The objective of this experimental study was to determine the kinetics and
equilibrium sorption of Cr(VI) in soils collected from Hengshui City of Hebei
Province, China, based on batch experiments. The main concentration for this
paper is on the effect of soil pH, solute concentration and ionic strength as the
variable factors in the sorption of Cr(VI) in soils and the assessment of their
implications to the environment. Atomic Absorption Spectrophotometer
(AAS) was used for Cr(III) analysis; UV-VIS Spectrophotometer for quantification
of Cr(VI) in soil samples and determination of electrical conductivity
and temperature of the soil samples; and Automatic Laser Particle Size Analyzer
LS230 for the determination of soil physical characteristics. Results from
this study show that adsorption and reduction are major reactions accounting
for removal of Cr(VI) from soil solution. It is concluded that chemical reactions
such as reduction, strongly influence Cr(VI) mobility in soil. Adsorption
kinetics experiments indicated that Cr(VI) removal from soil solution increases
with increasing solute concentration, with decreasing pH and with
decreasing ionic strength. Adsorption reactions reached equilibrium within 12
hours in batch reactors. Increasing background electrolyte concentration
(KCI) decreases Cr(VI) adsorption on soil. The Cr(VI) adsorption isotherm
for this soils conforms well to the Langmuir isotherm at constant pH. Two
Cr(VI) adsorption parameters: the maximum sorption capacity (Qo) and
Langmuir adsorption constant (KL), were determined as 1.0135 × 10−4 mol/g
and 0.0622 mg/L, respectively. The reduction of Cr(VI) into less toxic Cr(III),
means reduction of significant environmental problems. Finally, this study
advises relevant environmental governing authorities to observeperiodic monitoring
of the status of Cr(VI) in soils.
How to cite this paper: Kwikima, M.M.
and Lema, M.W. (2017) Sorption Characteristics
of Hexavalent Chromium in the Soil
Based on Batch Experiment and Their
Implications to the Environment. Journal
of Geoscience and Environment Protection,
Received: February 15, 2017
Accepted: March 26, 2017
Published: March 29, 2017
Copyright © 2017 by authors and
Scientific Research Publishing Inc.
This work is licensed under the Creative
Commons Attribution International
License (CC BY 4.0).
SSA, R (2021). Sorption Characteristics Of Hexavalent Chromium In The Soil Based On Batch Experiment And Their Implications To The Environment. Afribary.com: Retrieved May 13, 2021, from https://afribary.com/works/sorption-characteristics-of-hexavalent-chromium-in-the-soil-based-on-batch-experiment-and-their-implications-to-the-environment
Research, SSA. "Sorption Characteristics Of Hexavalent Chromium In The Soil Based On Batch Experiment And Their Implications To The Environment" Afribary.com. Afribary.com, 26 Apr. 2021, https://afribary.com/works/sorption-characteristics-of-hexavalent-chromium-in-the-soil-based-on-batch-experiment-and-their-implications-to-the-environment . Accessed 13 May. 2021.
Research, SSA. "Sorption Characteristics Of Hexavalent Chromium In The Soil Based On Batch Experiment And Their Implications To The Environment". Afribary.com, Afribary.com, 26 Apr. 2021. Web. 13 May. 2021. < https://afribary.com/works/sorption-characteristics-of-hexavalent-chromium-in-the-soil-based-on-batch-experiment-and-their-implications-to-the-environment >.
Research, SSA. "Sorption Characteristics Of Hexavalent Chromium In The Soil Based On Batch Experiment And Their Implications To The Environment" Afribary.com (2021). Accessed May 13, 2021. https://afribary.com/works/sorption-characteristics-of-hexavalent-chromium-in-the-soil-based-on-batch-experiment-and-their-implications-to-the-environment