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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The need to explore an environmentally friendly and cheaper ads­orbent for removal of dye from polluted water has imposed a requirement for thorough thermodynamic studies of dye removal from synthetically polluted water. The sorption capacities of untreated corncob charcoal (UCC), treated corncob charcoal (TCC) and commercially available activated carbon (ACC) for malachite green (MG) were determined at pH 3.10 and 5.10, in the tempe­rature range 5–30 °C using the batch adsorption method. The adsorption cap­acity of each adsorbent for MG decreased with the increasing temperature in a manner suggestive of exothermic process. The equilibrium adsorption data were well fitted with Freundlich isotherm. The enthalpy of adsorption is higher at pH 5.10 for any particular adsorbent type compared to data collected at pH 3.10. The adsorption of MG is greatest in activated charcoal at pH 5.10. At pH 3.10 the adsorption process results in reduction in entropy changes in each adsorbent such that ∆S o TCC > ∆S o UCC > ∆S o ACC following the same trend as the change in enthalpy. At pH 5.10, however, ∆S o TCC > ∆S o ACC > ∆S o UCC and the change of enthalpy of adsorption of MG to the adsorbent follows the same order, ∆H o TCC > ∆H o ACC > ∆H o UCC . The values of the enthalpy changes suggest essen­tially physisorption in all cases.

Thermodynamics of adsorption of malachite green hydrochloride on treated and untreated corncob charcoal