摘要
选取表面流人工湿地和垂直潜流人工湿地为研究对象,通过露天实验研究了不同湿地类型对复合污染水体中营养盐和PFOS的去除效果.结果表明,3种湿地对复合污染水体中营养盐和PFOS均具有较好的去除能力,且不同湿地类型对各污染物的去除效果有所差异.高浓度(100μg·L^(−1))PFOS抑制风车草生长,SFCW植物PFOS含量达到的实验最高值,为(181.93±8.28)μg·g^(−1);低浓度(1μg·L^(−1))PFOS促进了风车草的生长,VFCW2植物总生物量达到的实验最高值,为(1130.33±36.98)g;VFCW2对营养盐和PFOS的去除表现最优,在高浓度(100μg·L^(−1))PFOS下,PFOS去除率仍然可达95.87%-99.86%;低浓度(1μg·L^(−1))PFOS强化了VFCW1和VFCW2对NH_(3)-N的去除,去除率分别为60%-65%和68%-72%.PFOS的去除主要取决于人工湿地的土壤吸附和植物吸收,SFCW、VFCW1和VFCW2土壤PFOS吸附占比分别为(50.86±1.23)%-(56.32±2.35)%、(62.13±2.23)%-(75.28±3.01)%和(64.71±3.56)%-(76.96±1.98)%,均高于植物PFOS吸收占比(7.51±0.66)%-(35.84±2.36)%.
The study selected the surface flow constructed wetland and vertical subsurface flow constructed wetland as research object.Removal effects of different wetland types on nutrients and PFOS in compound polluted water were studied through open-air experiments.The results show that the three wetlands have good removal capacity of nutrients and PFOS in compound polluted water,and the removal effects of different wetland types were different.High concentration(100μg·L^(−1))PFOS inhibited the growth of windmill grass,and the PFOS content of SFCW plants reached the highest in the experiment,which was(181.93±8.28)μg·g^(−1).Low concentration(1μg·L^(−1))PFOS promoted the growth of windmill grass,and the total biomass of VFCW2 reached the highest in the experiment,which was(1130.33±36.98)g.VFCW2 was the best in the removal of nutrients and PFOS.Under high concentration(100μg·L^(−1))PFOS,the removal rate of PFOS could still reach 95.87%-99.86%.Low concentration(1μg·L^(−1))PFOS enhanced the removal of NH_(3)-N by VFCW1 and VFCW2,with removal rates of 60%-65%and 68%-72%respectively.The removal of PFOS mainly depended on the soil adsorption and plant absorption of constructed wetland.The proportion of soil PFOS adsorption of SFCW,VFCW1 and VFCW2 was(50.86±1.23)%-(56.32±2.35)%,(62.13±2.23)%-(75.28±3.01)%and(64.71±3.56)%-(76.96±1.98)%,which were higher than that of plant PFOS absorption(7.51±0.66)%-(35.84±2.36)%.
作者
石旻飞
张瑞斌
黄珺
SHI Minfei;ZHANG Ruibin;HUANG Jun(Zhejiang Industry Polytechnic College,Shaoxing,312000,China;School of the Environment,Nanjing University,Nanjing University,Nanjing,210046,China;Shaoxing Sci-Tech Museum,Shaoxing,312000,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第8期2834-2842,共9页
Environmental Chemistry
基金
国家水体污染控制与治理科技重大专项(2018ZX07208010)
浙江省教育厅科研项目(Y202146935)资助.
关键词
人工湿地
复合污染水体
营养盐
全氟辛烷磺酸
constructed wetland
compound contaminated water
nutrients salts
PFOS
