Detay bilgiSoru #10774
Microplastics in Fluvial Systems
While public awareness regarding microplastic contamination has predominantly centered on oceanic gyres, limnologists have revealed that freshwater fluvial systems are equally besieged by synthetic pollutants. Rivers serve not merely as passive corridors transporting urban plastic waste to coastal estuaries; they are active depositional basins where microplastics accumulate across benthic sediments. Synthetic microfibers shed from laundering synthetic textiles and tiny crumb rubber particles pulverized from automobile tires comprise the dominant share of freshwater plastic loads. Because these microscopic polymers resemble natural food particles in size and buoyancy, benthic macroinvertebrates and juvenile fish indiscriminately ingest them. Beyond inducing physical blockages and lacerations in gastrointestinal tracts, microplastics act as sponges that adsorb hydrophobic persistent organic pollutants, such as polychlorinated biphenyls (PCBs), transferring concentrated toxins up the riparian food web. According to the passage, the primary contributors to freshwater microplastic loads are ----.
- A)textile microfibers released during laundry cycles and crumb rubber particles from vehicle tires
- B)wooden packing crates drifting down alpine streams from timber logging mills
- C)naturally occurring mineral silt grains weathered from granite canyon boulders
- D)organic biodegradable packaging manufactured from compressed corn starch
- E)corroded metal pipes in outdated municipal water distribution grids
Cevabı ve çözümü göster
Doğru cevap: A) textile microfibers released during laundry cycles and crumb rubber particles from vehicle tires
Çözüm: Paragrafta "Synthetic microfibers shed from laundering synthetic textiles and tiny crumb rubber particles pulverized from automobile tires comprise the dominant share..." açıkça yer alır. Doğru cevap A'dır.