A web smart switch (such as the DGS-1224T) doesn't have anything remotely like an enterprise level feature set. It has a SMB feature set for edge connectivity. I wouldn't use a web smart switch in an enterprise network, period. As for industrial quality, I would question what exactly that means and where you got that information.
The feature list for this switch clearly states
Static Port Trunk (Link Aggregation): up to 6 groups per device, up to 8 ports per group
There are 10 different IEEE numbers listed in the quick specs for this product on http://support.dlink.com and IEEE 802.3ad is not one of them. So, no, this switch does not support IEEE 802.3ad.
For help in selecting product in the future you can speak with our pre-sales team at 1 800 326 1688 ext. 5434, they can advise you as to the feature set of any given product as well as the requirements of your environment.