Can black triangles from IPR be corrected with bonding?

Black Triangles form when the interproximal contact is too far from the the underlying bone.  During Invisalign treatment, when teeth are being shifted, both the bone and tissue is being remodeled.  It is best to finish treatment and wait for the teeth and tissue to settle. If you still have black triangles at the end of treatment then at that time the area needs to be evaluated.  

It's too early to say.  You may see improvement as the teeth align.  If you are still unhappy with the triangles once the teeth are aligned, discuss the options with your dentist.  If the space is present in many areas, I would recommend adding slightly more IPR and bringing the teeth closer together if possible.  This is a much cleaner way of eliminating the space.

wait till complete space closure + more 3 months gum tissue will grow and fill all that space. later u feel any space discuss with yr dentist.