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Retention characteristics and influencing factors of nitrogen and phosphorus in biofilms around small and micro rivers

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小微河流周丛生物膜氮磷滞留特征及影响因素

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Feb.2026, Vol.49 No.2: 145-150, 259

DOI: 10.3969/j.issn.1003-5060.2026.02.001

Authors

LI Ruzhong, FANG Kejian, ZHANG Rongxing

(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: To reveal the nitrogen and phosphorus retention characteristics of biofilms in small and micro rivers, in situ cultivation observation experiments were conducted to study the absorption effects of ammonia nitrogen $ (\mathrm{NH}_{4}^{+}-\mathrm{N}) $, nitrate nitrogen $ (\mathrm{NO}_{3}^{-}-\mathrm{N}) $, and phosphate $ (\mathrm{PO}_{4}^{3-}-\mathrm{P}) $ in biofilms under environmental background concentration, double background concentration, and quadruple background concentration. The correlation between the nitrogen and phosphorus absorption rate of biofilms in small and micro rivers and environmental impact factors was analyzed. The research results proved the effectiveness of biofilm nitrogen and phosphorus retention in small and micro rivers, quantitatively characterized the nitrogen and phosphorus absorption rate of biofilms in small and micro rivers and its response to nitrogen and phosphorus enrichment level. Correlation analysis showed that the nitrogen and phosphorus absorption rate of biofilms in small and micro rivers was significantly correlated with temperature, pH value, electrical conductivity, and solar reflectance index (SRI). However, with the increase of nutrient enrichment level, the correlation generally showed a downward trend.

Keywords: periphyton biofilms; nitrogen and phosphorus retention; nitrogen and phosphorus absorption rate; small and micro rivers; regulation

作者信息

李如忠，方可健，张荣兴

（合肥工业大学资源与环境工程学院，安徽合肥230009）

摘要和关键词

摘要: 为揭示小微河流周丛生物膜氮磷滞留特征,文章采用原位培养观测实验,开展环境背景质量浓度、2倍背景质量浓度和4倍背景质量浓度情形下周丛生物膜的氨氮 $ \left(\mathrm{NH}_{4}^{+}-\mathrm{N}\right) $、硝态氮 $ \left(\mathrm{NO}_{3}^{-}-\mathrm{N}\right) $和磷酸盐 $ \left(\mathrm{PO}_{4}^{3-}-\mathrm{P}\right) $吸收效应研究,分析周丛生物膜氮磷吸收速率与环境影响因素的相关关系。研究结果证明了小微河流周丛生物膜氮磷滞留的有效性,定量刻画了周丛生物膜氮磷吸收速率及其对氮磷富集水平的响应效应。相关性分析表明,周丛生物膜氮磷吸收速率与温度、pH值、电导率和水面光照强度存在显著相关关系,随着营养盐富集水平的提高,相关性总体呈现下降趋势。

关键词: 周丛生物膜；氮磷滞留；氮磷吸收速率；小微河流；调控

Funding

安徽省自然科学基金资助项目（2308085ME190）

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