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Beating the Blues by Floc & Lock.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Beating the Blues by Floc & Lock./
作者:	van Oosterhout, J. F. X.
面頁冊數:	1 online resource (247 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-05, Section: B.
Contained By:	Dissertations Abstracts International84-05B.
標題:	Surface water. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29877796click for full text (PQDT)
ISBN:	9798352983539

Beating the Blues by Floc & Lock.
van Oosterhout, J. F. X.

Beating the Blues by Floc & Lock. - 1 online resource (247 pages)

Source: Dissertations Abstracts International, Volume: 84-05, Section: B.

Thesis (Ph.D.)--Wageningen University and Research, 2022.

Includes bibliographical references

Blooms and scums of cyanobacteria led to prolonged swimming bans in Lake Rauwbraken (The Netherlands). We mitigated this nuisance by imposing phosphorus limitation on the lake. Our lake system analysis revealed that, over 40 years history, small dispersed sources built up a legacy phosphorus pool in the sediment and that the internal sediment release of phosphorus was the main phosphorus-source to the cyanobacteria (Chapter 2). The practically and economically most feasible approach was to reduce the internal phosphorus load by applying a solid phase phosphorus sorbent (SPS). We combined the flocculent poly aluminium chloride (PAC; Floc; Chapter 3) with the SPS lanthanum modified bentonite (Lock; Phoslock®; Chapter 3) as sinking weight to sink a present bloom, additional lanthanum modified bentonite was applied to the reduce internal phosphorus load. The treatment first stripped the water column of phosphorus using a flocculant (Floc) (Chapters 3, 4), shifting the lake from a (hyper) eutrophic state to a mesotrophic state. It also provided an instantaneous cure to the nuisance and lifted the imposed swimming ban (Chapter 4). Longer term, water quality remained good for more than a decade, but due to ongoing and increased external phosphorus loads, the lake is returning to a eutrophic state (Chapter 5). Directly after its application, the treatment caused a temporarily decrease in the Daphnia population in the lake (Chapter 4). Four years after the treatment Microcystis cells emerged from the lake sediment and produced a minor low-toxic scum. The event did not lead to a proliferation into a nuisance bloom (Chapter 5). Other than this mystery scum, the lake remained free of cyanobacterial nuisances. Directly after the application the Dutch maximum permissible filterable lanthanum concentration was exceeded for after 75 days (Chapter 6). Three years after the application, part of the LMB is relocated to the deeper part in the lake (Chapter 6). The lanthanum from the LMB is taken-up by Crayfish (Procambarus fallax f. virginalis) and macrophytes (Chapter 6), no ill effects were observed in the Crayfish nor in the lake itself. Successful mitigation of high densities of toxic cyanobacteria depends on strict definition of the problem, lake system analysis and knowledge of the human factor: socio-limnology (Chapter 7).

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352983539Subjects--Topical Terms:

3685235
Surface water.
Index Terms--Genre/Form:

542853
Electronic books.

Beating the Blues by Floc & Lock.
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035 $a (MiAaPQ)Wageningen597897
035 $a AAI29877796
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a van Oosterhout, J. F. X. $3 3695347
245 1 0 $a Beating the Blues by Floc & Lock.
264 0 $c 2022
300 $a 1 online resource (247 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-05, Section: B.
500 $a Advisor: Lürling, Mfllw; Marinho, M. Manzi.
502 $a Thesis (Ph.D.)--Wageningen University and Research, 2022.
504 $a Includes bibliographical references
520 $a Blooms and scums of cyanobacteria led to prolonged swimming bans in Lake Rauwbraken (The Netherlands). We mitigated this nuisance by imposing phosphorus limitation on the lake. Our lake system analysis revealed that, over 40 years history, small dispersed sources built up a legacy phosphorus pool in the sediment and that the internal sediment release of phosphorus was the main phosphorus-source to the cyanobacteria (Chapter 2). The practically and economically most feasible approach was to reduce the internal phosphorus load by applying a solid phase phosphorus sorbent (SPS). We combined the flocculent poly aluminium chloride (PAC; Floc; Chapter 3) with the SPS lanthanum modified bentonite (Lock; Phoslock®; Chapter 3) as sinking weight to sink a present bloom, additional lanthanum modified bentonite was applied to the reduce internal phosphorus load. The treatment first stripped the water column of phosphorus using a flocculant (Floc) (Chapters 3, 4), shifting the lake from a (hyper) eutrophic state to a mesotrophic state. It also provided an instantaneous cure to the nuisance and lifted the imposed swimming ban (Chapter 4). Longer term, water quality remained good for more than a decade, but due to ongoing and increased external phosphorus loads, the lake is returning to a eutrophic state (Chapter 5). Directly after its application, the treatment caused a temporarily decrease in the Daphnia population in the lake (Chapter 4). Four years after the treatment Microcystis cells emerged from the lake sediment and produced a minor low-toxic scum. The event did not lead to a proliferation into a nuisance bloom (Chapter 5). Other than this mystery scum, the lake remained free of cyanobacterial nuisances. Directly after the application the Dutch maximum permissible filterable lanthanum concentration was exceeded for after 75 days (Chapter 6). Three years after the application, part of the LMB is relocated to the deeper part in the lake (Chapter 6). The lanthanum from the LMB is taken-up by Crayfish (Procambarus fallax f. virginalis) and macrophytes (Chapter 6), no ill effects were observed in the Crayfish nor in the lake itself. Successful mitigation of high densities of toxic cyanobacteria depends on strict definition of the problem, lake system analysis and knowledge of the human factor: socio-limnology (Chapter 7).
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Surface water. $3 3685235
650 4 $a Soil erosion. $3 602940
650 4 $a Nitrogen. $3 1314426
650 4 $a Aquatic plants. $3 596994
650 4 $a Eutrophication. $3 896350
650 4 $a Ecology. $3 516476
650 4 $a Vegetation. $3 3560047
650 4 $a Phosphorus. $3 671778
650 4 $a Soil sciences. $3 2122699
650 4 $a Lakes. $3 546147
650 4 $a Groundwater. $3 566494
650 4 $a Nutrients. $3 3562665
650 4 $a Chlorophyll. $3 1004345
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biogeochemistry. $3 545717
650 4 $a Hydrologic sciences. $3 3168407
650 4 $a Microbiology. $3 536250
650 4 $a Limnology. $3 545788
650 4 $a Water resources management. $3 794747
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0329
690 $a 0481
690 $a 0792
690 $a 0425
690 $a 0388
690 $a 0410
690 $a 0793
690 $a 0595
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Wageningen University and Research. $3 3557914
773 0 $t Dissertations Abstracts International $g 84-05B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29877796 $z click for full text (PQDT)