Questions related to Heavy Metal Pollution
There are different treatment methods for wastewater for organic and inorganic(heavy metals) pollution. Majorly, chemical processes such as precipitation, oxidation, neutralization, electrolytic, ionic exchange, and adsorption are considered in cases of heavy pollution.
Nowadays, many industries and activities discharge various types of heavy metal ions with their effluent including Cu, Fe, Cd, Cr, Pb, Ni, etc.
Is there any industry in which copper and cadmium are the major constituents of its effluents?
In my literature review on electroremediation of soils polluted by heavy metals, I’ve come across many researches that have used a kaolin/kaolinite sample like a soil model. In addiction, I’ve also noted that no justification related to this usage had been given.
In this respect, I think of this justification should be given due to many people when start to work on this issue are not aware of the similarity relationship between the soil and kaolinite/kaolin in terms of chemical composition and the fact the kaolin is itself a natural soil component. Moreover, as far as I was taught, one have to justify every approach done in a research project.
Finally, It’d be noted that I’ve already achieved to figure it out, but after I’ve looked for it in literature related to chemical composition of soil and scientific models.
Please, let me know what do you think about this concern.
I thank you in advance.
I am currently doing my research on sustainable rehabilitation of selected abandoned mine sites in Namibia. One of the selected site has got a huge slag dump and is a source of heavy metal pollution especially arsenic, zinc, lead and vanadium.
Increasing the demand of lead recycling industries in so call E- vehicles or eco friendly initiatives. It was observed that the SOP and the work culture is rarely bothered about the exposure to the labour in such recycling units at melting section, lead oxide mill, red oxide area and ingots making sections. So I want to know about the study conducted on the accumulation of lead in the lungs of the front line workers and is chances to defuse lead from lungs ( respiratory system/track) to blood ??
I have searched various documents and found usage of different values by various authors, please share proper details for oral response dosage for heavy metals as per USEPA norms (Latest)...
Thanks in advance
PS: Working for Indian scenario of Heavy metal pollution in groundwater...
Please help me with suitable reports/ papers/ articles that provide the permissible limits of Lead, Cadmium, Chromium, Mercury in commonly consumed vegetables such as Radish, Spinach, Cauliflower etc.
How many mechanisms are there between heavy metal pollutants and microorganisms? Who can detail the application of these microorganisms in the engineering field?
I just participated in a farmland restoration project and suddenly found that no-tillage technology is a very effective way to control heavy metal contaminated farmland.
Mechanism of straw returning to soil for prevention and control of heavy metal contaminated soil：First , straw returning has a certain barrier effect on chromium pollution caused by atmospheric deposition;Then, the straw is degraded to release organic matter, which on the one hand increases soil fertility, on the other hand, soil organic matter can be complexed with free chromium to reduce the bioavailability of chromium.
I want to set up a pot experiment of which phytoremediation techniques should be used as to remove metals. So, which plant I should use or who are the most effective accumulators.
In one of my experiment, some adsorbent is used for the removal of heavy metals from water. Now I want to recover the metal from residues.
Several methods are available such as phytoremediation, washing, eletrokinetic treatment, and vitrification etc. So, which technique is more feasible and effective?
The aim of speciation procedures is to maintain the integrity of heavy metals species and minimise sample preparation procedures that may alter heavy metals speciaton. There is a tendency for laboratories to choose methods they are familiar with rather than the most appropriate procedures likely to obtain accurate and unambiguous speciation data.
Especially in metropolitan areas.
Which one has the highest impacting today?
Which heavy metal have the highest pollution rate in urban soils todays?
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.
I am using dielectric cell to detect the heavy metal pollution in the soil, using Fe, Cd, Zn and Pb.
how can i differentiate between these four HM??
Can somebody suggest to me the best way to analyze REE's and heavy metal contents in tree bark samples? Is it necessary for me to take any precaution steps in analyzing heavy metals in soil samples by using FAAS? Especially to overcome the problem related to the phosphorus or silica factors.
Is it possible just comparing only the element concentration in biota and sediment, excluding the TOC and lipid?
Based on the attached picture, is it possible for the fluorescence probe (carbon dots) to quench all the heavy metal ions with slightly different values or there is some thing wrong with the reading and it is suppose to be selective determination. Please help.
The PLI value greater than one indicates the metal pollution in the sediments. Is anyone experienced the extremely high values (suppose 100 or 1000) in the marine sediments samples?
Please share your experience!
Thanks in advance!
I'm working on cumulative risks assessment of lead, chronium, nickel in groundwater and drinking water.
"Combustion induced transport of heavy metals in the gas phase - A review" is your paper. I need the paper to consult what Water-soluble lead in the atmosphere is, but I cannot load this paper. Could you give me this paper by emails? My emails is firstname.lastname@example.org. Thanks
Different approaches have been used or developed to mitigate/reclaim the heavy metal polluted soils and waters including the landfill/damping sites and industrial effluent. Among these phytoremediation has got popularity due to low cost.
Different researchers suggests different plants for different heavy metals under the concept of phytoremediation. It is true that plant uptake heavy metals and make it part of its body. That plant or part of it is disposed off somewhere. But heavy metals will remain is heavy metals and transfer from one place into another. So where is mitigation?
My name is Munish Bidjai. I am a graduate student chemical engineering with food technology as a major.
I am writing my thesis about what the impact is of environment and initial processing on the presence of the contaminants: heavy metals and pesticides in commodities green coffee?
To answer this question, it is necessary to divide this research into three components.
- Green coffee bean origin
- Species of green coffee bean
- Type of production process
I would like to sincerely ask if you have some literature of these kind of topics for me so I can build my case further and use it as a reference for my dissertation.
I would like to thank you in advance.
please contact me by mail: email@example.com
Most of the cases, various metals having species and their toxicity varied largely; so how we can quantify the effect of these metal species on other metal present in soil system.
I need to analyse plant rinsate for analysis of heavy metals as part of a Mine spill contamination project. Do we have any standard protocol for plant rinsate analysis?
How we can explain that the iron oxides and organic matter content control the concentration of heavy metals in the sediments?
I am doing a pollutant (eg: heavy metals) percentage removal analysis with time for a soil column. I received data for pollutant removal percentage for each element with time. I want to find out the trend of those data. What would be the best trend indicator? Linear? Polynomial or something else?
Hello everyone, I am studying the behaviour of nematodes against heavy metal toxicity. I want to perform comet assay, but finding it difficult to optimize the protocol. Although, in C. elegans comet assay has been reported with exposure to BPA, but, I can't find a protocol where nematodes are exposed to toxic metal-containing pollutant under a natural environment in presence of multiple elements. If anyone can suggest a method for the experiment, I remain grateful!
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
Currently, I am doing a research on heavy metals in fresh and salted fishes. Therefore I want to know the latest maximum permissible limits of these heavy metals (Cr, Cd and Pb). The limits which I have are very old (FAO/WHO 1983/1989). Precisely, I want to know about chromium. Thank you
I am analyzing heavy metals in soil and water in abandoned copper mine area. I need the background values.Hope your answers would help me.
I understand the relationships, but I am looking for a clear diagram that shows this. There are many that show nutrient availability as a function of pH in soils, but I am looking for one specifically for heavy metals. I will of course provide attribution.
I find contradictory citations and have not been able to get my hand on the original article. Does any of the heavy metal folks on this site have a copy of the original article that they can share, or at least check for the correct citation? Thanks.
I am looking for a easy protocol if possible even without spectrometer to measure for different heavy metals in water or urine! I have no really need to know exactly how much metals ions I have. My experience it's just to know have or have not? I saw some papers who define the presence of few heavy metals by the same dithizone compound. I am trying to learn more about it!
Can any body please suggest some literatures describing the bio-available proportion of metal from contaminated/polluted soil to animals (e.g., Bivalve mollusc/polycheate etc.) ....Advance thanks due to your kind cooperation.
My partner and I are working on a paper with Ipomoea aquatica as the focus of phytoremediation. If the plant is not fit for consumption, what can be done to the plant after phytoremediation? Especially if it hyper-accumulated heavy metals?
My partner and I are currently doing a research in phytoremediation. I would like to know what are some beneficial uses of plants that have acquired heavy metals (lead and zinc) in their cells. Can they be converted into bio fuel knowing that they have these heavy metals? what are some other uses for plants subjected to phytoremediation?
Aside from precipitation, what other factors could affect the levels of mercury or other heavy metals in the environment?
I need details information about permissible limit of Pb, Cd, Ni, Cu, Cr, Zn & health & environmental effects of those metals.
Municipal and industrial wastewater often contains a cocktail of a multitude of heavy metals and nutrients. Bacteria present in such wastewater may develop multiple heavy metals resistance to cope with such heavy metal stress as an adaptive strategy. These bacteria with multimetal resistance property have the potential for remediating the wastewater or soil contaminated with multiple heavy metals. I expect some enlightening and enriching inputs from RG friends and researchers.
currently, I am now conducting my research for my final year project. the title is a biogeochemical exploration of a gold deposit in Sokor, Tanah Merah, Kelantan, Malaysia.
1) firstly can someone give me an idea about the species of plant that can be an indicator for a gold deposit which suitable with the climate here?
2) secondly about the method. can some give a clear explanation about the sample preparation and digestion for plant and soil sample?
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
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
During calculation of Igeo, EF and CF I couldn't find background references value in Bangladesh.Now which value can I use instead of it? can I use UCC values & which values are helpful for that?
Advance thanks for honest collaboration.
I've soil extractions by TCLP for contaminated soils by Cd, Cr, Ni, Pb, Sb and Zn from a shooting range. These extractions were applied to untreated and treated soils with different nanoparticles as ammendment to reduce available content.
I've the final values of each extraction but I've seen some differences between papers when they calculate and put the data. Final results are expressed in mg/kg, mg/L or as leachability of x element from the x total concentration (%)?
From what percentage is considered a good reduction and to talk that amendments are adequate?
Other question. There are any recent guideline for contaminated soils with references values for each element? USEPA has any actualization from the original TCLP method?
Regards and thank you in advance
I have found ucc value for Fe (from Rudnick & Gao 2004) is 4.09 wt%. but how can I convert it into mg/kg unit?
advance thanks for response and precious time.
Effect of heavy metal lick Zinc, copper and iron on pathogenicity of plants fungal pathogens
I am currently working on the bioaccumulation of nickel in Sargassum polycystum, but I can't seem to find the level limit of nickel in said species. Anyone who knows the level limit in accordance to WHO and NAOCC?
In my previous works I use a local standard limit for heavy metal contamination in soil. But I search a generalized limit. Because recently I involve in a number of coal based power plant EIA projects, where it is very much important for my future projection. Thanks in advance for your help.
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
Heavy metals are toxic elements, which may enter into the food chain through fertilizers. We are going to review the standards of heavy metals in chemical fertilizers in Bangladesh for which I need the references from our neighboring countries.
In my region, Suaeda vermiculata showed a clear dominance in sewage polluted areas. Among the plant species examined in these polluted areas, S. vermiculata was found to be the least in the accumulation capacity to heavy metals. How can we justify its use in phyto-remediation processes?
I made an RDA analysis in R environment, where I would like to anylise the effects of soil heavy metal pollution on plant species distribution. I made the following script and unfortunately on the plot ther are row numbers. The rows mean the sample sites for both the species and soil data collections.
The used script were:
fml<-paste("Species2 ~", paste(impvar, collapse=" + "))
text(cen*1.1, labels=c("Ext", "Int"), col="blue")
Respected research fraternity I am working on a project “Heavy metal contaminant interaction on lime stabilized expansive soils”. I would like to understand the chemistry of salts like Arsenic Trioxide, Cupric Nitrate, Potassium Dichromate, Lead Nitrate and Mercuric Nitrate when they react with oxides of aluminum oxide, silicon dioxide and calcium oxide. The effect on diffused double layer with these above reactions. The concentration of effluent liquid taken for experimental work is 50ppm and 100ppm.
Aluminium cadmium barium and strontium are being applied by forced aerosol Spray into the atmosphere above us continuously. You only have to look at the sky and the changes in it to see that this is real. Carnicom.com is scientific research on this crime on humanity. Why are there not more scientists researching this when we can see it clearly exists and is getting worse. What are the long term effects on human biology. What are the effects on bees and floral and fauna plus our waterways. If we are that concerned about the environment and our health why are we not working to stop it.
there are so many methods of water quality indices; I want to know that does any method use physicochemical and biological parameters to represent overall water quality in a single term.
I'm planning to conduct a study about utilizing heavy metals from plants that had used for phytoremediation, but I'm confuse cause I can't find any literature that explaining about extracting heavy metals from plants.
So I would ask which method should I used for extracting heavy metals from plants? And how about possibility outcome? Is it a liquid or solid?
I hope you help me find a Standard of the permissible limits of toxic heavy metals and thallium in soil stream water and sediment.
This project is located in China.
I'm interested to research on mitigation of heavy metal of water but getting confused for make a suitable protocol for measurement of water hardness & turbidity.
If I want to calculate the enrichment factor (EF), geo-accumulation index (Igeo) .... in sediment core , Should I use the average concentration for all sediment core or I need to calculate it for each layer of the sediment core ??
Hi! My co-researchers and I are studying the application of biochar on the adsorption of heavy metals in soil. We are planning to plant the biochar at a certain depth under the soil and recover it after a certain time. The problem is how are we going to recover the biochar. I hope someone can help. Thank you!
My research is about the bioremediation activities of acanthocephalans in Philippine freshwater lakes. Many studies have shown the high potential of acanthocephalans as biosinks of heavy metal contamination (lead, mercury etc.) in freshwater lakes. In fact, one study shows that bioaccumulation capacity of the acanthocephalan can be up to 147 times higher than that of the fish tissue (Paller et al., 2016). Here is a copy of the journal article this is based on.