Correcting a major error in assessing organic carbon pollution in natural waters
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2021 |
| Auteurs (34) | : | JIAO Nianzhi LIU Jihua EDWARDS Bethanie LV Zongqing CAI R LIU Yongqin XIAO Xilin WANG Jianning JIAO Fanglue WANG Rui HUANG Xingyu GUO Bixi SUN Jia ZHANG Rui ZHANG Yao TANG Kai ZHENG Qiang AZAM Farooq BATT John CAI Wei-jun HE Chen HERNDL Gerhard,j HILL Paul HUTCHINS David LAROCHE Julie LEWIS Marlon MACINTYRE H POLIMENE Luca ROBINSON Carol SHI Quan SUTTLE Curtis,a THOMAS Helmuth WALLACE D LEGENDRE Louis |
| Revue scientifique | : | Science Advances |
| Volume | : | 7 |
| Fascicule | : | 16 |
| Pages | : | |
| DOI | : | 10.1126/sciadv.abc7318 |
| URL | : | http://advances.sciencemag.org/content/7/16/eabc7318.abstract |
| Abstract | : | Microbial degradation of dissolved organic carbon (DOC) in aquatic environments can cause oxygen depletion, water acidification, and CO2 emissions. These problems are caused by labile DOC (LDOC) and not refractory DOC (RDOC) that resists degradation and is thus a carbon sink. For nearly a century, chemical oxygen demand (COD) has been widely used for assessment of organic pollution in aquatic systems. Here, we show through a multicountry survey and experimental studies that COD is not an appropriate proxy of microbial degradability of organic matter because it oxidizes both LDOC and RDOC, and the latter contributes up to 90% of DOC in high-latitude forested areas. Hence, COD measurements do not provide appropriate scientific information on organic pollution in natural waters and can mislead environmental policies. We propose the replacement of the COD method with an optode-based biological oxygen demand method to accurately and efficiently assess organic pollution in natural aquatic environments. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Jiao N, Liu J, Edwards B, Lv Z, Cai R, Liu Y, Xiao X, Wang J, Jiao F, Wang R, Huang X, Guo B, Sun J, Zhang R, Zhang Y, Tang K, Zheng Q, Azam F, Batt J, Cai W-J, He C, Herndl GJ, Hill P, Hutchins D, LaRoche J, Lewis M, MacIntyre H, Polimene L, Robinson C, Shi Q, Suttle CA, Thomas H, Wallace D, Legendre L (2021) Correcting a major error in assessing organic carbon pollution in natural waters. Sci Adv 7 | doi: 10.1126/sciadv.abc7318
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