Journal of Chemistry / 2017 / Article / Tab 5

Research Article

Lignitic Humic Acids as Environmentally-Friendly Adsorbent for Heavy Metals

Table 5

Average contents of mobile phase, ion-exchangeable phase, strongly bound phase, and residual phase of single Cu2+ ions and Cd2+, Cu2+, Pb2+, and Zn2+ ions adsorbed from their mixture.

Cu2+ (single)Cd2+Cu2+Pb2+Zn2+

Mobile phase9.8%14.4%11.2%12.4%17.8%
Ion-exchangeable phase17.0%25.7%18.0%19.3%21.8%
Strongly bound phase22.2%29.2%23.6%23.1%26.7%
Residual phase51.0%30.7%47.2%45.2%33.7%

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