CONJUGATIVE EFFECT OF LOW COST ADSORBENT WITH LACCASE ENZYME FOR REDUCTION OF PULP AND PAPER EFFLUENT LOAD, ITS KINETICS AND

Pulp and paper industrial effluent has the foremost role in environmental pollution. The key factor of the current study is to determine the conjugative effect of charcoal (60%) and alluvial soil (40%) mixture with laccase enzyme to lessen the effluent load of the pulp and paper industry. The adsorb...

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Bibliographic Details
Published in:Pakistan journal of science 2022-09, Vol.74 (3), p.176
Main Authors: Rabbani, J, Ahmad, SR, Iqbal, M K
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Alluvial soils
Biochemical oxygen demand
Carbon
Carbonates
Charcoal
Chemical oxygen demand
Color
Effluents
Enzymes
Industrial effluents
Industrial wastewater
Kinetics
Laccase
Lignin
Mathematical models
Membrane separation
Mixtures
Nitrogen
Paper industry
Paper industry wastes
Parameters
pH effects
Pulp
Pulp & paper industry
Pulp & paper mills
Soil mixtures
Wastewater
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Summary:Pulp and paper industrial effluent has the foremost role in environmental pollution. The key factor of the current study is to determine the conjugative effect of charcoal (60%) and alluvial soil (40%) mixture with laccase enzyme to lessen the effluent load of the pulp and paper industry. The adsorbent mixture of charcoal (60%) and alluvial soil (40%) was used for the adsorption of biological oxygen demand (BOD) chemical oxygen demand (COD), color, and lignin of effluent. The impact of pH, temperature, adsorbent concentration, and adsorption time on the removal procedure were studied. Adsorption equilibrium was achieved after 50 minutes with an agitation rate of 500 rpm at pH 6.0 at 25°C. Results indicated that COD, BOD, color, and lignin were removed 86%, 80%, 60%, and 62% respectively. Moreover, the laccase enzyme also enhanced the reduction of these parameters as COD 95%, BOD 93% color 83%, and lignin 75%. The experimental batch equilibrium adsorption for COD and BOD was analyzed by Freundlich and Langmuir models and kinetics was also discussed by pseudo-first-order and pseudo-second-order. The BOD and COD data fitted to the pseudo-second-order kinetic model. Thermodynamics parameters ΔG°, ΔH°, and ΔS° results indicated that adsorption was nonspontaneous due to high TDS and lignin, endothermic in nature, and revealed an increase in randomness and degree of disorderliness at adsorbent mixture during the present study. Consequently, the use of laccase enzyme in combination with an adsorbent mixture presents promising results and is applicable.
ISSN:0030-9877
2411-0930