Microbiologists have designed a sustainable way to remove polluting microplastics from the environment by using bacteria.Initial design as it is，it paves the way for sustainably lowering plastic pollution levels and stop the"plastification".
Bacteria naturally tend to group together and stick to surfaces，and this creates a sticky material called"biofilm".Researchers at the Hong Kong Polytechnic University （PolyU） want to use this adhesive bacteria character and capture microplastics in polluted water to form an easily disposable and recyclable blob（團(tuán)）.
Sylvia Lang Liu，microbiology researcher at PolyU and lead researcher on this project，together with his team，has engineered a bacterial biofilm，which can fix and absorb microplastics floating around in the water，and make them sink to the bottom of the water.Then the researchers can separate the microplastics from the bacteria traps and get them ready to recycle.
Microplastics are the plastic fragments，usually smaller than 5mm，which are accidentally released into the environment during production and breakdown of grocery bags or water bottles，or during everyday activities such as washing synthetic （合成的） clothes or using personal care products with scrubbing microbeads in them.Microplastics are visually tiny，making it challenging to develop effective solutions to trap，collect，and recycle them.
Microplastics are not easily biodegradable （生物降解的） ，so they stick around for long and absorb and accumulate poisonous chemicals.They spread into wastewater and into the oceans，endangering marine animals and even usually threatening human health，.Microplastics had be on found in more than 114 species living in the water and also salt，lettuce，apples，and more in 2018 according to the International Maritime Organization.
"This is an innovative application of biofilm engineering to address the plastic pollution crisis，" said Dr Joanna Sadler，researcher at University of Edinburgh，who was not involved in this study."One of the biggest challenges in dealing will microplastics is capturing such small particles Liu and co-workers have demonstrated an elegant solution to this problem，which holds great potential to be further developed into a real-world wastewater treatment technology，"
（1）Which of the following best explains the underlined word"adhesive" in Paragraph 2？ BB
A．Floating.
B．Sticky.
C．Diverse.
D．Visual.
（2）Why are microplastics hard to capture？ AA
A．They are visually too small.
B．They are hard to biodegrade.
C．They continue to exist for long.
D．They are poisonous chemicals.
（3）What can be learned from the last paragraph？ DD
A．Small particles are essential to address water pollution .
B．Biofilm has been widely used to settle plastic pollution.
C．Sadler thinks little of the biofilm engineering application .
D．Biofilm application is promising for wastewater treatment.
（4）What is the text mainly about？ AA
A．Microplastic removal.
B．Uses of bacteria.
C．Wastewater treatment.
D．Plastic pollution.
【考點(diǎn)】環(huán)境保護(hù)；說明文．
【答案】B；A；D；A
【解答】
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發(fā)布：2024/9/13 2:0:8組卷：5引用：6難度：0.6
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