You might check with a left-of-center doctor who does chelation therapy to see what chelation treatment can offer. Chelation bonds a substance to the metals and then your body can excrete them.
According to my bio-friendly dentist, mercury can be easily chelated using 1 tsp. cilantro, 1000mg NAC and vitamin C (to bowel tolerance) per day for a month. This was the recommendation for a 170 lb. guy.