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[1]LI Weisi,LI Changhong,XU Bin,et al.Research on Purification Efficiency of Plant Removal and N, P Accumulation from Constructed Wetland[J].Research of Soil and Water Conservation,2018,25(03):250-257,264.

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Research on Purification Efficiency of Plant Removal and N, P Accumulation from Constructed Wetland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 250-257,264 Column: Public date: 2018-04-10

Title:: Research on Purification Efficiency of Plant Removal and N, P Accumulation from Constructed Wetland

Author(s):: LI Weisi^1,3, LI Changhong^1,3, XU Bin^2,3, LI Xiuling³; 1. Linyi Environmental Monitoring Station, Linyi, Shandong 276000, China;
2. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China;
3. College of Life Sciences, Linyi University, Linyi, Shandong 276000, China

Keywords:: constructed wetland; plants; purification efficiency; N; P accumulation

CLC:: Q89;Q143

DOI:: -

Abstract:: Rural domestic sewage has become one of the main sources of agricultural non-point source pollution. According to water characteristics of the runoff in Shandong Province, constructed wetland with multi-series surface flow was used for purification experiment study of simulated and on-the-spot runoff. The purification effects of simulated runoff were compared in different operation phases of constructed wetland with multi-series surface flow. Meanwhile, the variation of the pollutants (COD_Cr, SS, TN, TP, NH₄⁺-N) along the constructed wetland and their removal mechanism were analyzed and discussed, respectively. In the purification study of on-the-spot runoff, removal rates of COD_Cr, SS, TN, TP, NH₄⁺-N followed the order:NH₄⁺-N > COD_Cr > BOD₅ > TN > SS > TP. In the simulated experiment, the most of the pollutants were removed in the front of the constructed wetland. The removal rates gradually decreased with the units. Plant accumulations of nitrogen and phosphorus displayed significantly positive linear correlation with plant biomass and concentrations of nitrogen and phosphorus (p<0.05), and biomass could be used as the indicators to screen appropriate artificial wetland plants. Correlation analysis showed that TP had no significant difference with the other pollution parameters (p>0.05). We established the exponential, the linear, and the quadratic polynomial models which related to the inlet concentration of the wetland system through the monadic linear regression analysis of model coefficients. Then these three models were used for prediction and evaluation on the basis of the other four groups of testing data. Correlation analysis revealed that exponential decay model had the best performance with the smaller relative root-square-error value. The wetland system showed good purification effect during the whole test period, reducing the emissions of nitrogen and phosphorus of rural domestic sewage greatly, and mitigating the damage of domestic sewage to freshwater environment.

References:: [1] Zhi W, Ji G. Quantitative response relationships between nitrogen transformation rates and nitrogen functional genes in a tidal flow constructed wetland under C/N ratio constraints[J]. Water Research, 2014,64:32-41.
[2] Ávila C, Bayona J M, Martín I, et al. Emerging organic contaminant removal in a full-scale hybrid constructed wetland system for wastewater treatment and reuse[J]. Ecological Engineering, 2015,80:108-116.
[3] Ávila C, Matamoros V, Reyes-Contreras C, et al. Attenuation of emerging organic contaminants in a hybrid constructed wetland system under different hydraulic loading rates and their associated toxicological effects in wastewater[J]. Science of the Total Environment, 2014,470:1272-1280.
[4] Shehzadi M, Afzal M, Khan M U, et al. Enhanced degradation of textile effluent in constructed wetland system using Typha domingensis and textile effluent-degrading endophytic bacteria[J]. Water Research, 2014,58:152-159.
[5] Lv T, Zhang Y, Zhang L, et al. Removal of the pesticides imazalil and tebuconazole in saturated constructed wetland mesocosms[J]. Water Research, 2016,91:126-136.
[6] Zhai X, Piwpuan N, Arias C A, et al. Can root exudates from emergent wetland plants fuel denitrification in subsurface flow constructed wetland systems?[J]. Ecological Engineering, 2013,61:555-563.
[7] 周旭丹,孙晓刚,赵春莉,等.人工湿地植被根区土壤性质及其净化水质季节效应分析[J].生态环境学报,2015,24(6):1043-1049.
[8] 董小霞,颜昌宙,王灶生,等.组合式水生植物净化系统对Cu, Pb和Cd的去除与生物富集特征[J].环境工程学报,2014,8(4):1447-1453.
[9] 陈永华,吴晓芙,郝君,等.亚热带地区潜流人工湿地木本植物筛选与净化潜力评价[J].环境科学,2014,35(2):585-591.
[10] 陶敏,贺锋,胡晗,等.碳氧调控下人工湿地净化效果的协同与拮抗研究[J].中国环境科学,2015,35(12):3646-3652.
[11] 刘长娥,宋祥甫,刘福兴,等.潜流-表面流复合人工湿地的河道水质净化效果[J].环境污染与防治,2014,36(8):11-18.
[12] Villasenor J, Capilla P, Rodrigo M A, et al. Operation of a horizontal subsurface flow constructed wetland-microbial fuel cell treating wastewater under different organic loading rates[J]. Water Research, 2013,47(17):6731-6738.
[13] Doherty L, Zhao Y, Zhao X, et al. A review of a recently emerged technology:Constructed wetland-Microbial fuel cells[J]. Water Research, 2015,85:38-45.
[14] Vymazal J, Kr pfelováL. Multistage hybrid constructed wetland for enhanced removal of nitrogen[J]. Ecological Engineering, 2015,84:202-208.
[15] 吴振斌,成水平,贺锋,等.垂直流人工湿地的设计及净化功能初探[J].应用生态学报,2002,13(6):715-718.
[16] 吴振斌,陈辉蓉,贺锋,等.人工湿地系统对污水磷的净化效果[J].水生生物学报,2001,25(1):28-35.
[17] 吴振斌,梁威,成水平,等.人工湿地植物根区土壤酶活性与污水净化效果及其相关分析[J].环境科学学报,2001,21(5):622-624.
[18] 梁继东,周启星,孙铁珩.人工湿地污水处理系统研究及性能改进分析[J].生态学杂志,2003(2):49-55.
[19] 蒋跃平,葛滢,岳春雷,等.人工湿地植物对观赏水中氮磷去除的贡献[J].生态学报,2004,24(8):1720-1725.
[20] 廖新俤,骆世明.香根草和风车草人工湿地对猪场废水氮磷处理效果的研究[J].应用生态学报,2002,13(6):719-722.
[21] 廖新俤,骆世明.人工湿地对猪场废水有机物处理效果的研究[J].应用生态学报,2002(1):113-117.
[22] 朱夕珍,崔理华,温晓露,等.不同基质垂直流人工湿地对城市污水的净化效果[J].农业环境科学学报,2003,22(4):454-457.
[23] 陈进军,郑翀,郑少奎.表面流人工湿地中水生植被的净化效应与组合系统净化效果[J].环境科学学报,2008,28(10):2029-2035.

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