samuswashere t1_jdkt1cc wrote on March 25, 2023 at 2:54 AM

Reply to comment by redratus in Scientists have shown how toxic dyes can be filtered out of wastewater using the method and material developed by the group. The procedure uses sunlight as a catalyst and doesn’t involve any pressure or heat. It can remove 80 percent of dye pollutants in wastewater. by Wagamaga

The question of whether 80% is good is a really good one. I’m not an expert on wastewater but I have worked in stormwater treatment. In general it easier to remove a higher percentage of a pollutant if the original concentration is higher. So the average percent removal often isn’t a good indicator of how effective that method of removal will be with different starting concentrations or of what the final concentration to be.