摘要
2020年6月30日至9月1日,采用16种模拟污水方案、4级污染水平、5种污染指标的正交实验方法,配制模拟含盐污水,将其作为进水,注入种植多枝柽柳(Tamarix ramosissima)的模拟人工湿地中,每隔16 d监测一次水样中的总溶解性固体、总氮、总磷、铅元素和镉元素的含量,研究种植多枝柽柳的模拟人工湿地对污水中总溶解性固体、总氮、总磷、铅元素和镉元素的去除率及其与总溶解性固体、总氮、总磷、铅元素和镉元素的含量的交互影响;分别于实验开始和实验结束时测量了多枝柽柳的株高和茎粗,分析了导致其变化的影响因素。研究结果表明,种植多枝柽柳的模拟人工湿地对氮中污染和重污染的污水中总氮的去除率相对较大,实验前期模拟人工湿地对污水中总氮的去除效果很好(去除率大于90%),实验后期模拟人工湿地对污水中总氮的去除效果一般(去除率为43.18%和60.70%);在实验的各个阶段,模拟人工湿地对磷中污染和重污染的污水中总磷的去除效果都非常理想,总磷的去除率都大于91%;在实验的前16 d,模拟人工湿地对铅轻污染和中污染的污水中的铅元素的去除率都达到了100%;在实验的后48 d,模拟人工湿地对铅重污染的污水中的铅元素的去除率都大于94%;在实验的前16 d,模拟人工湿地对镉轻污染的污水中的镉元素的去除率都达到了100%;在实验的后48 d,模拟人工湿地对镉重污染的污水中的镉元素的去除率都大于97%;在16种污水方案条件下,多枝柽柳株高增加量为13.40~68.54 cm,茎粗增加量为0.64~3.90 cm;污水中的总溶解性固体含量是总氮、总磷、铅元素和镉元素去除率以及多枝柽柳株高和茎粗变化的最主要影响因素。
From June 30 to September 1, 2020, 16 simulated effluent scenarios, 4 levels of pollution and 5 pollution indicators were adopted to prepare simulated saline effluent, which was injected into the simulated constructed wetlands planted with Tamarix ramosissima as influent water. Monitoring the contents of total dissolved solids, total nitrogen, total phosphorus, lead and cadmium elements in water samples at 16-day intervals to study their removal rates from effluent by simulated constructed wetlands planted with Tamarix ramosissima and their interaction with the contents of total dissolved solids, total nitrogen, total phosphorus,lead and cadmium elements. The plant heights and stem thicknesses of Tamarix ramosissima were measured at the beginning and end of the experiment, and the influence factors were analyzed. The results of the study showed relatively high removal rates of total nitrogen from moderately-and heavily-polluted effluent with nitrogen by simulated constructed wetlands planted with Tamarix ramosissima. Specifically, the removal rate of total nitrogen from the effluent by the simulated constructed wetland was very good in the early stage of the experiment(more than 90%), and good in the later stage of the experiment(43.18% and 60.70%). At all stages of the experiment, the simulated constructed wetlands were very effective in removing total phosphorus from both moderately and heavily polluted effluent with phosphorus, with total phosphorus removal rates greater than 91%. In the first 16 days of the experiment, the simulated constructed wetlands achieved 100% removal of lead element from both lightly and moderately contaminated effluent with lead;in the second 48 days of the experiment, the simulated constructed wetlands achieved more than 94% removal of lead element from heavily contaminated effluent with lead;in the first 16 days of the experiment, the simulated constructed wetlands achieved 100% removal of cadmium element from lightly contaminated effluent with cadmium;in the second 48 days of the experiment, the simulated constructed wetlands achieved more than 97% removal of cadmium element from heavily contaminated effluent with cadmium. Under 16 effluent scenarios, Tamarix ramosissima height increased by 13.40-68.54 cm and stem thickness by 0.64-3.90 cm;the content of total dissolved solids in the effluent was the most important factor influencing the removal rate of total nitrogen,total phosphorus, lead and cadmium element, as well as the change in the plant height and stem thickness of Tamarix ramosissima.
作者
廖明晶
范敬龙
匡代洪
孙磊
李雪
王文全
LIAO Mingjing;FAN Jinglong;KUANG Daihong;SUN Lei;LI Xue;WANG Wenquan(College of Grassland and Environmental Science,Xinjiang Agricultural University,Urumqi 830052,Xinjiang Uygur Autonomous Region,P.R.China;Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830076,Xinjiang Uygur Autonomous Region,P.R.China)
出处
《湿地科学》
CSCD
北大核心
2021年第6期715-725,共11页
Wetland Science
基金
新疆维吾尔自治区重点研发计划项目(2017B03014-3)
新疆维吾尔自治区土壤与植物生态过程重点实验室项目资助。
关键词
多枝柽柳
人工湿地
含盐污水
总溶解性固体
总氮
总磷
重金属
Tamarix ramosissima
constructed wetland
saline sewage
total dissolved solids
total nitrogen
total phosphorus
heavy metal
