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Questions tagged [environmental-chemistry]

For questions regarding chemicals and chemical processes that act on and interact within environmental systems.

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6
votes
2answers
806 views

Why does water condense on grass and iron grills in cold weather?

In my book it is said that in cold weather fog appears. This fog is nothing but water droplets. After a hot day if the night is cold then the moister in air starts to condense. What I do not ...
1
vote
0answers
207 views

What are most common condition for reduction of hematite to magnetite?

I found that hydrogen can reduce $\ce{Fe2O3}$ to $\ce{Fe3O4}$ under anaerobic conditions, but since I dont have $\ce{H2}$ in my lab what should I use to convert hematite into magnetite? and what ...
2
votes
0answers
257 views

Difference between starch surfactant and CTAB, SDS, Tx-100

I am doing a research on the effect of surfactant on ZnO nanoparticles properties. There is a confusion here between starch surfactant and CTAB, Tx-100 and SDS. I need point on what is the difference ...
1
vote
1answer
56 views

Chemical consideration of biodegradeability

We hear the term 'biodegradeability' being thrown around alot in science, but rarely ever is the science itself explained. What are the chemical properties in a substance that make it biodegradeable?...
6
votes
2answers
898 views

What causes methane to have 25 times higher global warming potential than CO2

What causes methane to have 25 times higher global warming potential than $\ce{CO2}$? I think it has to do with $\ce{CH4}$ being a less massive molecule, but I'm not sure.
3
votes
1answer
80 views

Biodegradation time for biodegradable shopping bags?

How long does it take for the plastic/polythene shopping bags marked biodegradable to biodegrade?
11
votes
1answer
675 views

Urban air pollution and the smell of freshly cut lawn grass?

Recently, all the lawns in the apartment complex that I live in have had their lawns cut - giving that pleasant smell of freshly cut lawn. Now, I am aware that the smell arises from a chemical ...
3
votes
0answers
58 views

Atmospheric carbon removal: asphalt from CO2?

In reading a text about $\ce{CO2}$ recycling and sequestration of various kinds, I came to think about storing atmospheric $\ce{CO2}$ as asphalt. Given cheap energy as in the case of Iceland, and ...
6
votes
1answer
139 views

Bromate forming in open water

According to this article, the city of Los Angeles (in the USA) is facing a problem where bromate, a suspected carcinogen, has been forming in their open water supplies. They believe that the ...
33
votes
4answers
6k views

How much CO2 could you remove from the atmosphere with 2 trillion USD?

I know it's possible to capture $\ce{CO2}$ with various chemical reactions. For example NASA's space shuttle had some kind of regenerative $\ce{CO2}$ scrubber. But how expensive is it? Could a huge ...
6
votes
0answers
388 views

Is my understanding of the Frasch Process correct?

So basically, the whole point of this process is to extract elemental sulfur from underground deposits. Is this process essentially correct or am I missing out certain details? Firstly, three ...
2
votes
1answer
642 views

to convert ppm gas (N2O) concentrations in microgram nitrogen per gram dry soil basis?

What calculations are needed to convert $\ce{N2O}$ gas concentrations in ppm to micrograms of nitrogen per gram dry soil basis? I measured the concentration of $\ce{N2O}$ in soil samples. I extracted ...
7
votes
1answer
165 views

Amending soil pH to change the color of hydrangea flowers

I would like to ensure that my hydrangeas are blue. I am told that adding ammonium sulfate or aluminium sulfate will cause the soil to be more acidic. I am also told that adding elemental sulfur will ...
11
votes
2answers
3k views

What makes pentane, hexane, heptane, and octane dangerous, while butane and nonane aren't?

In particular, how do a methylene more (in the case of the pentane) and a methylene less (in the case of the octane) make the difference in harmfulness to the environment in comparison with, ...
4
votes
1answer
94 views

Measurement of Water Clarity

Turbidity is essentially the clarity of water. Turbidity can be measured in many ways such as a turbidimeter, secci disk or a turbidity tube (which incorporates a secci disk at the bottom). If you had ...
5
votes
1answer
43 views

Can weathering change the composition of something so that it appears different?

There's a murder trial ongoing in Ireland at the moment and one of the pieces of evidence is a spade found at the scene along with the skeletal remains. It was contended by the prosecution that this ...
1
vote
1answer
55 views

Eco Friendly Cleaning Solution [closed]

I would like to find a solution that can kill roof algae, fungus, mold, mildew effectively without using environmentally unfriendly products but don't know enough about chemistry to make a solution ...
1
vote
1answer
927 views

TPE fabric vs PVC fabrics?

I am currently in charge of purchacing fabrics from asia. My personal policy is to try and stay as enviromentally freindly as possible. Your answer to the following question would be of great help and ...
2
votes
0answers
364 views

What is the carbon footprint of a diamond? [closed]

I think it would be interesting and illuminating to calculate the carbon footprint (per carat) of diamond. The answer would undoubtedly be different for artificial (industrial grade) diamonds vs. ...
3
votes
1answer
1k views

Using sodium peroxide to scrub carbon dioxide emissions

I am a student from a school and recently I came across the reaction $\ce{2Na2O2 + 2CO2 -> 2Na2CO3 + O2}$ Can't we use this reaction to reduce $\ce{CO2}$ in the atmosphere by placing some $\ce{...
4
votes
1answer
793 views

Efforts made to reduce the amount of CFC

Till now I have heard $\ce{CO2}$ is the main reason of global warming. I have studied the remedies to control $\ce{CO2}$ many times through books, awarness programs, etc. But today I learned about ...
2
votes
1answer
53 views

What would chemistry seniors like to hear about industrial hygiene?

I have a master degree in physical chemistry with close to 10 years experience as a chromatographer in pharma. About two years ago I made a career change into industrial hygiene. Right now I am ...
2
votes
2answers
387 views

Formation of 2,4-Dichlorophenol by free chlorine mediated oxidation of Triclosan

I cannot find much guidance in the literature. This is the reaction between free chlorine in water and triclosan. I understand ether cleavage and electrophilic aromatic substitution (maybe) involved. ...
4
votes
1answer
224 views

What element or compound could be used to make the ocean more basic?

The ocean is becoming acidic. This is not a natural evolutionary change but happens through human negative effect on the environment. What element or compound could be used to create a more base ocean?...
5
votes
1answer
164 views

Disposing of hazardous waste indicated by numbers on chemicals

I'm doing a book for the African market and the syllabus asks for discussions on proper disposal of chemicals and waste products, particularly in the classroom setting The authors said something ...
5
votes
1answer
243 views

Environmental Alkylating Agents

I am looking for the names of some environmental alkylating agents (in context of DNA damages) found for example in the fume produced by industry. Most of the papers which I have found is concentrated ...
3
votes
2answers
3k views

What are possible hazards of fog machines?

From a chemistry point of view I would like to learn about possible hazards of fog machines. Such devices, also called “foggers”, create vapor which appears like fog or smoke. It is used in discos, ...
1
vote
1answer
145 views

Global warming kinetics

A rule of thumb in chemistry is that a reaction doubles in rate for every 10 °C increase in temperature. Considering the impact of a 10 °C increase in global temperature, would the same rule apply to ...
2
votes
2answers
108 views

How to determine source of air pollution

It should be determined by some metal markers (meaning originating from traffic etc.) but I cannot find any source which would describe it. Thanks.
2
votes
1answer
67 views

How is Humic substance destroyed in nature?

Humic substance consists of many, to my knowledge poorly understood, species of organic matter, mostly carbohydrates chained in intersting (and also poorly understood) ways. Humic substance is an ...
1
vote
1answer
208 views

The science behind fertilizers

Do you know some books or articles that elaborate on the chemistry behind fertilizers? I have taken organic chemistry so far, and inorganic chemistry as well. I am also familiar with the Haber-Bosch ...
8
votes
2answers
268 views

How is this mystery chemical reducing carbon emissions?

My chemistry is not good enough to solve this problem, and it's driving me crazy. At my job, a sales agent approached me to be their representative in my area for their product. It's a product that ...
7
votes
2answers
2k views

What chemicals could absorb/adsorb ambient atmospheric methane?

From an article in the New Scientist in 2010, Since pre-industrial times, methane levels in the atmosphere have risen from around 715 parts per billion to nearly 1800 ppb, claims Folberth. "If ...