芦苇和蓝藻混合分解对水质的影响
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摘要
开展室内模拟实验,探讨芦苇和蓝藻水华混合分解对水质的影响。结果表明:蓝藻藻浆和芦苇混合分解过程中,水质的变化表现出明显的阶段性,0～8天,芦苇和蓝藻分解较快,迅速释放C、N、P元素,第8天水体的TDN、TDP、TOC均达到最大值,分别可达41.88、0.63、294.82 mg/L,8～64天TDN、TDP、TOC总体上呈现下降趋势;混合分解过程中,水体NH~+_4-N浓度在0～32天保持相对较高的水平,第4天L、M、H组最高浓度可达15.6、36.72、41.30 mg/L,32～64天呈现下降趋势;无机氮中NH~+_4-N占有绝对优势,占比大于90%;整个分解过程中,NO~-_3-N和NO~-_2-N都保持较低的浓度。
An indoor simulation experiment was carried out to study the influence of the mixed decomposition of Phragmites australis and Algal bloom on water quality. The results showed that: During the mixed decomposition of Potamogeton malaianus and algal bloom, the water quality showed obivious stages. In the first 8 days, C, N, P were quickly released into the water, the concentrations of TDN, TDP and TOC reached the maximum on the 8 th day, which were 41.88, 0.63 and 294.82 mg/L,respectively, and then presented a downward trend from day 8 to day 64. NH~+_4-N concentration kept on a high level during the mixed decomposition of Potamogeton malaianus and algal bloom in the first 32 days, and then presented a downward trend from day 32 to day 64. the highest NH~+_4-N concentration of group L M H reached 15.6, 36.72 and 41.30 mg/L on the 4 th day, which indicated that NH~+_4-N was the major component of inorganic nitrogen, accounting for more than 90%. In addition, the concentrations of NO~-_3-N and NO~-_2-N kept low level throughout the whole process.
An indoor simulation experiment was carried out to study the influence of the mixed decomposition of Phragmites australis and Algal bloom on water quality. The results showed that: During the mixed decomposition of Potamogeton malaianus and algal bloom, the water quality showed obivious stages. In the first 8 days, C, N, P were quickly released into the water, the concentrations of TDN, TDP and TOC reached the maximum on the 8 th day, which were 41.88, 0.63 and 294.82 mg/L,respectively, and then presented a downward trend from day 8 to day 64. NH~+_4-N concentration kept on a high level during the mixed decomposition of Potamogeton malaianus and algal bloom in the first 32 days, and then presented a downward trend from day 32 to day 64. the highest NH~+_4-N concentration of group L M H reached 15.6, 36.72 and 41.30 mg/L on the 4 th day, which indicated that NH~+_4-N was the major component of inorganic nitrogen, accounting for more than 90%. In addition, the concentrations of NO~-_3-N and NO~-_2-N kept low level throughout the whole process.
引文
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[2] 曹勋. 草藻残体分解过程及其对水质的影响[D]. 南京:南京师范大学, 2015.
[3] 余岑涔,马杰,许晓光,等.太湖近岸带草藻残体分解对水质的影响[J].农业环境科学学报,2018,37(2):302-308.
[4] 刘国锋, 钟继承, 何俊, 等. 太湖竺山湾藻华黑水团区沉积物中 Fe, S, P 的含量及其形态变化[J]. 环境科学, 2009, 30(9): 2520-2526.
[5] Zhang X J, Chen C, Ding J Q, et al. The 2007 water crisis in Wuxi, China: Analysis of the origin[J]. Journal of Hazardous Materials, 2010, 182(1): 130-135.
[6] 曹勋,韩睿明,章婷曦,等.冬季水生植物分解过程及其对水质的影响研究[J].农业环境科学学报,2015,34(2):361-369.
[7] 孙小静, 秦伯强, 朱广伟. 蓝藻死亡分解过程中胶体态磷、氮、有机碳的释放[J]. 中国环境科学, 2007, 27(3): 341-345.
[8] 尚丽霞, 柯凡, 李文朝, 等. 高密度蓝藻厌氧分解过程与污染物释放实验研究[J]. 湖泊科学, 2013, 25(1): 47-54.
[9] Downes M T. Aquatic nitrogen transformations at low oxygen concentrations[J]. Applied and Environmental Microbiology, 1988, 54(1): 172-175.
[10] 徐继荣, 王友绍, 殷建平, 等. 珠江口入海河段DIN形态转化与硝化和反硝化作用[J]. 环境科学学报, 2005, 25(5): 686-692.
[11] 陈重军, 王建芳, 张海芹, 等. 厌氧氨氧化污水处理工艺及其实际应用研究进展[J]. 生态环境学报, 2014, 23(3): 521-527.
[12] Schubert C J, Durisch K E, Wehrli B, et al. Anaerobic ammonium oxidation in a tropical freshwater system (Lake Tanganyika)[J]. Environmental Microbiology, 2006, 8(10): 1857-1863.