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gPROMS-driven modeling and simulation of fixed bed adsorption of heavy metals on a biosorbent: benchmarking and case study

  • Circular Economy for Global Water Security
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Abstract

Adsorptive separation of heavy metals from wastewater is a viable approach to reuse it and avoid environmental pollution. The productive employment of adsorptive separation at a commercial scale, however, relies on the optimized conditions of an adsorber bed holding maximum and selective isolation of the heavy metals. The experimental route includes a significant trial and error approach, is time-consuming, involves operating cost, and remains economically unattractive. Contrarily, simulation of a mathematical model mimicking the adsorption system along with experimental validation can significantly minimize optimization efforts and suggests the best conditions of separation. In this work, a convective-dispersive model and adsorption model for fixed bed adsorption of copper (Cu), chromium (Cr), and cadmium (Cd) metals over wheat bran biosorbent are simulated using the gPROMS tool for benchmarking. The influence of feed flow rate, bed height, and metal concentration is studied, and breakthrough profiles of all heavy metals are predicted and matched with the literature. The error values (R2 and RMSE) and Chi-squared values determined from gPROMS simulations matched well with the previously available MATLAB-simulated data. After a successful benchmarking, we modeled pilot-scale adsorption of Cr on coconut coir (or Biosorbent) in a gPROMS simulation environment. A detailed method and algorithm of gPROMS simulation for Cr isolation is provided. The influence of feed flow rate, bed height, and initial metal concentration is studied on the breakthrough curves of the Cr. The optimum operating condition for the pilot-scale isolation of Cr from the water is suggested. The parameters, such as the axial dispersion coefficient and distribution coefficient, are determined.

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All the necessary data are provided in this manuscript/supporting information.

Abbreviations

C :

Solute concentration in bulk liquid phase

C 0 :

Initial solute concentration in bulk liquid phase

D L :

Axial dispersion coefficient

k f :

External mass transfer coefficient

K d :

Distribution coefficient

K L :

Parameter in Langmuir isotherm

m :

Total dry weight of adsorbent

m total :

Total metal ions passed through column

Q :

Flow rate

q :

Adsorption capacity

q eq :

Adsorption column capacity

q m :

Monolayer capacity of Langmuir isotherm

q total :

Total adsorbed metal ion

R :

Retardation factor

t :

time

t b :

Breakthrough time

t e :

Exhaustion time

TR:

Total removal efficiency

U 0 :

Average approach velocity

V e :

Total volume treated

z :

Bed height

Z m :

Length of mass transfer zone

ε :

Bed voidage

ρ ads :

Density of the particle

v :

Pore velocity

K Th :

Thomas kinetic coefficient

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Funding

This study has the financial assistance from University Grant Commission under the Non-NET scheme, and the financial support through TEQIP-III scheme (Government of India project assisted by World Bank) at Z.H. College of Engg. & Technology, AMU from Ministry of Human Resource Development.

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Authors and Affiliations

Authors

Contributions

Mohd Danish: gRPOMS-driven modeling of heavy metal adsorption, initial draft preparation; Khursheed B. Ansari: conceptualization, draft editing, and revision; Rameez Ahmad Aftab: modeling work and drafting of the manuscript; Mohammad Danish: concept, visualization, and Supervision; Sadaf Zaidi: suggestions on manuscript and visualization; Quang Thang Trinh: modeling inputs, final drafting, and proofreading.

Corresponding author

Correspondence to Mohammad Danish.

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The authors declare that they have no competing interests.

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Responsible editor: Tito Roberto Cadaval Jr

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Danish, M., Ansari, K.B., Aftab, R.A. et al. gPROMS-driven modeling and simulation of fixed bed adsorption of heavy metals on a biosorbent: benchmarking and case study. Environ Sci Pollut Res 30, 71511–71526 (2023). https://doi.org/10.1007/s11356-021-13207-y

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  • DOI: https://doi.org/10.1007/s11356-021-13207-y

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