3.2. Batch adsorption results
In batch process, 250 mg of water bamboo husk particles were
employed to adsorb heavy metal ions from a 50-mL mixture (23 kinds
of metal ions) with a concentration of 5 mg/L for each single ion
(prepared by diluting the standard solution) at pH 5 and roomtemperature.
In this case apparent equilibrium was established within 3 h of
contact time. The adsorption of water bamboo husk particles was
more favorable to seven metal ions in a competitive circumstance and
their adsorption results are shown in Fig. 4. The other 16 metal ions exhibited
negligible adsorption. In Fig. 4, ions having a strong affinity to
water bamboo husk biosorbent included Cu2+, Cr3+, Pb2+, and Fe3+.
The adsorption percentage ranged from 15.5% (Ni2+) to 99.8% (Fe3+).
Ni2+ and Fe3+ were thus selected for the subsequent investigations
on static and dynamic adsorption.
The adsorption isotherms of Ni2+ and Fe3+ are presented in Fig. 5
(solid symbols, red color), along with the extent of adsorption (open
3.2. Batch adsorption results
In batch process, 250 mg of water bamboo husk particles were
employed to adsorb heavy metal ions from a 50-mL mixture (23 kinds
of metal ions) with a concentration of 5 mg/L for each single ion
(prepared by diluting the standard solution) at pH 5 and roomtemperature.
In this case apparent equilibrium was established within 3 h of
contact time. The adsorption of water bamboo husk particles was
more favorable to seven metal ions in a competitive circumstance and
their adsorption results are shown in Fig. 4. The other 16 metal ions exhibited
negligible adsorption. In Fig. 4, ions having a strong affinity to
water bamboo husk biosorbent included Cu2+, Cr3+, Pb2+, and Fe3+.
The adsorption percentage ranged from 15.5% (Ni2+) to 99.8% (Fe3+).
Ni2+ and Fe3+ were thus selected for the subsequent investigations
on static and dynamic adsorption.
The adsorption isotherms of Ni2+ and Fe3+ are presented in Fig. 5
(solid symbols, red color), along with the extent of adsorption (open
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