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New Application For The The World's Strongest Material
Graphene Sieves may be a cheaper way of making seawater drinkable (CCSS Level: Grade 10, Words: 258)
Apr 5, 2017 Science & Technology
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Researchers in the United Kingdom have developed a graphene-based sieve that can filter salt out of seawater, a long-sought-after development that could aid millions of people without ready access to clean drinking water.

The promising graphene oxide sieve could be highly efficient at filtering salts, and will now be tested against existing desalination membranes.

Graphene - an ultra-thin sheet of carbon atoms organised in a hexagonal lattice, was first identified at the University of Manchester in 2004 and has since been hailed as a "wonder material," with scientists racing to develop inexpensive graphene-based barriers for desalination on an industrial scale.

According to project leader Dr. Rahul Nair, they can make graphene oxide sieves simply by pouring the solution onto a substrate or porous material. However to make typical graphene permeable for desalination, you'd need to drill holes absolutely no larger than one nanometer into the membrane. "It is a really challenging job, " Nair said.

Cities have been investing heavily in diversifying their water supplies, including developing new desalination technologies to make seawater drinkable. Boosting global access to water is critical. By 2025, 14% of the global population will suffer from water scarcity, the United Nations predicts. In addition, climate change is expected to wreak havoc on urban water supplies, with decreased rainfall and rising temperatures expected to fuel demand.

Someday, these graphene-based sieves could change lives around the world. But before that happens, the team still has to find a way for graphene oxide membranes to filter out salts on an industrial scale.

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ac-cor-ding

as said by


v.根据

aid

help


n,v.援助

at-oms

the basic units of a chemical element


n.原子

ban

officially not allow


v.禁止

bar-ri-ers

a gate or fence that stops access


n.障碍

car-bon

a chemical element that has two main forms (diamond and graphite) and that also occurs in charcoal


n.碳

cli-mate

the weather conditions in an area over a long period


n.气候

de-crease

become less or smaller


v.减少

de-mand

the amount of something needed at one time


n.需求

de-sal-i-na-tion

removing salt (from water)


n.海水淡化

de-ve-loped

cause something to grow or go into production    


v.研发

di-ver-si-fy-ing

make or become more diverse or varied


v.多样化

ef-fi-cient

working without waste

 


adj.高效

ex-pec-ted

something seen as likely to happen


v.预期

ex-pen-sive

costing a lot of money


adj.昂贵

fu-el

material like oil or coal that is burned for heat


n.汽油

graph-ene

bonded carbon atoms in sheet form, one atom thick


n.石墨烯

ha-voc

lay waste to; devastate


v.毁灭

im-ply

strongly suggest the truth or existence of something


v.意味着/暗示

in-clu-ding

containing, having as part of the whole


prep.包含

in-dus-tri-al

related to industry


adj.产业

king-dom

a country or area rule by a king or queen


n.王国

lar-ger

bigger


adj.较大

lat-tice

a grid of criss-crossing parts


n. 格子/点阵

mem-branes

a pliable sheetlike structure acting as a boundary


n.膜

ox-ide

a binary compound of oxygen with another element or group


n.氧化物

pop-u-la-tion

the people who live in a particular place


n.人口

pre-dicts

say or estimate that something will happen in the future


v.预测

re-search

looking for knowledge


v.调研

re-search-er

person who searches for knowledge


n.研究员

scale

the size of something


n.规模

sci-en-tists

experts in science, people who study science


n.科学家

sieve

a membrane with a meshed or perforated bottom for filtering


n.筛子

tem-per-a-ture

how hot something is


n.温度

tem-pe-ra-tures

the amount of heat in something


n.温度

tri-al

a test of how something works    


n.审讯/考验

ur-ban

city area


adj.城市的