September 2014 archive

Metals in the News

What is the problem?                                                                                                                  The problem is that there is a lot of ocean pollution due to metal deposit into the ocean. The article I read was mainly about the Panama River in Brazil, which contains a lot of copper and lead. Copper and lead in water cause problems because they can be toxic to drink and cause damage to the kidney and liver. Lead can lead to physical and mental development problems for children. Also it can lead to high blood pressure.

What is the solution?                                                                                                                  BANANAS. As astounding as it sounds a Brazilian scientist and also banana lover called Gustavo Castro found that the nitrogen, sulfur and most importantly for this ‘product’, organic compounds (carboxylic acid) found in the banana skin can bind with the metals that are supposed to be extracted from the ocean water.

How does this work?                                                                                                                   Mr. Castro did some research and found out that the banana peel contains useful chemicals like nitrogen, sulfur and carboxylic acid. These are all capable of bonding with copper and lead which the river is full of and the people need to get rid of. When copper and lead bond with carboxylic acids a reaction takes place that knocks out or replaces the metals. This is because the acid is much stronger than the copper and lead found in the water.

Does it work?                                                                                                                                 Gustavo Castro tried it with some colleges by first drying and mincing the skin and then he put them in jars with water from the river. They built filters by compressing the peel and then let the water through them. This seemed to work even better than some other ways scientists have tried to clean the water. Also you can use this filter up to eleven times befor it stops working.

Would we and the environment benefit from this technique?                                            Yes, I strongly believe that using this would benefit the environment in large amounts as it would be a way to get rid of the waste we put into the water. Also bananas are generally very cheep, not hard to find and are not very rare. Additionally they don’t leave any chemical residue. Plus you can re-use them 11 times.                                                                                                                                        However scientists do not advocate this cause for home use as there is a minuscule amount of metal found in water from the tap especially as there is sometimes even an extra filter build into the tap.                                                                                           Still this method could be useful in places where they do not have clean water. This method could provide them with clean and fresh water, which could solve dehydration problems and spare people from certain sicknesses.

Summary:                                                                                                                                       The main idea of the article is that bananas have important chemical properties that help get rid of the unwanted chemicals from metals in the ocean and water.         Copper and lead can be extracted from water by using the nitrogen, sulfur and carboxylic acids found in the banana peel.

Definitions:                                                                                                                                    Residue– the remainders or deposit from the use                                                             Advocate– to agree/ encourage a cause in spoken or written form                                     Minuscule– very small

Bibliography:                                                                                                                               Dolasia, Meera. “Banana Peels – The New Water Purifier?” DOGOnews. DOGOnews, 27 Nov. 2011. Web. 22 Sept. 2014.                                                                          McFarland, Mark L., Tony L. Provin, and Diane E. Boellstorff. “Drinking Water Problems: Corrosion.” Drinking Water Problems: Corrosion (n.d.): n. pag. Drinking Water Problems: Corrosion. . Web. 25 Sept. 2014.

Metals Reflection

In my next science report I need to be more specific and explain things in more detail. This would result in things being more clear to the teachers and other people who read it. Additionally I should state the problems and solutions this metal causes. Next time I could improve it by writing more scientific explanations for the report.


Stereotypes and Characteristics

A stereotype is a fixed image or idea that many people share for a certain type of person. For example, a few of stereotypes for boys are that they are good at sports, don’t ever cry and are fearless. Stereotypes are often very overexadurated and not true. Some stereotypes have a certain truth to them but this is not always the case. Sometimes stereotypes even influence people so much that they feel like they must be exactly like that. For example (from my experience) boys often try not to show when they cry or are afraid.

On the other hand a stereotype might be useful when you meet new people. Right before you get to actually meet them in person our brain already makes assumptions about what the people will be like just based off stereotypes. This means that when you are meeting new people you have something you could talk about, like sports for boys or male celebrities for girls. These things may not always really be one of their interests but it is at least something to start off a conversation.

The quote ‘You can’t judge a book by its cover’ pretty much summarizes everything I said pretty well as there are somethings you can guess/ sometimes even see by just looking at someone but other things you will never know about a person until you actually ask/ talk to them.