Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam:
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| Format: | Thesis Book |
| Language: | English |
| Published: |
Bonn
Institut für Nutzpflanzenwissenschaften und Ressourcenschutz (INRES), Bodenwissenschaften
2015
|
| Series: | Bonner bodenkundliche Abhandlungen
64 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | 127 Seiten Illustrationen |
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| adam_text | Titel: Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam
Autor: Nguyen, Dang Giang Chau
Jahr: 2015
Table of content
CHAPTER 1 GENERAL INTRODUCTION...........................................................................1
1.1. Rationale..............................................................................................................................2
1.2. The Mekong River delta: an overview...........................................................................3
1.3. Pesticide use and status of pollution in Vietnam and the Mekong Delta...........7
1.4. Antibiotic use and occurrence in different environmental compartments ....12
1.5. Objectives and Hypotheses...........................................................................................17
CHAPTER 2 MATERIALS AND METHODS......................................................................19
2.1. Sampling sites....................................................................................................................20
2.1.1. Sampling sites for pesticide pollution assessment.............................................20
Household survey...............................................................................................................22
2.1.2. Sampling sites for the investigation of antibiotic occurrence.............................22
Household survey...............................................................................................................24
2.1.3. Sampling site for the dissipation study.................................................................25
2.2. Selection of target compounds..................................................................................26
2.2.1. Selection of target pesticides.................................................................................26
2.2.2. Selection of target antibiotics.................................................................................29
2.3. Monitoring procedures..................................................................................................31
2.3.1. Pesticide monitoring................................................................................................31
2.3.2. Antibiotic monitoring................................................................................................31
2.3.3. Experimental design of the dissipation study.......................................................32
2.4. Analytical methods..........................................................................................................34
2.4.1. Pesticide analysis.....................................................................................................34
Chemical and reagents.....................................................................................................34
Analytical method...............................................................................................................34
Quality assurance and quality control..........................................................................35
2.4.2. Antibiotic analysis.....................................................................................................35
Chemicals and reagents..................................................................................................35
Analytical method...............................................................................................................36
2.5. Statistical methods.........................................................................................................37
CHAPTER 3 PESTICIDE POLLUTION IN DRINGKING WATER SOURCES IN THE
MEKONG DELTA: EVIDENCE FROM TWO PROVINCES................................................39
3.1. Introduction......................................................................................................................40
3.2. Materials and methods...................................................................................................42
3.2.1. Study sites................................................................................................................42
3.2.2. Selection of target pesticides.................................................................................42
3.2.3. Pesticide monitoring................................................................................................42
3.2.4. Analytical method.....................................................................................................42
3.2.5. Statistical method.....................................................................................................42
3.3. Results and discussions.................................................................................................43
3.3.1. Pesticide use and handling.....................................................................................43
3.3.2. Pesticide pollution in surface water.......................................................................47
Residue levels compared to guidelines.......................................................................49
Spatial and seasonal differences..................................................................................50
Pesticide residue concentrations at public pumping stations and two main
canals in Can Tho..............................................................................................................52
3.3.3. Pesticide residue concentrations in groundwater, harvested rainwater,
flocculated canal water, and bottled water............................................53
Groundwater........................................................................................................................53
Stored water - harvested rainwater and flocculated canal water........................54
Bottled water........................................................................................................................55
3.4. Conclusions.......................................................................................................................57
CHAPTER 4 OCCURRENCE AND DISSIPATION OF THE ANTIBIOTICS
SULFAMETHOXAZOLE, SULFADIAZINE, TRIMETHOPRIM AND ENROFLOXACINE IN
THE MEKONG DELTA, VIETNAM.....................................................................................59
4.1. Introduction......................................................................................................................60
4.2. Materials and methods...................................................................................................61
4.2.1. Study sites.................................................................................................................61
4.2.2. Selection of target antibiotics.................................................................................62
4.2.3. Antibiotic monitoring................................................................................................62
4.2.4. Experimental design for the dissipation study.....................................................62
4.2.5. Analytical methods...................................................................................................62
4.2.6. Statistical methods...................................................................................................62
4.3. Results and discussion...................................................................................................62
4.3.1. Fish farming practices and antibiotic use at the study sites..............................62
4.3.2. Occurrence of antibiotics in surface water...........................................................65
Antibiotic residues in water at the fish farm sites.....................................................69
Antibiotic residues at the inlet of public pumping stations and in two main
canals in Can Tho..............................................................................................................69
4.3.3. Risk assessment......................................................................................................70
4.3.4. Dissipation of SDZ, TRIM and ENRO in different semi-field experiment systems
......................................................................................................................73
Persistence of SDZ, TRIM and ENRO.........................................................................73
Application of dissipation equations to natural water system...............................77
4.4. Conclusions.......................................................................................................................79
CHAPTER 5 GENERAL SYNTHESIS................................................................................81
5.1. Rationale............................................................................................................................82
5.2. Risk assessments..............................................................................................................84
REFERENCES...................................................................................................................89
APPENDICES..................................................................................................................103
Appendix A1. Water sources and usage share at household level...........................104
Appendix A2. Household interview questionnaire Risk assessment for Drinking
water quality with regard to Pesticide use in the Mekong Delta .....107
Appendix A3. Household interview questionnaire Risk assessment for Drinking
water quality with regard to Antibiotic use in the Mekong Delta .....111
Appendix A4. Basic characteristics of water and sediment of the fate study
experiment. A: water: water system, natural light, B: water: sediment
system, natural light, C: water: sediment system, light control D:
water: water system, light control..........................................................116
Appendix A5. mfZ, Limit of quantification (LOQ), recoveries and Method detection
limit (MDL) of target pesticides..............................................................117
Appendix B. Total pesticide concentrations (pg L ) and the number of pesticide co-
occurred in 181 surface water samples collected from March 2012 to
January 2013 at the 17 sampling locations.........................................118
Appendix C1. Assessment factors to derive a PNECmuaa: (EC 2003a)....................119
Appendix C2. Differences on the conditions of tested systems.................................119
Appendix D. Pearson correlation coefficients between pesticide concentrations and
distance from sampling locations to the Hau River. The pesticide
concentrations were log-transform to get normal distribution. Only
significant correlations are presented..................................................122
ACKNOWLEDGEMENTS...................................................................................123
CURRICULUM VITAE......................................................................................................125
PUBLICATIONS AND PRESENTATIONS.......................................................................127
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| spelling | Nguyen, Dang Giang Chau 1985- Verfasser (DE-588)1081508949 aut Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam Nguyen Dang Giang Chau Bonn Institut für Nutzpflanzenwissenschaften und Ressourcenschutz (INRES), Bodenwissenschaften 2015 127 Seiten Illustrationen txt rdacontent n rdamedia nc rdacarrier Bonner bodenkundliche Abhandlungen 64 Zugl.: Bonn, Univ., Diss., 2015 Zsfassung in dt. Sprache (DE-588)4113937-9 Hochschulschrift gnd-content HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028723222&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Nguyen, Dang Giang Chau 1985- Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam Zsfassung in dt. Sprache |
| subject_GND | (DE-588)4113937-9 |
| title | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam |
| title_auth | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam |
| title_exact_search | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam |
| title_full | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam Nguyen Dang Giang Chau |
| title_fullStr | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam Nguyen Dang Giang Chau |
| title_full_unstemmed | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam Nguyen Dang Giang Chau |
| title_short | Risk assessment for drinking water quality (pesticides and antibiotics) in the Mekong Delta, Vietnam |
| title_sort | risk assessment for drinking water quality pesticides and antibiotics in the mekong delta vietnam |
| topic_facet | Hochschulschrift |
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