There are plenty of ...
Published by Pau Rodenas Motos, Ph.D. Researcher at Wetsus, Centre of Exellence for Sustainable Water Technology
There are plenty of methodologies, some of them more traditional based on precipitation, coagulation or chelation and there are more innovative based on electrocoagulation, nanofiltration, bioelectrochemical processes, etc...
You can check my thesis in the following link: