English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The sorption of Hg(II) ions onto coconut ( Cocos nucifera ) husk has been studied using radiotracer technique. Maximum sorption (96) of Hg(II) ions (7.39×10 -6 M) onto sorbent surface is achieved from 10 -3 M HNO 3  solution in 30min agitation time using 100mg of coconut husk. The sorption data follow the Freundlich and Dubinin–Radushkevich (D–R) isotherms. Sorption capacity (6.84 ± 0.45 mmol g -1 ) and sorption energy (10.6 ± 0.13 kJ mol -1 ) have been evaluated using these isotherms. Among the ions tested to monitor their influence on the sorption, Ba(II), fluoride and tartarate increased the sorption, while thiosulfate, bromide and thiocyanate reduced (&lt; 63 &gt; 26) the sorption. The cations K(I), Ce(III), Cr(III), Fe(III) and Zr(IV) partially suppressed the sorption. The variation of sorption with temperature yields thermodynamic parameters Δ H  = -37.42 kJ mol -1  Δ S  = -1057J mol -1 K -1  and Δ G  = -2.58 ± 0.05 kJ mol -1  at 298 K. The negative values of enthalpy and free energy reflect the spontaneous and exothermic nature of sorption, respectively. The selectivity studies of sorbent show that the coconut husk column can be used to separate Hg(II) ions from Se(IV), Zn(II), I(I) and Tc (VII). The sorbent has a potential in radiochemistry to separate gamma energies of  203 Hg (279 keV) from  75 Se (265 and 280 keV).

Investigation of sorption of Hg(II) ions onto coconut husk from aqueous solution using radiotracer technique