device for removing substances from blood and other fluids such as water , wastewater , chemicals and other biofluids , includes i ) an electrocatalytic decomposition filter including a dc power source , a set of electrodes with a catalytic surface or in direct contact with sorbents offering catalytic activity , ii ) an electrosorption filter including a dc power source , a set of electrodes , nanostructured sorption material and / or a porous polymer matrix , iii ) an inlet for entry of blood or blood plasma or dialysate fluid into the device , iv ) an outlet for the removal of purified blood , blood plasma , ultrafiltrate or dialysate fluid from the device , and v ) a conduit connecting the inlet with the outlet and holding the electrosorption filter such that the blood , blood plasma , ultrafiltrate or dialysate fluid is forced through the electrosorption and electrocatalytic decomposition filter , and vi ) a sensor and control system to safeguard the device from producing oxidative stress .