草原地区河流型天然湿地对河流水体污染物去除特性

任耀宗; 刘国; 余红; 杨天学; 吴有兵; 许秋瑾; 庞燕; 李东阳; 李琦

doi:10.12153/j.issn.1674-991X.2018.12.290

草原地区河流型天然湿地对河流水体污染物去除特性

doi: 10.12153/j.issn.1674-991X.2018.12.290

任耀宗^1,3,
刘国^1,,
余红^2,3,,
杨天学²,
吴有兵⁴,
许秋瑾²,
庞燕²,
李东阳²,
李琦²

^1. 地质灾害防治与地质环境保护国家重点实验室,四川成都 610059
^2. 中国环境科学研究院,国家环境保护地下水污染模拟与控制重点实验室,北京 100012
^3. 北京师范大学水科学研究院,北京 100875
^4. 华能甘肃能源开发有限公司,甘肃兰州 730070

详细信息

作者简介:
任耀宗(1992—),男,硕士研究生,研究方向为环境污染与控制技术, 2468107889@qq.com;

中图分类号: X522
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- 被引次数: 0
出版历程
- 收稿日期: 2018-09-07
- 刊出日期: 2019-03-20

Removal characteristics of pollutants by riverine natural wetland in prairie region

^1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China
^2. State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
^3. College of Water Science, Beijing Normal University, Beijing 100875, China
^4. Huaneng Energy Development Co., Ltd. In Gansu, Lanzhou 730070, China

摘要

摘要: 为阐明草原地区河流型天然湿地对主要污染物总磷(TP)、总氮(TN)和化学需氧量(COD)的去除效果,以海拉尔河湿地为研究对象,通过2010—2015年湿地入水口(陶海断面)和出水口(磋岗断面)水体TP、TN浓度和COD变化,分析不同月份湿地对水体TP、TN和COD的去除效果,并对污染物去除机理进行探讨。结果表明:陶海断面水体TP、TN浓度和COD变异系数分别为0.51、0.73和0.39,磋岗断面水体TP、TN浓度和COD变异系数下降至0.36、0.43和0.38,海拉尔河湿地对水体TP、TN和COD的去除率分别为26.67%、20.90%和8.74%,目前湿地入水TP、TN和COD负荷尚未超过其饱和净化能力;受融雪水和夏雨带来的地表径流的影响,海拉尔河湿地在5月和8—9月对水体TP、TN的去除率较低,在地表径流作用弱的1—3月、10—12月去除率较高;海拉尔河湿地对TP的去除在融雪期主要为生物同化及土壤吸附作用,在冰冻期主要为土壤吸附和沉淀作用,对TN的去除在融雪期主要为硝化与反硝化作用及生物同化作用,在冰冻期主要为底泥吸附作用,生物同化作用次之,对COD的去除主要是微生物降解和土壤吸附作用等。
- 草原地区 /
- 河流型湿地 /
- 污染物 /
- 去除效果 /
- 海拉尔河
Abstract: In order to clarify the removal effects of total phosphorus (TP), total nitrogen (TN) and chemical oxygen demand (COD) in river-type natural wetlands in the grassland, the Hailaer River wetland was studied. The changes of TP, TN and COD in the inlet (Taohai section) and the outlet (Cuogang section) during 2010-2015 were analyzed. The removal effects of TP, TN and COD in wetlands in different months were analyzed, and the mechanism of pollutant removal was discussed. The results showed that the coefficients of variation of TP, TN and COD in the Taohai section were 0.51, 0.73 and 0.39, respectively, and in the Cuogang section were reduced to 0.36, 0.43 and 0.38. The removal rates of TP, TN and COD in Hailaer River wetland were 26.67%, 20.90% and 8.74%, respectively. At present, the load of TP, TN and COD in wetland inflow had not exceeded their purification capacity. During the snowmelt period (May) and summer rain period (August to September), the wetland had lower removal of TP and TN . During the weak surface runoff period (January to March, October to December), the TP, TN and COD were highly removed. The removal of TP by wetland was mainly by bio-assimilation and soil adsorption during ice-thaw period, and by soil adsorption and precipitation during freezing period. The removal of TN by wetland was mainly by nitrification and denitrification and biological assimilation in ice-melting period, followed by sediment adsorption and biological assimilation in freezing period. The removal of COD in wetlands was mainly due to microbial degradation and soil adsorption.
- prairie area /
- riverine natural wetland /
- pollutant /
- removal effect /
- Hailaer River

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