Someone asked: if impurity clings from one's daily occupation, can chanting alone clear it away?

Yes, to some extent — it depends on the strength of concentration during the chanting. Concentration draws in merit, the pure energy, to clear that impurity away. Two factors matter: first, the quality of that merit-energy; second, the quantity — whether the duration of chanting is long enough each time to draw merit in sufficiently. If the impurity isn't too great, and we chant with a mind that doesn't wander, staying absorbed in each syllable of the chant, or centered within the sound itself, the power of concentration will draw merit in continuously. Seeing, remembering, thinking, and knowing all remain with the sound of the chant alone — then merit flows in continuously, gradually lightening the impurity. But if the mouth chants while the mind wanders to other things, that won't work.