Method for the Removal or Suppression of Interfering Metal Ions Using Environmentally Friendly Competitive Binders

A method comprising:

• introducing a first competitive binder to a flowback fluid wherein the first competitive binder coordinates with an interfering metal ion in the flowback fluid thereby forming a competitive binder-metal complex;
• filtering out the competitive binder-metal complex thereby forming a reusable fluid;
• using the reusable produced water as a base fluid to form a treatment fluid having a first viscosity;
• introducing the treatment fluid to a subterranean formation and allowing a cross-linked gelling agent to form;
• and
• introducing a second competitive binder to the treatment fluid thereby delinking the cross-linked gelling agent of the viscosified treatment fluid so as to reduce the first viscosity of the viscosified treatment fluid to a second viscosity.