Model for designed emission spectroscopic determination of trace metals in pure substances after coprecipitation with cadmium sulphide

Simeonov, Vasil; Karadjova, Irina; Alexandrov, S.

doi:10.1007/bf00488117

Cited by 2 publications

(2 citation statements)

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“…However, the Freundlich adsorption isotherm was capable of describing the data over the entire concentration range studied. The Freundlich isotherm was tested in the following linearized form: log C ads = log A + -log C e where C ads = amount of lead adsorbed (mol-g" 1 5) supports the applicability of the Freundlich adsorption isotherm in the present study. Similar results were reported for the adsorption of lead on poly(methyl methacrylate) (11).…”

Section: Effect Of Concentration Of Adsorbatementioning

confidence: 99%

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Removal of Lead from Aqueous Solutions Using Rice Husk

Khalid¹,

Ahmad²,

Kiani³

et al. 1998

Separation Science and Technology

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Rice husk, an agricultural waste, was studied as a potential scavenger of lead from various aqueous solutions. Physicochemical parameters such as selection of appropriate electrolyte, shaking time, and the concentrations of adsorbent and adsorbate were studied to optimize the conditions to be utilized on a commercial scale for the decontamination of effluents using a batch technique. Maximum adsorption was observed with 0.01 moldm" 3 acid solutions (HNO 3 , HC1, H 2 SO 4 and HC1O 4 ) using 1000 mg of adsorbent for a 4.82 X 10" 5 moldm" 3 lead concentration in less than 10 minutes equilibration time. Studies show that the adsorption decreases with an increase in the concentrations of all the acids. The adsorption data follows the Freundlich isotherm over the 9.65 X 10~5to4.83 X 10~3 moldm" 3 range of lead concentration. The characteristic Freundlich constants, i.e., \ln = 0.93 ± 0.04 and A = 19.86 ± 0.82 mmolg" 1 , have been computed for the sorption system. Thermodynamic parameters, i.e., A C , AS", and A//°, have also been calculated for the system.

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Section: Effect Of Concentration Of Adsorbatementioning

confidence: 99%

“…These include precipitation as sulfide (1), formation of volatile compounds" such as hydride (2,3) and alkylates (4), solvent extraction (5,6), ion exchangers (7), ferritization (8), and adsorption. Adsorption of lead on various inorganic materials and organic compounds has been studied by various workers.…”

Section: Introductionmentioning

confidence: 99%