水质中化学需氧量的检测数据

化学需氧量是衡量水体受污染严重程度的一个重要指标，在水体质量监测以及水域生态环境保护方面起着十分重要的作用。化学需氧量的测定是水域生态环境质量管理的一个重要参考指标，有利于促进水域生态环境实现全过程质量管理，为政府监管、居民生活以及生态环境提供参考和技术支撑。通过对区里某一街道各采样点位采样的水质中化学需氧量的检测，依据水质化学需氧量的测定重铬酸盐法 HJ828-2017，根据硫酸亚铁铵标准溶液的浓度C（mol/L）数值，再记录空白试验所消耗的硫酸亚铁铵标准溶液的体积V0（ml）减去水样测定所消耗的硫酸亚铁铵标准溶液的体积V1（mL）的数值乘以8000的摩尔质量，除以取样采集到的水样体积V（mL），得到的总数据再乘以样品稀释倍数f得出水质中化学需氧量的数值，公式如下：化学需氧量CODcr={【C*（V0-V1）*8000】/V}*f。通过国家分类标准GB 3838-2002表得出最后的结论判断，水中化学需氧量检测的结论分为4类，III是三类水，含量≤20mg/L，IV是四类水，含量20-30mg/L，V是五类水，含量30-40mg/L，超过V的标准值（＞40mg/L）就是劣五类水则是不合格。水在我们生活中占有重要的地位，要长久维系其水环境功能和人民健康，对各类污染源进行综合治理是首要任务。本数据可以为监管部门靶向监管、污水处理、居民生活提供技术支撑。

Chemical Oxygen Demand (COD) is a critical indicator for evaluating the severity of water body pollution, and plays a vital role in water quality monitoring and aquatic ecological environment protection. The determination of COD serves as an important reference index for the quality management of aquatic ecological environment, which helps to promote the whole-process quality management of aquatic ecological environment, and provides reference and technical support for government supervision, residents' daily lives and ecological environment protection. Through the detection of COD in water samples collected from various sampling points in a street of a certain district, according to the Dichromate Method for the Determination of COD in Water Quality (HJ828-2017), the COD concentration of water samples can be calculated as follows: first, obtain the concentration C (mol/L) of ammonium ferrous sulfate standard solution, subtract the volume V1 (mL) of ammonium ferrous sulfate standard solution consumed in water sample determination from the volume V0 (mL) consumed in blank test, multiply the resulting difference by 8000, divide the product by the collected water sample volume V (mL), then multiply by the sample dilution factor f to get the final COD concentration. The formula is: CODcr={[C*(V0-V1)*8000]/V}*f. Based on the national classification standard GB 3838-2002, the COD detection results are divided into 4 categories: Class III water with COD ≤20 mg/L, Class IV water with 20 mg/L < COD ≤30 mg/L, Class V water with 30 mg/L < COD ≤40 mg/L, and water with COD >40 mg/L is classified as inferior Class V water, which is deemed unqualified. Water plays an important role in daily life. To sustain its aquatic environmental functions and public health in the long term, comprehensive management of various pollution sources is a top priority. This dataset can provide technical support for regulatory authorities to carry out targeted supervision, wastewater treatment and residents' daily lives.

搜集汇总

数据集介绍

特点

该数据集记录了水质中化学需氧量的检测数据，采用重铬酸盐法测定，包含27条记录，适用于水体质量监测和生态环境保护。