By what means does activated charcoal decolorize dye in wastewater? How does activated charcoal work?

What is the significance of break point chlorination in terms of disinfection ideas to apply?

I currently have a  question about welding, hopefully, I chose the right subject in which welding falls under. Anyway, my question is what is the minimum gas flow rate for a nozzle size?

You are in a smoky room for three hours and the CO concentration is 45 ppm. What %COHb did you experience? What health effects would you expect at this %COHb?

Different pollutants are generated in labs, offices, wards, and other parts of the hospital.

Answer the following question

Is charcoal present in filtration? Yes or No Is chloride ions present in filtration? And, is starch present in filtration? If yes or no please provide evidence

Can you remove adsorbed water by oven drying at 105°C, explain.

Please upload your full solution to the following problem. Determine the dosage and daily consumption of powdered activated carbon (PAC) required for trichloroethylene (TCE) removal given the following design specifications: 6 SUL Influent concentration = 1 mg/L TCE Carbon type: Calgon Filtrasorb 400 (12 x 40 mesh); pb = 450 g/L Freundlich parameters for TCE • Freundlich capacity parameter K = 55.9 (mg/g)(L/mg)¹/n • Freundlich intensity parameter 1/n = 0.48 Treatment objective = 0.005 mg/L TCE Flow rate = 378.5 L/min (100 gal/min) Assume that no other solutes compete with TCE for adsorption onto the PAC, and that the PAC is saturated at the treatment objective.