New method offers low-cost alternative to purify salty water
Penn State researchers have developed a new technique that can remove salt from water using less energy than previous methods. The "battery electrode deionisation" method improves upon previous techniques by avoiding a regeneration step by alternating the direction of the electrical current. Thus, instead of using 1.2 volts, researchers switched between -0.6 and 0.6 volts to get the same result.