芦苇和蓝藻混合分解对水质的影响

The Influence of the Mixed Decomposition of Phragmites Australis and Algal Bloom on Water Quality

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 8th 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 4th day,which indicated that NH^+4-N was the major component of inorganic nitrogen,accounting for more than 90%.In addition,the concentrations of NO3^--N and NO2^--N kept low level throughout the whole process.