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Atmospheric water extraction. (A) Optical images of the homemade solar-driven AWH system. (B) Water uptake and release at different RH levels. (C) Cycling performance of PZMG at 60% RH. (D) Collected water quality assessed by ICP-MS. An estimated limit of 0.70 mg/L in drinking water was calculated by using a United States Environmental Protection Agency oral reference dose of 20 μg/kg/day (52).
