| 何宝南,何江涛,王健,李杰.顺义潮白河再生水受水区反硝化作用初探[J].农业环境科学学报,2016,35(8):1565-1572. |
| 顺义潮白河再生水受水区反硝化作用初探 |
| Preliminary investigation on the denitrification of reclaimed water intake area of the Chaobai River |
| 投稿时间：2016-03-03 |
| DOI：10.11654/jaes.2016-0268 |
| 中文关键词: 再生水 反硝化 N2:Ar法 N2通量 |
| 英文关键词: reclaimed water denitrification N2:Ar ratio method N2 flux |
| 基金项目:中央高校基本科研业务项目（2012065）；2012环保部公益项目（20120953-2） |
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| 中文摘要: |
| 以顺义潮白河段再生水受水区为研究对象，沿受水区再生水补给路径布设监测点，利用N2：Ar法和膜进样质谱仪（MIMS）直接测定反硝化产物溶解性N2浓度，计算水-气界面N2通量,探究N2通量变化特征和硝酸盐氮沿流向变化的受控因素，概算硝氮转化过程中主要作用的贡献。结果显示：减河段N2通量为8.92～15.20 mmol N2·m-2·d-1，潮白河段N2通量为17.07～33.01 mmol N2·m-2·d-1。NO3--N含量在不同河段的变化主要受控于反硝化作用和浮游植物的同化吸收，其中减河段反硝化作用除氮量和浮游植物同化吸收固氮量分别为0.041 mmol·L-1和0.017 mmol·L-1，分别占NO3--N变化量的68.33%和28.33%；潮白河段为0.254 mmol·L-1和0.125 mmol·L-1，分别占NO3--N变化量的63.50%和31.25%。 |
| 英文摘要: |
| Monitoring points were set along reclaimed water supply path in intake area of the Chaobai River in Shunyi. N2:Ar ratio method and membrane introduction mass spectrometry(MIMS) were used to determine dissolved nitrogen directly, and then N2 fluxes on water-air interface were calculated. Based on these, N2 fluxes changing characteristics and controlling factors of NO3--N changes along the river were investigated, and then contributions of main factors in NO3--N transformation were estimated. The results showed that N2 fluxes in the Jian River and the Chaobai River were 8.92~15.20 mmol N2·m-2·d-1 and 17.07~33.01 mmol N2·m-2·d-1, respectively. Denitrification combined with assimilation of phytoplankton led to variation of NO3--N concentration at different parts of intake area. In the Jian River, nitrogen removal amounts caused by denitrification and phytoplankton were 0.041 mmol·L-1 and 0.017 mmol·L-1, accounting for 68.33% and 28.33% of total NO3--N changes, respectively. In the Chaobai River, the values were 0.254 mmol·L-1 and 0.125 mmol·L-1, accounting for 63.50% and 31.25%, respectively. |
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