I know you mention that you ...

I know you mention that you weren’t looking for ion exchange, but I wouldn't rule this out.  For low level concentrations ion exchange and adsorption can be the most economical and environmentally friendly.  There are high capacity, selective medias for the contaminants you mention which can be operated for long periods of time (sometimes 1-2 years) on a single charge, without the need for creating environmentally harmful regenerant wastes.      

There are multiple solutions for your contaminant list, and the best technology selection (adsorption, ion exchange, precipitation/filtration, biological treatment, etc.) really depends on what the water chemistry of that system is and what the treatment goals are.  The most cost effective is often a combination of technologies, especially with multiple contaminants of concern.  If you have a specific case in mind I'd be willing to help you evaluate, feel free to send me a message at sean.kennedy@denora.com