直流電解式水素水生成ボトルによる飲料水中の残留塩素・オゾン濃度の安全基準内抑制と高濃度水素の同時達成
An electrolytic hydrogen-water generating bottle using direct current was evaluated for its ability to produce hydrogen-rich drinking water while keeping potentially harmful byproducts within regulatory limits. Ten minutes of electrolysis with tap water yielded dissolved hydrogen at 444 μg/L, while residual free chlorine declined from 0.18 to 0.12 mg/L and total chlorine from 0.17 to 0.11 mg/L, as measured by colorimetric methods. Extended 30-minute electrolysis produced higher hydrogen concentrations (479 μg/L) with an oxidation-reduction potential of −245 mV; total chlorine species including hypochlorous acid and chloramine remained at 0.09–0.10 mg/L, below the WHO drinking water guideline of 5 mg/L. Dissolved ozone was undetectable or below 0.05 mg/L across three independent detection methods, satisfying official standards in both Japan and the United States (limit: 0.1 mg/L). These findings held even when the apparatus tank was filled to half capacity. Overall, the device achieved abundant hydrogen generation while maintaining residual chlorine and ozone concentrations within established safety ranges.
During direct-current electrolysis, residual free chlorine in tap water is reductively consumed as molecular hydrogen is generated, while dissolved ozone either is not produced or remains below detection thresholds, keeping harmful oxidant byproducts within safe concentration ranges.
Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).
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https://h2-papers.org/en/papers/33818445