Dissertation > Excellent graduate degree dissertation topics show

Repairation Function of Simulated Artificial Wetland Plants to Water Eutrophication

Author: HuoZhangLi
Tutor: WeiXueZhi
School: Shanxi Normal University
Course: Botany
Keywords: Ecological and clean small-watersheds Eutrophication Constructed wetlands Hygrophyte Uptake efficiency
CLC: X52
Type: Master's thesis
Year: 2014
Downloads: 5
Quote: 0
Read: Download Dissertation


Since the21st century, water and soil loss severity of naturalenvironment had basically under control in china, andsolve the problem of food and clothing is not the principalcontradiction in china. With the improving of the living standard,humans’ spiritual culture is increasing and beginning to accept theaesthetic idea of original ecology and close-to-nature. However thewater ecological system had been damaged severely caused byrubbish, waste water, pesticide and chemical fertilizer, whichreleased from industrial and agricultural production. According tothe china’s environmental bulletin2012, the water eutrophication isstill a major environmental problem in china. Therefore, four typesof hygrophyte including Phragmites australis, Scirpus triqueter,Mentha haplocalyx and Oenanthe javanica were selected fromShanxi province to simulate artificial wetland with differentconcentration of eutrophication water. To study the removalability of wetland plant and combination to eutrophication water.Screened out better removal and adapt to local wetland plant andcombination, and give full play to construct clean the ecotypewatershed to remarkably improve ecotope, and give the base toprotect water environment. The results as follows:(1) The four type of plant were grown normal during the experiment. The plant height of Phragmites was variation highest,the average height from24.13cm increased to56.92cm under mildtreatment, from22.21cm increased to58.64cm moderate mildtreatment, and increased by29.86cm under severe treatment.Scripus triqueter was putting out new shoots and Bengalwaterdropwort herb had a thriving root system and the stem wasoverstriking significantly, over90%of Mentha haplocalyx hadflowering during the experiment.(2) The chlorophyll fluorescence parameters showed that theradiation use efficiency of water fennel was increased with theeutrophication aggravated, which could damage plant and affectedphotosynthesis of Menta and Phragmites, as well as Scripustriqueter.(3) Under mild treatment, TP uptake ability of Phragmites andScripus triqueter were higher than the other two plants; Scripustriqueter had the highest COD, TN uptake ability and Menta forNH4+-N. Under moderate treatment, Scripus triqueter had thehighest TP uptake ability and significantly higher than Water fenneland Phragmites(P﹤0.05); Phragmites had the highest TN uptakeability and significantly higher than Water fennel and Menta(P﹤0.05); Menta had the highest NH4+-N uptake ability and Scripustriqueter for COD. Under severe treatment, there was no differencefor TN uptake among the four kinds of plant(P﹥0.05); Scripustriqueter had the highest TP, COD uptake ability and Water fennelfor NH4+-N uptake.(4) Under mild treatment, Phragmites+Scripus triqueter hadhigher uptake ability to TP、TN、NH4+-N than Phragmites+Scripus triqueter+Menta, except to COD. But Phragmites+Scripus+Mentahad significantly higher uptake ability to TP than other three kind ofplant combination under moderate treatment; and Phragmites+Scripus triqueter for NH4+-N. The difference was below5%for TN、COD uptake ability by four kind of plant combination. Under severetreatment, Phragmites+Scripus triqueter had the advantage toremove NH4+-N, Phragmites+Scripus triqueter+Menta and Scripustriqueter+Menta to COD. There had the ideal purifying effect to TPand TN by four kind of plant combination, the difference was lessthan4%.(5) To sum up, the best uptake efficiency of TP and TN in theeutrophic water was Phragmites australis. Mentha haplocalyx andOenanthe javanica had a better uptake efficiency of NH4+-N,Scirpus triqueter had obvious advantages to removal of COD. Plantscollocation may be lead to competition and inhibition of growth,affecting purification effect. May also be due to the concentrationlimit,compared with the single plant,Purification of plantcombinations had no obvious advantage under mild treatment. Butwith the increase of concentration of eutrophication, Purificationadvantages of plant combinations highlighted gradually.

Related Dissertations

  1. The Changes of Microbial Community Along the Different Trophic Gradient of Seawater in Zhanjiang Bay,Q938.8
  2. Responses of Alocasia macrorrhiza to Different Water Stresses and Pollutants Exposures,X52
  3. Study on the Influential Environmental Factors for the Recruitment of Cyanobacteria in the Sediment of Shanzi Reservoir,X524
  4. Qingdao High-tech Zone landscape water eutrophication evaluation,X820
  5. Study on the Purification of Eutrophication Water System by Combination of Physical Materials and Submerged Plants,X524
  6. Disturbance on Growth of Microcystis aeruginosa,X173
  7. Research on the Population Attribute of PFU Protozoan in the Surface Flow Constructed Wetlands and the Effectiveness of Sewage Purification,X703
  8. An Experiment Study on Remedy of Eutrophic Sediment Using Zeolite Capping Technology,X524
  9. Research and Development of Surface Water Quality Prediction Evaluation System-Lakes and Reservoirs Water Quality Prediction Evaluation Module Based on VC++,X824
  10. Study on the Monitoring and Evaluation of Nasi Lake Water Quality Based on Remote Sensing,X87
  11. The Biological Chain Study of Algae Control in the Baiyangdian Lake,X52
  12. Remote Sensing Invervsion of Water Quality Parameters and Trohpic State Assessment in Poyang Lake,TP79
  13. Research on Water Quality Evaluation and Prediction Method for Water Bloom and Its System Implementation in Beijing Lakes,X832
  14. Study on Present Situation and Spatial Distribution Characteristics of Nutrient in Dianchi Lakeside Zone,X524
  15. Jiaozhou Bay Water Environmental Quality Assessment and Pollution Control,X820
  16. Dissovle the Screening and Soluble Algae Bacteria Algae Characteristics,X172
  17. Inhibition Effects of Submerged Macrophytes and Phytoplankton in the Nansi Lake on Microcystis Aeruginosa,X173
  18. Study on the Impact of Main Nutrients as Ca、Mg on Grwoth of Microcystis Aeruginosa,X173
  19. The Relationship between Community Structure of Micro-zooplankton and Eutrophication in Yangcheng Lake,Q958.8
  20. Studies on Characteristics of Dissolved Organic Matter and Organic Nitrogen in Lake Sediments,X524
  21. Application of Hybrid Ecological Technology for Treating Rural Domestic Wastewater,X703

CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control
© 2012 www.DissertationTopic.Net  Mobile