Removal of geosmin and 2-methylisorboneol (2-MIB) in water from Zuikerbosch Treatment Plant (Rand Water) using â-cyclodextrin polyurethanes

Mamba, Bhekie B.; Krause, Rui Werner Maçedo; Malefetse, Tshepo J.; Mhlanga, Sabelo D.; Sithole, SP; Salipira, KL; Nxumalo, Edward N.

doi:10.4314/wsa.v33i2.49066

Cited by 21 publications

(14 citation statements)

References 9 publications

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“…For example, Kelly, Holmes, and Schultz () used hydrophobic material (e.g., polystyrene or paraffin) in a channel catfish ( I. punctatus ) farm which was able to reduce the undesirable flavours in fish. Mamba et al () used β‐cyclodextrin polyurethanes to absorb GSM and MIB in water. However, humic substances also bind to the adsorbent material, reducing its efficiency.…”

Section: Removal Of Off‐flavours In Rasmentioning

confidence: 99%

Controlling of geosmin and 2‐methylisoborneol induced off‐flavours in recirculating aquaculture system farmed fish—A review

Lindholm‐Lehto

Vielma

2018

Aquac Res

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Recirculating aquaculture system (RAS) is an increasingly popular alternative to open aquaculture production systems. However, off-flavours and odours can accumulate in the fish flesh from the circulating water and decrease the fish meat quality. Offflavours are typically caused by geosmin (GSM) and 2-methylisoborneol (MIB) that are lipophilic compounds formed as secondary by-products of bacterial metabolism.Even though GSM and MIB are not toxic, they often are disliked by consumers, and both have very low human sensory detection limits. Multiple methods have been suggested to remove or decrease GSM and MIB in fish, including ozonation, advanced oxidation processes (AOP)s and adsorption removal from water using activated carbon and/or zeolites. So far, purging with fresh water is the only efficient method available to remove the off-flavours. There are multiple analytical methods available for the extraction and separation of GSM and MIB from fish flesh and water. This review discusses the current knowledge of GSM and MIB formation, the challenges faced by RAS farms due to these compounds and process solutions available for their removal. K E Y W O R D S2-methylisoborneol (MIB), geosmin (GSM), off-flavours, purging

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Section: Removal Of Off‐flavours In Rasmentioning

confidence: 99%

Controlling of geosmin and 2‐methylisoborneol induced off‐flavours in recirculating aquaculture system farmed fish—A review

Lindholm‐Lehto

Vielma

2018

Aquac Res

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“…The second modifier, β‐CD, is a non‐toxic stable cyclic oligosaccharide that has a hydrophobic cavity which can form inclusion complexes with a variety of solids, liquids and gaseous compounds. β‐CDs have been polymerized using hexamethylene diisocyanate and toluene diisocyanate to form polymers which have been successfully used in the removal of organic pollutants from water …”

Section: Introductionmentioning

confidence: 99%

Cyclodextrin‐dendrimer functionalized polysulfone membrane for the removal of humic acid in water

Malinga

Arotiba

Krause

et al. 2013

J of Applied Polymer Sci

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Commercial polysulfone (PSf) membranes were crosslinked with a b-cyclodextrin-poly (propyleneimine) (b-CD-PPI) conjugate which had b-CD pendant arms using trimesoyl chloride (TMC) by interfacial polymerization. The morphology and physicochemical properties of the nanofiltration membranes were characterized using Fourier transform infrared/attenuated total reflectance (FT-IR/ATR) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and cross-flow filtration system. Water-contact angle, water-intake capacity, and rejection capacities of the membranes were evaluated. The b-CD-G4 (generation 4)-PPI-PSf and b-CD-G3 (generation 3)-PPI-PSf membranes both exhibited high humic acid rejection of 72% as compared to the commercial PSf which exhibited 57%. The modified membranes were also more hydrophilic (36 to 41 ) than PSf (76 ). These results suggest that b-CD-PPI nanostructures are promising materials for the synthesis of membranes for the removal of humic acid from water.

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“…The use of granular activated carbon for the removal of geosmin and 2-MIB is generally ineffective since these compounds are present at very low concentrations (ng/L) (Saito et al 2008). Water treatment technologies that can remove geosmin and 2-MIB from water below the human detection threshold (\10 ng/L) are thus highly sought by drinking water supplies (Mamba et al 2007). …”

Section: Cyanobacterial Toxinsmentioning

confidence: 99%

CLEAN WATER: water detoxification using innovative photocatalysts

Likodimos

Dionysiou

Falaras

2010

Rev Environ Sci Biotechnol

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Environmental pollution abatement and especially the growing demand for clean water pose one of the most severe challenges worldwide. Besides the scarcity of water resources, the presence of hazardous chemicals with serious adverse health effects, even at extremely low concentrations, impose serious considerations for the quality of drinking water. The rapid evolution of nanoscale science and technology has dramatically expanded the materials' application potential towards radically new or multifunctional properties rendering nanotechnology an indispensable component in shaping modern environmental science. The nanoscale-perspective maintaining the integrity of the environment is currently the stimulus for the development of innovative and cost-effective functional materials and sustainable processes for water treatment and purification. The CLEAN WATER (EU FP7 collaborative project) aims at the development of an innovative and efficient water detoxification technology exploiting solar energy and nano-engineered titania photocatalysts in combination with nanofiltration membranes.In this approach, nanostructured titania with high UVvisible response will be synthesized and stabilized on nanotubular membranes of controlled pore size and retention efficiency as well as on carbon nanotubes exploiting their high surface area to achieve photocatalytically active nanocomposite membranes. Comparative evaluation of the UV-visible and solar light efficiency of the modified titania photocatalysts for water detoxification will be intensively investigated on various target pollutants ranging from classical water contaminants such us phenols, pesticides and azo-dyes to the extremely hazardous cyanobacterial toxins and emerging endocrine disrupting compounds in order to evaluate/optimize the materials performance and validate their competence on water treatment. Particular efforts will be devoted to the analysis and quantification of degradation products as well as their toxicity. All these will be the crucial components for the fabrication of innovative continuous flow photocatalytic-disinfection-membrane reactors for the implementation of sustainable and cost effective water treatment technologies based on nanoengineered materials.

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Removal of geosmin and 2-methylisorboneol (2-MIB) in water from Zuikerbosch Treatment Plant (Rand Water) using â-cyclodextrin polyurethanes

Cited by 21 publications

References 9 publications

Controlling of geosmin and 2‐methylisoborneol induced off‐flavours in recirculating aquaculture system farmed fish—A review

Controlling of geosmin and 2‐methylisoborneol induced off‐flavours in recirculating aquaculture system farmed fish—A review

Cyclodextrin‐dendrimer functionalized polysulfone membrane for the removal of humic acid in water

CLEAN WATER: water detoxification using innovative photocatalysts

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