The role of water treatment abstraction in the flux and greenhouse gas emissions from organic carbon and nitrogen within UK rivers FLUVIAL ORGANIC CARBON AND WATER ABSTRACTION
The role of water treatment abstraction in the flux and greenhouse gas emissions from organic carbon and nitrogen within UK rivers FLUVIAL ORGANIC CARBON AND WATER ABSTRACTION
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水处理提取对英国河流中有机碳和氮的通量和温室气体排放的作用 河流有机碳和水提取
DOI：
10.1002/2016wr019362
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发表时间：
2016
影响因子：
5.4
通讯作者：
Finlay N
中科院分区：
文献类型：
--
作者：
Finlay N
有机物通过流域的命运已被证明是全球碳循环的一个重要组成部分，河流中的过程可以迅速将碳从陆地生物圈转移到大气中。然而，没有考虑到取水在从淡水中转移有机物方面的作用。本研究使用了两种方法来估计水处理过程中去除的有机碳量，首先，通过估计必须去除的碳量，考虑到提取量和淡水成分;第二，根据自来水公司水处理残留物的生产和成分报告进行估计。对于英国，通过取水去除的有机碳总量中位数为46千吨C/年，这相当于人均0.76千克C/ca/年的中位数。去除的有机氮总量中位数为4.0千吨N/年，相当于0.07千克N/ca/年。通过取水去除TOC占英国流域总去除率的1.5%。据估计，联合王国河流排放的温室气体在12，754千吨二氧化碳当量/年至32，332千吨二氧化碳当量/年之间，相当于55千吨二氧化碳当量/公里2/年至127千吨二氧化碳当量/公里2/年之间，河流有机物在8，800千吨二氧化碳当量/年至15，116千吨二氧化碳当量/年之间，比例为N2 O：CO2：CH 4 = 6：86：8。进入英国河流网络的1吨有机碳的排放系数的中值为2.95吨CO2当量/年，第5至第95百分位数范围为2.55至3.59吨CO2当量/年。在全球范围内，拥有城市处理水供应的国家的人均值为0.8至0.86千克C/ca/年。
The fate of organic matter through watersheds has been shown to be an important component of the global carbon cycle and processes in rivers can rapidly transfer carbon from the terrestrial biosphere to the atmosphere. However, the role of water abstraction in diverting organic matter from freshwater has not been considered. This study used two methods to estimate the amount of organic carbon removed by water treatment processes, first, by estimating the amount of carbon that has to be removed given the abstracted volumes and the freshwater composition; and, second, estimated from reports of the production and composition of water treatment residuals from water companies. For the UK, the median total organic carbon removed by water abstraction was 46 ktonnes C/yr, this equates to a median per capita value of 0.76 kg C/ca/yr. The median total organic nitrogen removed was 4.0 ktonnes N/yr, equivalent to 0.07 kg N/ca/yr. The removal of TOC by water abstraction represents 1.5% of the total removal rate across UK watersheds. The release of greenhouse gases from UK rivers is now estimated to be between 12,754 and 32,332 ktonnes CO2eq/yr equivalent to between 55 and 127 tonnes CO2eq/km2/yr with fluvial organic matter between 8800 and 15,116 ktonnes CO2eq/yr in the proportion 6:86:8 N2O:CO2:CH4. The emissions factor for 1 tonne of organic carbon entering the UK fluvial network has a median value of 2.95 tonnes CO2eq/yr with a 5th to 95th percentile range of 2.55 to 3.59 tonnes CO2eq/yr. Globally, a per capita values for countries with municipal treated water supply would be 0.8 to 0.86 kg C/ca/yr.