Science topics: EngineeringEnvironmental EngineeringEnvironmental Remediation
Environmental Remediation - Science topic
Environmental Remediation is a removal of ENVIRONMENTAL POLLUTANTS or contaminants for the general protection of the environment. This is accomplished by various chemical, biological, and bulk movement methods, in conjunction with ENVIRONMENTAL MONITORING.
Questions related to Environmental Remediation
I have read some articles on this, but reagents to increase the floatability of microplastics are not commonly used. Is it feasible to use biodegradable organic reagents to separate microplastics from soils by flotation? What would be the drawbacks or disadvantages?
The major difference between bimetallic and monometallic nanoparticles which can be applied for remediation purpose. In what context, the bimetallics are more useful than NZVI or monometallics even though NZVI has better removal efficiency. As per previously published literatures, NZVI can remove organic and inorganic contaminants up to ~90% and above. So, why will we use bimetallic instead of NZVI? By using which property of bimetallic, this can be used instead of NZVI? What could be the proper reason for using bimetallic instead of metallic for environmental remediation application? Please explain in details. Thank you.
Evolution runs in perpetuity for billions of years, with innumerable remarkable
innovations inspired and catalyzed by both cooperation and conflict. Bacteria in nature are categorized into beneficial and harmful ones. They have evolved the capacity to communicate chemically to coordinate attacks on others, and a willingness to commit suicide for the greater good of the community. At the very early stage of biological evolution Mother Nature conducted a great experiment: Bacteria and Archaea came together in a fusion event to
synthesize a whole new domain of life, the Eukarya. Over the past 600 million years the Bacteria, Archaea and microbial Eukarya have continued to evolve into brand new niches. In the process thet have created new substances for bacteria to exploit and new environments to inhabit. What conditions detemine the nature of interactions? Do such interactions offer some clues? How such interactions could be exploited to solve the environmental problems humanity is facing today?
In the present plastic age plastics have appeared as highly versatile and immensely beneficial materials to human society. As the most recently used plastic polymers are highly resistant to biodegradation, the huge influx of such persistent and complex materials poses potential risk to the health of environment and organisms including human beings. Their indiscriminate disposal puts a heavy burden on the waste management systems, allowing plastic wastes to infiltrate ecosystems, with the potential to contaminate the food chain and elicit toxic effects on diverse forms of life. Still, there remains paucity of ecotoxicological studies, lack of quality knowledge generation and a huge knowledge gap about the action, potential and toxic effects of microplastics and nanoplastics of environmental origin.
Dear my friends and respected scientists, you please come forward and take part in the discussion on this RG platform and contribute substantially to make it a thought provoking and enriching brainstorming exercise for all of us concerned about this emerging environmental hazard.
TiO2 has been extensively explored as the Photocatalytic material for a number of applications. what are the current mega trends that are in this field? What are the challenges that are still to be achieved and overcome?
Since it is well known that PET waste is an important environmental issue, which is the most common use of PET waste in your country?
In the time of lockdown and due to unstable market situation, a lot of industries have/had stopped their activities, while some of them remain stop till now. Does it have any impact on environmental pollution activities?
There is an upsurge enthusiasm for utilizing biochar produced from waste-biomass in different fields, to address the most important ecological issues. The common thermochemical techniques used for biochar production include pyrolysis, hydrothermal carbonization, gasification, flash carbonization and torrefaction. So, what are the benefits and drawbacks of Biochar preparation in oxygen-restricted condition instead of using inert atmospheric air?
Response surface modelling is used to find optimal or improved settings, Analyze and rectify process problems and weak points, Robust the process or product against the external influences
I'm Director of Research & Development for a company that specializes in new Alternatives, Exotic and/or Green Technologies for use in Environmental Remediation, Alternative Energies, Waste-to-Energy, Compost/Biogas, Oil Spill Recovery, Water Generation (desalination alternatives) and Protective Materials for Nuclear Fallout and Contamination. Clean Nature Solutions (thecnsgroup(dot)eu) is looking for the latest technologies to help promote and utilize in various projects World Wide. Please contact me if you have something unique.
Hi everybody: i am looking for recent datas about the amount of registered biocides containing silver nanoparticles. The most recent data i found is in this paper from Nowack et al. (2011) which explains that about the 53% of biocides registered at EPA contains nanoAg and the 7% of it contains AgNPs. I looked for more recent datas/numbers about biocides cointaining nanoAg/AgNPs, but from main sites like EPA's, REACH's and ECHA's or from the huge amount of papers i read nothing came out. I was wondering if someone has something (papers, reviews, sites etc..) to share with me to help my research. Everything is accepted but it must be referred to biocides containing nanoAg/AgNPs.
Thanks a lot to everyone who will share his/her time with me
I am looking to research on Environmental Planning and Development. The objectives to guide my research will help as well. Thank you for your support in this regard.
Nowadays I'm interested about the application of hydrated electron in environmental remediation. My biggest problem is the generation of hydrated electron. Our lab usually use Xenon lamp or Solar simulator. I read many papers about hydrated electron, and I found that they used high pressure mercury lamp or even LASER. I tried to generate using Xenon lamp(about 3 sun) and our laboratory's mercury lamp(I don't know the exact spec. of them.) but it didn't worked.
My question is, generation of the hydrated electron depends on the light strength of light source. Do you think it is possible to generate it from ordinary Xenon lamp? It is impossible to use laser in my situation so I want to success the experiment using existing equipment.
If it's impossible, how strong should be the lamp to generate hydrated electron?
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.
Recently more concern about multiple contaminated sites have been evolved. As most of the abandoned sites are contaminated with both organic and inorganic contaminants which are highly toxic to ecosystem. Different remediation methods (physical, chemical, and biological) have been applied on either organic or inorganic contaminants remediation but not appropiate for multiple contaminant remediation therefore the question arises is what could be the possible methods for multiple contaminated sites remediation?
By applying a patented technology we can induce aerobic condition in the groundwater of a remediation site. Simultaneously we can influence the redox potential. I am struggling to find a reference in the literature that point toward an optimal potential for the metabolism of these two contaminants to occur in AEROBIC condition.
I want to know whether gaseous odorants occur together with VOCs in the real-world in large enough quantities to be considered important from an environmental remediation perspective or not? In many industrial scenarios, either large volumes of VOCs or odorants are emitted depending on the type of facility. VOCs also pose a threat from an indoor air pollution perspective. Odorants can also be found at wastewater treatment plants and agricultural facilities.
I want to know whether VOCs and odorants occur together in large enough amounts to be considered a threat from an environmental perspective or not? I know they occur together in biogas but VOC to H2S ratio is very low. I also suspect they are emitted together from wastewater facilities (kindly clarify if anyone has some info).
Can someone guide me to specific publications showcasing the emitted concentrations of such mixtures if they occur at all?
I'm a volunteer consultant for two NGOs, both of which have an abundance of this type of verbena. Aside from its use as a medicinal plant, I'm looking for ways to exploit it, as currently it is burned and wasted. Thanks!
I need to prepare a stock solution(50 ml) containing 50 mg/ml of Cr(VI). So, how much amount of K2Cr2O7 must be added in the stock.
doing project on remediation of contaminated soil with recovery of heavy metals.so planning to contaminate a sample artificially with heavy metals.
Hi i am Dr. Zakuan from International Islamic University in Malaysia. I am a senior lecturer in the department of biotechnology. My research focus is on environmental remediation (bioremediation and phytoremediation). In our department, we do have a lot of underutilized research laboratories due to lack of basic research facilities for specific research. Current situations are not allowing us to purchase any equipments anymore. Even research grants are so limited and very small to be used to purchase basic lab facilities. Therefore, i am looking for potential international collaborators who would like to invest of facilities in our laboratory.
applicability of semiconductor-ZVI composite for persistent red-ox reaction.
Which is the best experimental design for investigating washing of oil contaminated soil using surfactant. I know of Taguchi design and Box-behnken designs. But not sure of the best, and don't know about others.
The roles of rhizospheric bacteria in case of terrestrial plants are well studied. They establish 'give together' condition and show any of mutualism, commensalism, amensalism or pathogenic relationship. They are considered as the hotspot of microbial activity often helping in multifaceted ways in nutrient mineralization & aquisition, plant growth promotion, developing 'immunity' against harmful microorganisms. Such activities may be mediated by IAA, siderophores, ACC deaminase, bacterial antibiotics produced by them. By there is huge knowledge gap in case of aquatic macrophytic rhizobacteria. Although the role of many macrophytes have been attempted in phytoremediation of heavy metals and other toxicants as well as in nutrient (nitrogen & phosphorus) removal and wastewater treatment but the real role of the rhizobacteria still remains neglected. Indeed they play the pivotal roles interacting with the macrophytes. The actual mechanisms of action and bacteria-macrophyte interaction need to be unveiled which would be helpful in understanding the phytoremediation and the nutrient reclamation/removal process more clearly.
All the RG colleagues are requested to contribute in discussing the issue with thoughts, experiences and resources. I look forward to an enriching and though-provoking brainstorming on the RG platform.
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.
I am working on remediation of oil sands process-affected water (OSPW)-naphthenic acid (NAs) using wetlands. Part of the objectives for this work is predict the mechanism of NA removal using kinetic studies and to evaluate the feasibility of the method as a long-term remediation option and possibly adoption by policy makers based on the results and toxicity data
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.
Earthworms are regarded as the farmer's friend, earth's outstanding soil processor, recycler, composter and "Cinderella of organic farming". Their gut is the home of hundreds and thousands of bacteria as well as an excellent 'bioreactor'. There remains a black box in the possession of bacteria, their unique properties and activities and unveiling the truth can solve the riddle of soil fertility, vermicast/compost's role, bioremediation and others.
Your views, reviews and related papers are welcome!
I need to know how much is emitted by melting a ton of copper. There are different variables such as the percentage of copper in the ore, the fuel used by the smelter, the environmental regulations, etc. Is there any recent study that will do such an analysis?
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
Hello all, could you tell me any chemicals that has similar reaction properties to Zero Valent Iron (ZVI) Fe0. it is transition element. and very reactive chemical ( catalyst. Thanks
i am think if i shall do comparative studies for environmental remediation and addictive in process engineering.
I’m planning to investigate the degradation pathway of an azo dye which has been degraded and analysed by gcms. I’ve attached a paper relevant to it and would like some advice about simple and precise way to construct a pathway out of the gcms results. Could anyone help for it?
Results after 24hours shows minimal (if any) removal eg. 25ppm (initial) to 23ppm (after 24hrs) for Pb,Cd and Zn performed at 22oC and pH 2. Literature still suggests more adsorption to take place than I have found.
Biochars used were higher temperatures (550/700oC) and showed smaller amounts of functional groups due to higher pyrolysis temperature
Could it be that competition between Metals ions and H3O+ at low pH is causing poor adsorption to active sites?
My next step would be to look at different pH as I am aware this is relatively low for peak adsorption of metals analysed but I am still unsure as to why my results are so low compared to literature.
Thank you for any advice.
Chlorella vulgaris can be used for algal based remediation, specifically in reducing Pb and Cd concentrations.
I've found highly diverse and actively expressed genes related to aromatic carboxylic acids degradation from sponge-associated microbes. However I am not aware of the sources of aromatic carboxylic acids in marine ecosystems (I googled "marine aromatic carboxylic acids" but didn't get any luck). I think aromatic carboxylic acids could be the alternate carbon sources for microbes, but I am not quite sure.
My study specifically involves reintroduction of Brook trout (Salvelinus fontinalis) in a boreal shield lake contaminated by mine effluent. We are planning to perform an in situ enclosure study using larvae/fry, and are trying to find established methods as well as any papers regarding the efficacy of such a test. If anyone can direct me to documents they think may be relevant it would be much appreciated.
I have to conduct a pot study for remediation of heavy metal. How much bacterial suspension (10^8 cells/ml) should be added to pot (2kg soil/pot) having five plant seedlings/pot. How much volume of bacterial suspension is needed to inoculate single pot. The water holding capacity for soil is 60% and I have to maintain 30%. In some research paper it is mentioned 20ml bacterial suspension/pot and in some 50ml/pot and in some 5ml/pot. So it is very confusing to plan the experiment properly.
Combination of Fenton oxidation as chemical pretreatment and surfactants when compare with Fenton oxidation only before bioremediation, expect to enhance mineralization rates of PAHs in soil. However Piskonen and Itavaara (2003) said that this not happened in their study and the efficiency of Fenton oxidation may decrease when surfactants are added simultaneously with Fenton's reagent to contaminated soil.
link of Piskonen and Itavaara paper is write below.
How can we prevent or minimize the clogging of pores in air diffusers so it would not Affect the aeration in case of aerobic biological treatment ?
dust roads has significant concentrations of heavy metals, you can be given some use?
im working on remediation by microwave and investigate geotechnical contaminated soil by petrolrum soils , before remediatin. and after remediation .
my device radiant wave is Household microwave,but i dont know how much wave Penetration on contaminated soils by petrolum ,and i have very much sample contaminated soil for examle 2 kg
I am interested in the process of decision-making for contaminated site remediation and the acceptance of risk-based approaches - especially in Australia, but happy to look at really good case studies elsewhere.
How can we quantify ecosystems health? What are the criteria to be consider for us to say that a certain ecosystem is healthy?
Since researchers are considering the use of cyclodextrins for removal of pollutants such as herbicide, heavy-metals, dyes etc through laboratory experiments. In practical vision, is it possible to remediate the environmental soil/water?
I have read several recent papers concerning ecological restoration and remediation of polluted areas but surprisingly it is often used a BCA in the average project. I understand that meaningful costs and benefits are mandatory to carry out ecological restoration or polluted areas remediation but there are problems linked to the purely economic conception of BCA methodology -such as the difficulty to evaluate social benefits or costs. In fact, I consider that it would be more convenient to use different methodologies –like SWOT analysis plus BCA - to make decisions and plan projects.
So, the points of this post are:
1) Do you believe that only BCA should be applied? What are the advantages of using only this methodology?
2) Do you think SWOT analysis along with BCA should be the methodology considered? What advantages are associated?
3) Is there another available methodological approach? Should there be a mix of methodologies to cope with the planning and maintenance issues of ecological restoration?
Thanks in advance.
I want to find some material for deodorization of soil which polluted by TBM.
I found some material like NaClO or H2O2 or KMnO4 but this material may react with soil and it is hard to estimate the results for example if we have Fe ion in soil H2O2 rapidly decompose and don't reach the deeper region
the most important part for me is to find the reactions that may happen and its kinetic because I wanna to simulate this presses and its necessary to know all reactions constants
a good remediation agent for me is
1. enough selectivity for reaction with TBM (as possible)
2. minimum side or intermediate product like gases
3. well known reaction
Microbial remediation has been used mainly for treatment of two types of pollutants - organic compounds and heavy metals.Molecular tools serve to improve microbial processes in several ways.
Could anyone provide details?. We badly need specifics to this methodology.
I have just measured the Cd concentration of root, higher organs and soil during growth period six times and now I am looking for a numerical model based on time (preferably with CFD).
I have just these concentrations and soil properties data.
Is to recommend a wetland developed around a river, located in an arid climate, to deplete a natural contamination
Many papers on soil gas fluxes use parametric tests, after log transformation, to assess the significance of temporally discrete data sets (see Giammanco et al., 2010). My question is: “why is there a preference for parametric tests when non-parametric tests (e.g. Mann Whitney U for example) may be used on the raw (nontransformed) data?” Is this a matter of preference or is there a strong statistical reasons for favouring parametric tests as opposed to non-parametric tests (which are perhaps better suited to the naturally non-Gaussian distribution of soil gas data)?
I am designing a scope of work for an in situ pilot trial of some remediation products. The social, regulatory, and demographic factors have been considered. My challenge is to design the test plots so that the tidal water flows in somehow (providing oxygen, nutrients, water, and representing true field situations) and drains out while not flooding the test area and washing off remediation agents.
I have considered using perspex sheets buried erect at about 0.5 meters inside with the remaining part sticking up all around the test plots. While this prevents cross-contamination, it significantly reduces the oxygen availability and the stick up could/will hinder tidal flow making the entire system non-representative enough.
Any help as per structural designs/plumbing considerations will be greatly appreciated. N.B. the tidal cycle in the area under consideration is at 6hrs intervals and can be as high as 2.8m during high tides.
Can we use Multiwall Carbon Nanotubes and Biochar both together when applied directly in soil for metal immobilization? And which will be the best method for remediation purposes?
What is the common and easy way to remediate a river that is contaminated with domestic water?
We are looking for about 5 kg material with a dioxin level of at least ng I-TEq/kg in order to process it as a reference material for a validation ring test. We could also take the samples ourselves at a site in Germany.
In agricultural areas, groundwater nitrate levels can be much higher than the drinking water standard, e.g. North China Plain. It seems that a holistic approach is required to solve this problem. What is the best practice to remediate and prevent such pollutants or pollution?