Could a Sponge Made from Squid Bones Help Remove Microplastics?

While microplastics seem to be everywhere, CNN reports that scientists in China "have come up with a possible solution: a biodegradable sponge made of squid bones and cotton" (which contain two organic compounds "known for eliminating pollution from wastewater...")
They then tested the sponge in four different water samples, taken from irrigation water, pond water, lake water and sea water, and found it removed up to 99.9% of microplastics, according to a study published last month in Science Ad