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Yellow leaves are often from overwatering or underwatering. It can also indicate a nutrient deficiency, especially in palms. Are you fertilizing? These articles should help:

https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm

https://www.gardeningknowhow.com/ornamental/trees/palms-trees/how-to-fertilize-palm-trees.htm

It could be! That or a closely related species. They all have similar care, though.

As far as your insect problem... That is scale. Scale is quite difficult to get rid of. You must remove anything that you can by hand, first, since they seal themselves to your plant. This renders chemical treatment ineffective until you break that seal. Once you do that, you can treat with the insecticide of your choice.

https://www.gardeningknowhow.com/houseplants/palms/sticky-palm-tree-leaves-treatment-for-palm-scale.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/what-is-armored-scale.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm

I believe it's getting too much water. During the fall and winter, you can let it dry out a bit between waterings. In spring and summer you can keep it slightly moist, but not saturated. I have found from experience, it's better to err on the side of too little water, than too much. You can cut back the misting to once a week. Also, it needs bright, indirect light, such as from a south or west window, but not direct sun. Direct sun will turn the leaves yellowish green. Yours looks like it is in front of a glass door, but you say it is also under lights. It may be getting some direct sun in front of the door.

I also would remove the brown stalks. Here is more care information:

https://www.gardeningknowhow.com/houseplants/areca-palm/growing-areca-palm-indoors.htm

https://hgic.clemson.edu/factsheet/indoor-palms/

Please be sure to submit the question, only, once.

You don't mention what feeding schedule you have, but it could have much to do with this, and the watering.

Feeding should be done once or twice per year, at the least. An all purpose at half strength is most preferable.

Overwatering could be another factor. These need time to dry out, slightly, between waterings. I would be sure to allow the soil to dry out enough to see on top. With proper drainage, this should allow the bottom to dry enough to stave off infections.

It seems, also, that it is time to transplant into a, very slightly, larger pot. I would only go an inch or 2 larger on all sides.

This article will help with the care of the plant:

https://www.gardeningknowhow.com/houseplants/areca-palm/growing-areca-palm-indoors.htm

Theoretically, yes. They could remove a significant portion of the chlorine gasses present, given that they are well kept and healthy! If they are overwatered, underwatered, or in any form, unhealthy, then they will not perform as well as a purifier will.

This article will provide a range of options that you could use in this situation:

https://www.gardeningknowhow.com/houseplants/hpgen/air-purifying-houseplants.htm

HELLO, MINE ALSO LOOKED ABIT ROUGH, BUT I ADMIT I FORGOT HER IN THE GARDEN SO THE LETHEY WILL REGROW, WISH I COULD GIVE MORE.
.LEAVES WERE BURNT WEI CUT SOME BACK HOPING SHE WILL REGROW. HOPE YOU FIND A SOLUTION
JACK