The printery sewage and polluted river
water both meet the discharge standard after being treated once with longan shell, and even satisfy the standards
for irrigation/fishery and drinking water, respectively, after being treated twice. A large amount of functional
groups like hydroxyl, ether, and carbonyl in the longan shell, as well as its intrinsic hydrophilicity, are
responsible for the strong adsorbability toward the heavy metal ions. Not only does the longan shell have low
cost and have inherent environmental friendliness in contrast to all synthetic and even seminatural sorbents
but it also has stronger adsorbability toward Pb(II) and particularly Hg(II) ions than the most natural sorbents
reported, making longan shell attractive as a highly cost-efficient sorbent for the selective removal of hazardous
heavy metal ions.
The printery sewage and polluted riverwater both meet the discharge standard after being treated once with longan shell, and even satisfy the standardsfor irrigation/fishery and drinking water, respectively, after being treated twice. A large amount of functionalgroups like hydroxyl, ether, and carbonyl in the longan shell, as well as its intrinsic hydrophilicity, areresponsible for the strong adsorbability toward the heavy metal ions. Not only does the longan shell have lowcost and have inherent environmental friendliness in contrast to all synthetic and even seminatural sorbentsbut it also has stronger adsorbability toward Pb(II) and particularly Hg(II) ions than the most natural sorbentsreported, making longan shell attractive as a highly cost-efficient sorbent for the selective removal of hazardousheavy metal ions.
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