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An illustration of isotope exchange schematics in: (a) the Singapore Strait water. When high 206Pb/207Pb particulates meet low 206Pb/207Pb water, the 206Pb is preferentially released from particulate to water with other isotopes adsorbing from water to particulates. (b) general estuarine areas. When low 210Pb/Pb particulates meet high 210Pb/Pb water, the 210Pb is preferentially adsorbed from water to particulates with stable Pb releasing from particulates to water.
