<abstract abstract-type="toc"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <graphic position="anchor" id="ga" xlink:href="ark:/27927/pgjbg587c3" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" />Number of heavy metals permeation from the (7, 7) CNT and the (7, 7) BNNT in the applied voltages.</p> </abstract>