Environmental Toxicology - Science topic

Do Aerosols, PM2.5 and PM10 particles contains or behave like natural toxic nano-particles. Whether these particles removal or minimization procedure will follow from the environment and in what circumstances these have adverse effect for living beings and non-living historical monuments. Although, its critical issue for environmental nanotechnology research, however, very less output come into existence for improvement of environment.

Hi all

I'm looking for the following publication. I've not been able to come across it online. If anyone has a copy I'd really appreciate it!

Burger, J. 1994. Metals in avian feathers: bioindicators of environmental pollution. Reviews in Environmental Toxicology and Applied Pharmacology 5:203–311.

Thank you!

Marie Claire

for example what is the difference between N-acetylcistein and BHT(BUTYLATE HYDROXY TOLOUEN)? 

I have searched many papers for allowable concentration of Copper and Chromium in industrial wastewater but I didn't find anything useful.

I would be so grateful if you help me with this matter.

As muscle is the main consumption part of the fishes, then what is the need to analyze the toxic elements in other tissues such as liver, gill and kidney?

Is that to check the accumulation pattern in different organs and their behavior? Or if you have any other suggestions, please give your comments.

Kind regards,

Anand.

I guess Cr6+.  However in practical, we using it more in laboratories.  How to avoid it.

Recently we got a review of a manuscript saying that "data did not follow dose-response patterns". I know about linear models of response, as well as log-logit and probitos-like distributions. However, I was wondering should all biological responses fit in those models?

doing project on remediation of contaminated soil with recovery of heavy metals.so planning to contaminate a sample artificially with heavy metals.

Hi everyone,

I have analyses the on-site and major and trace elements some river water samples , and now I want to calculate several water quality parameters like pollution index, water quality index, metal index, ..etc. In the equations I encountered variables like Si and C0 to calculate the Pi and Cf values. I wonder if they are the same or different meanings. Also can I calculate pollution Loading Index (PLI) for water samples, not the sediments.

Thanks in advance

There are a number of bioassay tools and techniques available. They study LC50, LD 50 (for 24, 48, 96, ....hours). We also do EC studies. I think, mother Nature can provide some hidden physical clues showing toxic effects of toxicants. Different organisms show some defensive or biochemical struggling signals in the form of secretions that can be detected through chemosensing. If we detect the early warning signals by reading the physical or catching the chemical clues mitigation or removal of toxicants could be done  in due time. 

Hello, I am trying the evaluate the toxicity of Zn to freshwater microalgae P. subcapitata with a 72h toxicity test. I was wondering if I should add EDTA in the test medium or not. The obtained results will have to be compared with those obtained with natural water containing Zn.

Can the presence of EDTA alter the bioavailability of Zn?

Can this influence the comparison with results obtained in natural water?

I am working on heavy metal contamination of soils at mechanic site and i need international, regional and even national permissible limit of the metals am working on

Patient diagnosed with CFS in 2001 was an international flight attendant with an Australian airline and has many of the symptoms of Aerotoxic Syndrome.

hello every one. I have measured lead, cadmium and chromium in fish muscles and my result showed a reduction of heavy metals concentrations in females .is it possible that heavy metals have been eliminated in fish eggs?

A conference on “Topics of current hygienic importance in nanotoxicology: theoretical premises, results of animal experiments, population health risks assessment and management” will be held in the Ekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers in 2016 (tentatively, September or October). Although it is planned as a  national event, participation of reputed scientists from other countries would be greatly appreciated.  Those  who are successfully active in this field of research are invited to give a lecture or an oral presentation of their results and novel ideas on relevant topics of their own choice. The working language of this Conference is Russian, but a system for mobile simultaneous interpretation will be established.. The said Center will waive lecturers' registration fee and will pay for their accommodation, meals and a cultural program although, unfortunatrly, there are no funds to finance their travel

A preliminary contact with me regarding this matter should be established  preferably no later than January 31, 2016 through E-mail: bkaznelson@etel.ru

I am working on phytoremidation of  Lantana camara to heavy metal by tissue culture technique

Nanotechnology is being promoted as a new generation environmental remediation technology with immense potential to provide cost-effective solutions to many of the most challenging environmental cleanup problems.  Silver,copper, gold, iron oxides, titanium oxides are some of the commonly used nanoparticles (NPs) that can be used in environmental remediation. Further, nanoparticles can be used as selective and sensitive sensors to monitor toxins, heavy metals and persistent organic contaminants (POPs) in soil, water and air environments. But there appears pitfalls in the horizon! Toxicity issues have raised important environmental concerns. Although we need to make a trade-off but scientist are hopeful about benefits of this new "magic bullets", which far exceed their put-down-able drawbacks.

How do you plan to estimate the availability/production of mushrooms in Finnish forests? by using models? what sort of models?

The Daphnia magna toxicity test of silver nanoparticles always chooses moderately hard water from EPA. But from EPA the the culture media of  Daphnia magna is hard water. I have no ideal for choose the test media. Could you give me some suggestion ? 

Can anyone help me with detail information on how macrophyte and phytoplakton can be use simontaneously in assessment of the ecological state of aquatic environment. what statistic can be use to present the result and what parameters i can use for the monitoring method? is it neccessary to analyse the plants for heavy mental too?

Good morning every one

I am doing a PhD in computer sciences and Risk analysis. My major goal is aggregation of data in order to build an indicator that would assess the consequences of a given scenario of industrial accidents on biodiversity.

In the case of a scenario in which a big volume of an acid or basic solution would be lost in the environment (for exemple Ajka accident, Hungary, 2010) and if we could predict the modification of pH in the surrounding environment (that would go back to 7 after two or three days). Would it be possible to assess "how bad it would be for the biodiversity". I have been told that, for a 7 +- 1.5 pH, almost everything dies. Could we say for example "with a 7+- 1 pH there would be a big impact but with a 7+-0.5 pH almost nothing happens"?

Thank you for your help

Tom

Please can you help me to find Standard and guidline of the permissible limits of toxic heavy metals (copper and silver) in sediment, bivalve and sea water ?

Thx in advance

Corexit oil dispersant received many critiques for its toxicity to human exposure.

Does anyone know about permissible limit of the trace elements (Cd Cr Cu Mn and Ni) for milk or other food? I've been seaching for it in WHO and FAO publications but not all of them are listed

How many the limited concentration  of Aflatoxin, Ochratoxin, T-2 toxin and Zearalenone (ppb) for feeding fish ?

We are planning on developing a project on potential use of fly ash generated from thermal power plants. It has both a number of potentials and pitfalls for use in aquaculture. There is risk of a number of environmental risks especially heavy metal contamination. It used in fish pond there will be risk of transfer of contaminants along the food chain. How the project's aim and objectives can be drawn, the technical design and work plan can be made. Above all, how the pre-application treatment of fly ash can be thought for removal and inactivation of heavy metals and other toxic contaminants. 

Effect of heavy metal lick Zinc, copper and iron on pathogenicity of plants fungal pathogens

The is toxic elements on aquatic organisms

I need to calculate LOD in Hg analysis of fish sample. My method is;

Blank: put 10 mL nitric in microwave vessels and run the program and volume up to 50 mL and read (result received in microgram/L)

Sample: take 1 g sample+10 mL nitric acid in microwave vessels, then run the program, 

My equation is for LOD=mean+ 3*standard deviation

But I receive blank reading in microgram/L unit (See attached excel sheet), then how I calculate LOD? Can you give the example or correct my excel sheet

In the dynamic light scattering studies of cutinase of Fusarium solani pisi what is the Z-Average (d.nm) value generally observed or reported?

Redox state and prevailing ambiance influence heavy metal inactivation and detoxification as well as transformation of nutrients (C, N & P) in soil and aquatic environment

copper contaminated soil

I am just looking for some toxicology protocols using Acartia tonsa as their bioindicator. Does anybody have Parcom or APHA 1992, or ASMT protocols too? I would appreciate! Because I need some details of their methodology!

Environmentally-induced epigenetic changes of gene regulation could result from chronic, lifelong exposure, to low doses of environmental toxicants, such as chemicals including, tobacco smoking and endocrine disrupting compounds, or to other environmental factors such as nutritional changes, and lifestyle-related conditions. These environmentally-acquired epigenetic marks may influence the control of gene regulation through DNA methylation, histone modification, or through a large set of non-coding RNAs (ncRNAs). These epigenetic Effects might be passed on to the developing embryo and child as inheritable non-genetic marks, which recapitulate previous lifelong history of exposure to environmental influences that start from the stage of primordial germ cell, passing through the maturing germ cell, and ending by the zygote stage. This involves the paternally transmitted information on the sperm that contribute to modulating embryogenesis functions and later childhood development, in concert with, the maternally transmitted information encountered by the exposure to a large milieu of environmental factors either periconceptionally or during lactation period.

Over the past few decades, birds have been proven as one of the most favorite candidate group of animals to predict environmental health and to trace footprints of environmental pollutants Burger 1993.  why are birds preferred to other types of indicators? I need reasons to support this statement.......

need answer 

is it justifiable to make a comparison of the heavy metal content between anodonta sp. and macrobrachium sp. (both collected from the river) just because of their different feeding patterns? what factors do i need to consider if i make this comparison?

Hello 

I'm doing a research about ecotoxicity of sediments in a estuary ,specifically a mangrove forest in the north coast of peru  and i'd been looking for a good organism to perform this tests but i can't find anything available here other than the Artemia sp. Would it be ok to use this specie ?

We would Iike to determine water quality  by measuring the reaction of bioluminescent organism when they are added to a water sample.  Can anyone provide us with a reproducible procedure?

I need suggestion, because I'm not sure

Mold grow on sabouraud with chloramphenicol.

Is there a consensus on the optimal concentration of glutaraldehyde for the preservation of marine phytoplankton?  I typically use 1%, but notice that other researchers use from 0.1% to 3%.

I am interested in maintaining as many taxonomic features as possible for LM and SEM with the lowest concentration of glutaraldehyde that is acceptable, since I don't like working with this chemical at sea. I typically work in low chlorophyll high nutrient areas of the Southern Ocean, but may find sea-ice blooms from time to time.

I appreciate you thoughts and recommendations :).

There are many research papers published on Potassium permanganate (KMnO4) bleaching which state that it is sustainable process to do bleaching with potassium permanganate.

e.g.

1. http://trj.sagepub.com/content/78/6/497.abstract

2.http://nopr.niscair.res.in/bitstream/123456789/32548/1/IJFTR%2016(4)%20270-274.pdf 

I agree with conducted research regarding effectiveness and results obtained through use of potassium permanganate, but I have come to know recent news that KMnO4 is restricted in many countries and it is non-biodegradable at all.

CHT Bezema has introduced alternative of KMnO4 which is 99% biodegradable, you may visit following link to know about their product.

As per CHT report, Why KMnO4 is restricted?

Manganese is a heavy metal and not biodegradable. Potassium permanganate (KMnO4) belongs to the substances which are particularly dangerous to the environment with high fish toxicity. In many countries there are strict regulations or even an obligation to provide evidence to avoid any misuse of KMnO4.

Please share your valuable information and thoughts.

Hi all, 

I'm currently studying economic impacts of hazardous waste spills on drinking water, and Carlisle, PA had a highway spill in 1994 which resulted in direct damage of over $4 million. The Pipeline and Hazardous Materials Safety Administration defines the spill as an "HMIS Serious Incident" but finding a detailed report on the spill is extremely difficult; even news coverage seems to be lacking. Any information on this spill would be hugely helpful!

Best, 

Dalton

As the question states, I was curious if there is any research into toxicity or developmental effects of applying Mosquiron to aquatic habitats on non-target species, in particular amphibians or fish.

I have done BSLT, but I don't know how artemia larvae die.

thank you very much for the answers

I will be collecting water samples for an eDNA study on Hellbenders and would like to test the water in the streams to figure out if endocrine disruptors are leading to their decline. Is there a solid test that exists to test water samples for estrogen? That can be done by a graduate student? Thanks!

I want to estimate the non-carcin risk for a group of heavy metals using US EPA method of HQ. One of the metals is Fe (Iron), my problem is that I couldn't get the RFD value for it? Any suggestions? Thanks

nitrogen: phosphorus: potassium fertilizers as a inorganic compound. I indeed have been measured the nutrients concentration in freshwater. But now is there methods to measure them as compound?

Any researcher in toxicity field

I want to determine the metal concentration in sediment using Geo-accumulation index and the geochemical background value is needed for such an exercise.

Please describe the methods and techniques to prepare the slide, staining requirements and study the cells of plant leaf affected by pollutants. 

institute with Atomic absorption spectrometer facility for analysis of heavy metal like Cu, Cd, Zn, Mn, Ni, Fe,Co, Pb and Hg in plant samples with minimal charges or free for research students preferably in and around chennai.

i want find out  the relationship between the ones that was found in oily polluted areas with the one of thee protozoan that i have in our lab that i used for bio-remediation studies. 

I’m doing metal genotoxicity experiments and when I tried to measure caspase activity by capase-Glo 3/7 assay (Promega), the metal lethal concentration 50 (LC50) had a low activity and a nontoxic concentration had an increase in caspase activity. Did I do something wrong or are there a explanation for this result?

Human health risk assessment for water quality of rivers through trace element and heavy metals contact

Hello, I am trying to involve my students in some basic water analysis techniques. Can anyone suggest a simple and fast protocol to measure chlorophyll content in coastal water samples to estimate the concentration of phytoplankton? Many thanks

The leaves and seeds of Abrus precatorius were blended and then macerated in methanol before evaporating the solvent under reduced pressure. Is it that i didnt add DMSO to make a solution? 

How to study toxicological impact of copper on human?

Who can help me of polyurethane combustion consumption produces some toxic products?

Thanks friends

What is the impact of nano Fertilizers on health and environment? 

Hello. I am in the stage of choosing my research study in the field of Environmental Chemistry. I was wondering if you have any suggestions on how to reduce contaminants and ensure the safety of the environment for the benefits of all (esp residents). Since I am living in a community where there are mining industries. The mining companies I'm referring maximize nickel from ore. Any advice or suggestions will be greatly appreciated. Thank you very much!

Chelation......importance

Is that possible to use the iron chelating properties of bacteria as curable remedies from the toxicity of toxic metal in our ivestocks?

Is anyone familiar with any monitoring projects to study trends in emerging contaminants in developing countries?

If formaldehyde has been exposed for 1/2 days for the purpose of fumigating a mushroom farm, how should it properly be disposed? Any negative impact if it is disposed inside farm house wash hand basin???

I am going to analysis organochlorine pesticide residues in fish by using GC-ECD with Quechers method. According to quechers method, sample is extracted by acetonitrile solution. We haven’t programmable temperature control unit in injector side. We use 1 uL as inject volume, split less mode. But some literature said quick expansion of acetonitrile (1 ul) is not good for GC column. Can you help me the overcome this?

please, I need WHO standards and safe limits for pesticide residues and heavy metals content limits in Nigerian leafy vegetables such as Corchorus olitorius, Amaranthus hybridus and spinosus. Anyone with details?

It is a known fact that there is not one "plant availability". Availability of metals and metaloids depends on many parameters of the soils (pH, EC, CEC etc.) as well as on plant physiology (rhizosphere processses). Until today a lot of methods have been developed (column elution methods, single step extraction, sequential extraction), however if one is interested in the availability of non essential trace elements for plant growth (e.g. lanthanides, uranium) what method is the best? Does anybody have experience in that?  

dust roads has significant concentrations of heavy metals, you can be given some use?

Dear friends, Hello, I have enjoyed the conversations very much and first of all I want to thank you for sharing. I am a PhD student in marine biology and decided to work in the subject of Microplastic ingestion by fishes in Southern Caspian Sea. At first part of my work, we are going to examine fish intestines to find any anthropocentric object and in second part, feed juvenile fish with mixtures of food and 0.5 to 5 micron Microplastic (MP) to find their possible cellular movements and effects on cell mechanisms of entrocytes. To find out, I want to use Transmission Electron Microscopy Technique to see weather MP is found in entrocytes of intestine or not and is there any effect on ultrastructure of entrocytes. I have written a proposal and presented it but some experts had doubt about efficiency and practical possibility of this method. I have used the Technique for normal tissues of different fish species but some people think in the EM images, MP will show up as empty spaces and they may be confused with other objects or artifacts. Therefore, I appreciate if you help me in this case. I need to know what you think about it. Happy 2016 and hope you have a nice holiday. Cheers, Zahra

I would like to prepare filamentous fungal biomass (Fusarium solani) to get a mycelium for biodegradation experiment. If anybody suggest me, would be useful.

Thanks in advance

I need published data related to metamizole environmental fate, thank you very much in advance.

Does someone know about field trials with applications of EDTA or DTPA for enhancing the phytoremediation of soil accumulated heavy metals through plant uptake?

Does anyone can be write me about role of plants ( Phragmites Australis, and other emergent plants, in pollution removal in subsurface wetlands? How much percent can be role in reduction of heavy metals, N, P, other macro and micro nutrients? How much percent, minimum, mean and maximum, or range of efficiency.

I need to find some literature articles about the Human toxicology and environmental persistence of Lindane.

Dear colleagues,

in my study I had to run some test on Perca fluviatilis. The exposure time is 21 days Cd exposure + 3 weeks rest + 21 days exposure. 

Actually it is not a chronic test but if we take in consideration the definition of chronic exposure (at least an exposure of 10% of the total life span) it is neither chronic.

How can I define this exposure?

Cheers,

Giorgio Sperandio 

I need a few clarifications about the formaldehyde method (SE F DEC manual, B-5.1 , formaldehyde in fish using NASH's reagent )

1. NASH's reagent use in this method, I saw the leterature, that it should be freshly prepared, but in this method it is not mention. Is it ok?

2. Time period between sample prepartion and UV-VIS reading. The color develop with the time. Hence, I think thereshould be limited time before the reading (2 min or 10 mi etc). Unless the absorbance varied. Is it ok?

3. there is a factor in calculation, what will be the approximate value of the factor, this is for cross check my value