms depend on clean water; thus, elevated COD levels can result in decreased oxygen availability, adversely affecting their survival.Furthermore, understanding chemical oxygen demand is essential for regulatory compliance. Many countries have established legal limits for COD in discharged wastewater to protect public health and the environment. Industries must adhere to these regulations to avoid penalties and contribute to sustainable water management practices. Regular monitoring of COD levels ensures that industries take responsibility for their impact on water quality.In addition to its role in pollution assessment, chemical oxygen demand also aids in the development of strategies for pollution control. By identifying sources of high COD discharges, policymakers can implement targeted measures to reduce pollution. This could involve promoting cleaner production techniques, enhancing waste treatment technologies, or enforcing stricter regulations on industrial discharges.Moreover, the relationship between chemical oxygen demand and other water quality indicators, such as biological oxygen demand (BOD) and total suspended solids (TSS), is also noteworthy. Understanding these interconnections helps scientists and environmentalists develop comprehensive strategies for improving water quality. For example, a high COD might indicate a corresponding increase in BOD, suggesting that the water is not only polluted but also poses a risk to aquatic life due to oxygen depletion.In conclusion, the chemical oxygen demand is a vital indicator of water quality that serves multiple purposes, from monitoring pollution levels to ensuring regulatory compliance. Its importance cannot be overstated, as it directly impacts the health of our ecosystems and the quality of water available for human consumption. As we continue to face challenges related to water pollution, understanding and managing chemical oxygen demand will be crucial in our efforts to protect this precious resource for future generations.

水是地球上所有生命形式的重要资源。然而，水质往往会受到各种污染物的影响，这对人类健康和环境构成了重大威胁。评估水质的一个重要指标是化学需氧量，通常简称为COD。化学需氧量（化学需氧量）是一个关键参数，表示氧气氧化水中有机和无机物质所需的氧气量。这个指标对于了解水体污染水平至关重要，因为它提供了水中可生物降解物质的数量的洞见。COD测试广泛用于废水处理设施，以监测处理过程的有效性。通过测量化学需氧量，操作员可以确定处理后水中剩余的有机物质的多少。高COD值表明水中含有大量污染物，可能需要进一步处理才能安全释放到环境中。化学需氧量的重要性不仅限于废水管理。它在环境监测中发挥着至关重要的作用，有助于评估河流、湖泊和其他水体的健康。例如，当工业废水排放到自然水道中时，可能会导致COD水平升高，表明对水生生态系统的潜在危害。鱼类和其他水生生物依赖清洁水，因此，COD水平升高可能导致氧气供应减少，从而对它们的生存产生不利影响。此外，了解化学需氧量对遵守法规至关重要。许多国家已制定了废水排放中COD的法律限制，以保护公众健康和环境。工业必须遵守这些规定，以避免处罚并为可持续水管理实践做出贡献。定期监测COD水平确保工业对其对水质的影响负责。除了在污染评估中的作用外，化学需氧量还帮助开发污染控制策略。通过识别高COD排放源，政策制定者可以实施针对性的措施来减少污染。这可能涉及促进更清洁的生产技术、增强废物处理技术或对工业排放实施更严格的法规。此外，化学需氧量与其他水质指标（如生物需氧量（BOD）和总悬浮固体（TSS））之间的关系也值得注意。了解这些相互关系有助于科学家和环保人士制定改善水质的综合策略。例如，高COD可能表明BOD相应增加，表明水不仅受到污染，而且由于缺氧而对水生生命构成风险。总之，化学需氧量是水质的重要指标，具有多重用途，从监测污染水平到确保法规遵从。它的重要性不容小觑，因为它直接影响我们生态系统的健康和人类饮用水的质量。随着我们继续面临与水污染相关的挑战，理解和管理化学需氧量将对我们保护这一宝贵资源以供后代使用至关重要。