3种耐盐植物对水产养殖废水净化效果Effects of Three Varieties of Halophytes on the Purification of Aquaculture Waste Water
王成强,相智巍,黄炳山,王忠全,王际英,李宝山
摘要(Abstract):
【目的】探究海马齿(Sesuvium portulacastrum)、碱蓬(Suaeda salsa)和江蓠(Gracilaria)等三种耐盐性植物对海水池塘养殖尾水中无机氮、总氮和总磷的净化效果。【方法】每种耐盐性植物设置3个密度梯度,每个梯度3个重复,实验周期为12d,分析不同密度下单一品种对石斑鱼养殖尾水的处理效果。【结果】不同密度耐盐植物对水质修复有不同效果,其中1.5 g/L海马齿处理组、1.5 g/L碱蓬处理组和1.6 g/L江蓠处理组在单一处理实验中表现出较佳净化效果,对总氨氮(TAN)、亚硝酸盐氮(NO2--N)和硝酸盐氮(NO3--N)的去处率分别为80.49%、70.28%和76.06%,73.39%、52.44%和74.38%,30.30%、31.24%和54.08%。对比发现,在对无机氮的去除率方面,1.6 g/L江蓠处理组对NO3--N的去除率显著高于其他两组,对NO2--N的去除率也显著高于1.5g/L碱蓬处理组(P <0.05),而与1.5 g/L海马齿处理组无显著差异(P> 0.05)。同时,1.6 g/L江蓠处理组对总氮(TN)和总磷(TP)的去除率均显著高于1.5 g/L碱蓬处理组和1.5 g/L海马齿处理组(P <0.05)。在实验进行10 d后,高密度处理组的三种盐生植物对TN和TP的去除率明显降低。【结论】1.6 g/L江蓠处理组、1.5 g/L海马齿处理组和1.5 g/L碱蓬处理组表现出较佳的养殖废水净化效果,其中1.6 g/L江蓠处理组效果最佳。
关键词(KeyWords): 海马齿;碱蓬;江篱;耐盐植物;养殖废水;氮磷营养盐;去除率;水质净化
基金项目(Foundation): 烟台市科技计划项目(2020MSGY067);; 山东省海洋生态修复重点实验室开放课题(201911);; 海洋生物资源的开发与利用项目(220-0110-JBN-54EY)
作者(Author): 王成强,相智巍,黄炳山,王忠全,王际英,李宝山
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