Lumka, indlela opheka ngayo irayisi inokukubeka esichengeni somhlaza

Uphononongo olutsha olwenziwa ngabaphandi abavela kwiYunivesithi yaseQueen kwaye lupapashwe kwijenali yesayensi i-PLOS ONE lutyhile ukuba ukulungiselela nokupheka irayisi usebenzisa umatshini okhethekileyo we-percolator endaweni yokupheka irayisi kuya kunciphisa inani le-arsenic eyingozi, ephakamisa umngcipheko womhlaza wemiphunga kunye nesinyi, ngokunjalo nokwenza umonakalo kwimithambo-luvo.

Ekubeni irayisi inomlinganiselo ophezulu wezinto eziyityhefu, ngenxa yokukhula kwayo kumathafa akhukulayo, izityalo zerayisi zifunxa iarsenic emhlabeni, nto leyo eyenza ube nesondlo esiphindwe kalishumi kunezinye izondlo.

Ngoko ke, ukupheka irayisi usebenzisa iimbiza ezikhethekileyo akuncedi ekususeni i-arsenic kuyo, kuba yonke into ekhutshwe kwi-arsenic ngamanzi ifakwe kwirayisi kwakhona, kodwa ngokubeka irayisi kwisihluzo koomatshini abalungiselelwe ukulungiselela ikofu. Amanzi aya kudlula kuyo, esusa malunga ne-85% ye-arsenic.

Ngokweziphumo zolu phando, abaphandi baseyunivesithi basebenza ngoku ukuphuhlisa umatshini ofana nomatshini wekofu oza kusetyenziswa kwinkqubo yokupheka irayisi. Abaphandi bacebisa imfuno yokunciphisa umthamo werayisi ukuya kabini okanye kathathu ngeveki.