Dissertation > Excellent graduate degree dissertation topics show

Oil-contaminated Soil Repair by Plants-microbial Technology in Northern Shaanxi

Author: LinLiNing
Tutor: NieMaiZuo
School: Xi'an University of Architecture and Technology
Course: Environmental Engineering
Keywords: petroleum hydrocarbons oil pollution bioremediation N source, P source bio-surfactant
CLC: X53
Type: Master's thesis
Year: 2009
Downloads: 467
Quote: 3
Read: Download Dissertation

Abstract


With increasing the extent of oil pollution in northern Shaanxi, how to repair the oil-contaminated soil is a serious problem. Because of its good ecological and economic benefits, bioremediation is the preferred method. In the Paper, for the characteristics of drought in northern Shaanxi, studying bioremediation technology about oil-contaminated soil, lays a good foundation on bioremediation of actual contaminated-oil soil in northern Shaanxi.In this paper, on the basis of mixed good bacteria in the pre-degradation of petroleum hydrocarbons, in an outdoor pot experiment conditions, the test is used the fine mixed flora suiting for oil-contaminated soil in northern Shaanxi, and plants which are suitable for the fragile ecosystem and drought areas in northern Shaanxi, taking some methods such as joining the N source, P source and bio-surfactants, and optimize the degradation of petroleum hydrocarbons, in order to provide technical support on remediation of actual contaminated-oil soil in northern Shaanxi. The following findings:（1）In the case of micro-organisms in the absence of plant, the degradation rate of petroleum hydrocarbons is better than the condition of micro-organisms alone. Degradation effect of petroleum hydrocarbons of the two combinations which are Medicago sativa + JQ1 + JQ2 and Coronilla + JQ1 + JQ2 are better. 30d time, the degradation rates of petroleum hydrocarbon are 43.4% and 43.8% respectively.（2）Adding nitrogen and phosphorus nutrients can significantly strengthen the microbial degradation of petroleum hydrocarbons. For the P source in K2HPO4, the degradation rate of the two combinations ofMedicago sativa + agents in the case of added NH4Cl and Coronilla + agents in the case of added NH4NO3, are 45.1% and 47.1% respectively.In the degradation process of petroleum hydrocarbons, the supply of nutrients has a certain balance. About adding N source, P sources, there are a reasonable amount of the economy and the added.proportion. Under the ratio of C:N:P=360:6:1, the degradation of petroleum hydrocarbon of the two combinations of Medicago sativa + agents and Coronilla+ agents is maximum and degradation rates are 50.8% and 52.3% respectively.（3）Adding biological yield crude surfactant contributes to microbial degradation of petroleum hydrocarbons, but the volume is not better and is appropriate to 15ml. Under adding 15ml bio-surfactant crude production, the degradation rates of the two combinations of Medicago sativa + JQ1+ JQ2+ NH4CL + K2HPO4 and Coronilla + JQ1+ JQ2+ NH4NO3 + K2HPO4, reach 60.15% and 60.79% respectively.（4）In the joint process of micro-organisms phytoremediation of oil-contaminated soil, the germination rate of plants, biomass, the proportion of root and cap and microbial diversity in the soil are used to evaluate the effect of bioremediation of contaminated soil. In the papers, the results have a certain significance means on bioremediation of actual oil-contaminated soil in northern Shaanxi, and have laid a solid foundation to start the actual repair work.

Related Dissertations

  1. Study on the Legal System of Compulsory Liability Insurance in Pollution from Ship,D922.294
  2. Combined Remediation Effect of Plant with Microorganisms in Pahs-Contaminated Soils,X53
  3. Bioremediation of petroleum hydrocarbon contaminated soil,X53
  4. Study on Interface Properties of Synthesized Glycolipids and Their Mixed Membranes with DPPE,TB383.2
  5. White rot fungi on PAHs adsorption and biodegradation of biological repair,X172
  6. Filter Performance Test System,TH137
  7. Study on the Effects of Eco-toxicity of Petroleum-Contaminated Soil on Plants Growth,X173
  8. Bioremediation of Crude Oil Contaminated Soil with Immobilized Microorganism,X53
  9. Numerical Simulation for the Heat Transfer of Solar Absorber Employing the Generalized Sources,TK513
  10. Research on Bioremediation of Fe2+ and Mn2+ and the Preparation of Compound Microorganisms,TU991.2
  11. Study on Carrying Capacity of Cultured Shrimp in Shrimp Pond of Integrated Bioremediation,S968.22
  12. Study on Pollution Control and Reproduction of Harmful Organism (Musculista Senhousia) of Arkshell Aquaculture,S944
  13. Application Research of Heterogeneous ERP Database Integration in Network Auditing,TP311.52
  14. The Preparation of Controlled-released Fertilizer and Their Application on Spilled-Oil Bioremediation of Intertidal Zone,X55
  15. The Pilot Study on the Feasibility of Bioremediation on the Different Types of Oil-spilled Shoreline,X55
  16. Influences of Nutrients Addition on the Biodegradation of Diesel Oil in Seawater,X55
  17. Screening Chlorpyrifos Degrading Bacteria from Composing and Research of Bio-surfactant Produced in the Process,X172
  18. Distribution Analysis and Environmental Risk Assessment of VOCs/SVOCs in Petroleum Oil Contaminated Sites,X53
  19. A Study on the Distribution of Organic Pollutants and Its Influence Factors at a Typical Petrochemical Contaminated Site,X502
  20. Screening and Degrading Characterization of Dominant Bacteria for the Degradation of Cypermethrin,TQ450.26
  21. Study on Biology Characteristics and Genetic Diversity of Beauveria Bassiana on Loxostege Sticticalis L. in Inner Mongolia,S476.12

CLC: > Environmental science, safety science > Environmental pollution and its prevention > Soil Contamination and Control
© 2012 www.DissertationTopic.Net  Mobile