WRF Webcast: Managing Intracellular Cyanotoxin Release During Oxidation Processes in Drinking Water Treatment Plants

Thu, Mar 21, 2019 3:00 PM EDT (9:00 PM EET), 1 hour 30 min

Utilities have been seeking guidance to effectively control cyanobacteria cells and eliminate cyanotoxins using holistic management and treatment strategies. Current guidance suggests that switching water sources or removing intact cells can minimize the risk of releasing intracellular (or cell-bound) cyanotoxins. Our presenters will discuss options to use when this operational flexibility is unavailable, including the deliberate release and treatment of intracellular cyanotoxins using oxidation processes. In addition, the incorporation of intracellular cyanotoxin release into the upcoming CyanoTOX Tool (Version 3) will be presented. The webcast will include information from the WRF Tailored Collaboration project, Release of Intracellular Cyanotoxins During Oxidation of Naturally Occurring and Lab Cultured Cyanobacteria (#4692), which highlights ways to improve available guidance to utilities regarding the release of intracellular cyanotoxins during oxidation of naturally occurring and lab-cultured cyanobacteria.

Presenters:
Eric Wert, PhD, PE, Project Manager, Water Quality Research and Development, Southern Nevada Water Authority
Craig Adams, PhD, PE, Oliver Parks Professor of Engineering, Department of Civil Engineering, Saint Louis University
Katie Greenstein, PhD, PE, Chemist, Des Moines Water Works
Eric Rosenfeldt, PhD, PE, Senior Principal Engineer, Hazen and Sawyer
Arash Zamyadi, PhD, Assistant Professor, Polytechnique Montreal, University of Montreal, Canada

Moderator:
Djanette Khiari, PhD, Research Manager, The Water Research Foundation

Register here.

WRF logo

The Oxford Word of the Year 2018 is… “toxic”.

The Oxford Word of the Year 2018 is… “toxic”.

From the article published by Oxford Dictionaries:

“Data show that, along with a 45% rise in the number of times it has been looked up on oxforddictionaries.com, over the last year the word toxic has been used in an array of contexts, both in its literal and more metaphorical senses.”

“One of the many environmental issues discussed this year has been the toxic algae disaster in Florida, US. Thanks to a central role in the state’s Senate mid-terms race, toxic algae garnered so much commentary that ‘algae’ featured as the ninth-most frequently seen toxic collocate for 2018.

Link to the article.

 

Occurrence and diversity of cyanotoxins in Greek lakes

From the abstract of a recent paper published by Christophoridis et al. in Scientific Reports:

“Toxic cyanobacteria occur in Greek surface water bodies. However, studies on the occurrence of cyanotoxins (CTs) are often limited to mainly microcystins (MCs), with use of screening methods, such as ELISA, that are not conclusive of the chemical structure of the CT variants and can be subject to false positive results. A multi-lake survey in Greece (14 lakes) was conducted in water and biomass, targeted to a wide range of multi-class CTs including MCs, nodularin-R (NOD), cylindrospermopsin (CYN), anatoxin-a (ANA-a) and saxitoxins (STXs), using multi-class/variant LC-MS/MS analytical workflows, achieving sensitive detection, definitive identification and accurate quantitation. A wide variety of CTs (CYN, ANA-a, STX, neoSTX, dmMC-RR, MC-RR, MC-YR, MC-HtyR, dm3MC-LR, MC-LR, MC-HilR, MC-WR, MC-LA, MC-LY, MC-LW and MC-LF), were detected, with MCs being the most commonly occurring. In biomass, MC-RR was the most abundant toxin, reaching 754 ng mg−1 dw, followed by MC-LR (458 ng mg−1 dw). CYN and ANA-a were detected for the first time in the biomass of Greek lakes at low concentrations and STXs in lakes Trichonis, Vistonis and Petron. The abundance and diversity of CTs were also evaluated in relation to recreational health risks, in a case study with a proven history of MCs (Lake Kastoria).”

The study was funded by the project ARISTEIA: “CYANOWATER” coordinated by A. Hiskia (NCSR Demokritos) and it also acknowledges CYANOCOST.

Reference:

Christophoros Christophoridis, Sevasti-Kiriaki Zervou, Korina Manolidi, Matina Katsiapi, Maria Moustaka-Gouni, Triantafyllos Kaloudis, Theodoros M. Triantis, Anastasia Hiskia* (2018). Occurrence and diversity of cyanotoxins in Greek lakes. Scientific Reports volume 8, Article number: 17877. https://doi.org/10.1038/s41598-018-35428-x

 

 

 

Algal bloom kills 250,000 salmon in Canada

News reproduced from www.griegseafood.no.

“Grieg Seafood has experienced acute mortality at two of its BC locations in the Jervis Inlet following harmful algal blooms (HAB) in the area. Total mortality is estimated to 250,000 fish or approximately 1,000 tons. This represents some 50 percent of the total biomass from the two locations.

Grieg Seafood continuously works to improve biosecurity and all of Grieg Seafood’s sites perform algal monitoring by taking daily samples which are analyzed using advanced image analysis techniques. This allows for the identification of the species, prevalence and depth distribution of any algae present.

The HAB in Jervis consisted of Heterosigma, a species of microscopic algae that cause acute mortality in fish. Due to extraordinarily high concentration and spread throughout the entire water column, use of Aeration treatments or other protective measures could not prevent the incident.

Grieg Seafood has insurances covering such incidents, and estimated costs including individual share of insurance are limited to NOK 25 million. The costs will be charged the Q2 2018 results”.

Read the original post in Grieg Seafood website here.

Read the Wikipedia article on Heterosigma akashiwo here.

 

 

New research links neonatal exposure to BMAA in a rat model with neurodegenerative diseases

A new paper published by Laura Louise Scott and Timothy Grant Downing of the Nelson Mandela University in South Africa, presents results about the selective toxicity of BMAA during neurogenesis in the rodent brain.  The authors have observed neuropathological symptoms typically associated with Alzheimer’s Disease, Parkinson’s Disease  and Amyotrophic Lateral Sclerosis following a single BMAA neonatal exposure. It is suggested that BMAA elicits its effect by altering dopamine and/or serotonin signaling in rats.

Source: Scott, L.L. and Downing, T.G. (2018), A Single Neonatal Exposure to BMAA in a Rat Model Produces Neuropathology Consistent with Neurodegenerative Diseases. Toxins 10(1), 22. http://dx.doi.org/10.3390/toxins10010022

CYANOCOST wishes and…gifts !

CYANOCOST wishes you a Happy New Year 2018, full of joy and happiness !

To celebrate the New Year, CYANOCOST offers 5 print copies (in colour) of the recently published CYANOCOST Special Issue in AIOL, to new subscribers in our mailing list. You can subscribe using the “Contact” page in www.cyanocost.net (please fill in your full name, Institution, Country, complete mail address and one sentence describing your interest in cyanobacteria/cyanotoxins). Members of list also receive CYANOnews by e-mail (bimonthly).

Subscribe until 10 January 2018, to have a chance to receive one of the 5 copies that will be complimentary sent to you by mail.

You can share this post with your cyano-colleagues and networks.

 

Research positions in Italy: “CYAnobacteria platform Optimised for bioproduction – CYAO”

The CNR-Istituto Biofisica and the CNR Istituto per lo Studio degli Ecosistemi in Italy, are seeking for 3 researchers to work on:

  1. Characterisation of the photosynthetic performance of metabolically engineered cyanobacterial strains. Euraxess Link
  2. Limnological analysis and characterization of algal photosynthetic pigment with special reference to their carotenoids composition based on HPLC analysis. Euraxess Link
  3. Characterisation of the photosynthetic performance and biochemical composition of metabolically engineered cyanobacterial strain. Euraxess link

6th International Symposium “Marine and Freshwater Toxins Analysis” 22-25 October, Baiona- Extended Deadlines

Dear colleagues,

We would like to inform you that we have posted information on the Symposium Website regarding extended the deadlines for (Early) Registration and Abstract Submission until September 15th. Please mark these new dates in your calendars !!!!

For updated information please visit our website : http://www.biotoxinsmeeting.org/

You can download the flyer of the Symposium here.

We would like also to inform that those who are not able to make the payment  through paypal, they can do it by Bank Transfer. For information about the Bank Account details, please contact:
biotoxins.meeting@uvigo.es

Also please make sure you make your reservations for accommodation in the Talaso Atlantico as soon as possible to make sure they will have availability.
For information related with the Symposium, please contact us through the above email address.

Looking forward to seeing you in Baiona in October

Organizing Committee