Acta Chemica Malaysia

Acta Chemica Malaysia

ASSESSMENT OF CHITOSAN FROM SELECTED EDIBLE MUSHROOMS FOR ENZYME IMMOBILIZATION

Abstract

ASSESSMENT OF CHITOSAN FROM SELECTED EDIBLE MUSHROOMS FOR ENZYME IMMOBILIZATION

Journal: Acta Chemica Malaysia (ACMY)
Author:Uraku, A.J., Nworie, F.S., Elem, R.C., Uraku, O.H.
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2023.73.82

Assessment of chitosan from some edible mushrooms for enzyme immobilization was carried out using standard methods. The study was aimed to determine functional properties/quality of chitosan from some wild edible Nigerian mushrooms for industrial applications. The results revealed that the Vmax and Km of both free and immobilize cellulases were in the range of 1.25x 10-1 – 9.25 x 10-1 / 3.90 x 10-1- 6.01 x 10-1mg/ml/sec and 4.67 x 10-2- 9.25 x 10-1 / 6.11 x 10-1 -8.70 x 10-1 respectively. Thermostability and optimum pH for the activities of free and immobilize cellulases were 50oC / pH 6 and 40oC / pH 7 respectively; indicating that the immobilized enzyme on different chitosan beads have good thermostability and pH optimum. Storage stability analysis showed a half-life ranging from 3.11 – 6.62 days for free and 8.00 – 232.00 days for immobilize cellulases. The residual activity of immobilized cellulase on standard chitosan and mushroom base chitosan beads achieved after storage for 8, 193, 81, 21, 125 and 232 days were 52.38, 71.79, 65.93, 71.22, 66.45, and 66.81% respectively. The residual activity and half life values were higher in cellulase immobilized on mushroom beads than that of standard chitosan beads. This research suggests that mushroom chitosan has a great potential as a support and carrier for enzyme immobilization.

Pages 69-78
Year 2023
Issue 2
Volume 7

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Acta Chemica Malaysia

SYNTHESIS OF CuS NANOPARTICLES AND STUDY OF ITS PHOTOCATALYTIC ACTIVITY

Abstract

SYNTHESIS OF CuS NANOPARTICLES AND STUDY OF ITS PHOTOCATALYTIC ACTIVITY

Journal: Acta Chemica Malaysia (ACMY)
Author:Usman Mureed, Zohaib Saddique, Kiran Asad
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2023.68.72

Advancement in nanotechnology has been revolutionary in various filed of life including environment and energy related application. For removal of organic and inorganic pollutants from water bodies, photocatalysis is promising phenomenon and it has been highly effective against textile pollutants such as methylene blue- a commonly used one of azo dyes in textile industry. Dye polluted water bodies are highly hazardous for aquatic life and there are numerous health risks for human beings and animals. To provide a possible solution for removal of dyes from textile wastewater, Copper sulfide nanoparticles offer various advantages over other photocatalyst such as suitable band gap, large surface area and unique electronic structure. Hydrothermal route was employed for synthesis owing to it easiness, cost effectiveness and the control it offers in structural modification of product. Synthesized photocatalyst is capable of degrading 100% methylene blue in 250 minutes indicating its capability for industrial scale application in environmental remediation. This research focuses on the synthesis of CuS nanoparticles via hydrothermal method and its photocatalytic activities were observed on different methylene blue dye.

Pages 64-68
Year 2023
Issue 2
Volume 7

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Acta Chemica Malaysia

GREEN SYNTHESIS OF NANOPARTICLES FOR THE REMEDIATION OF CRUDE OIL CONTAMINATED SOIL AND WATER- A REVIEW

Abstract

GREEN SYNTHESIS OF NANOPARTICLES FOR THE REMEDIATION OF CRUDE OIL CONTAMINATED SOIL AND WATER- A REVIEW

Journal: Acta Chemica Malaysia (ACMY)
Author:Amina Nalweyiso, Isa Kabenge, Christine Betty Nagawa, Joshua Wanyama, John Baptist Kirabira, Farad Sagala, Ahmed Zziwa
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2023.62.67

Oil exploration and production areas are prone to crude oil contamination and conventional remediation techniques are usually toxic, time consuming and expensive. Nanoparticles have emerged as an effective, rapid, and efficient alternative with the green synthesized ones more environmentally friendly and cost-effective. This review looks at the common sources and constituents of crude oil contamination, available conventional remediation technologies and the dynamics associated with utilizing nanotechnology in the remediation of crude oil contaminated soils and water as an alternative. Chemically synthesized nanoparticles have successfully been used for remediation of both crude oil contaminated soil and water though associated with subsequent environmental pollution. Iron nanoparticles standout since they are able to remove a number of contaminants. Whereas green synthesis involves the use of either plant extracts or microbes in the reduction of metal salts, plant extracts are more effective and their kinetics equivalent to chemical synthesis. There is need to evaluate the applicability of green synthesized nanoparticles in the field by understanding their fate and potential toxicity in the environment using multimedia fate models for simulation and life cycle assessment.

Pages 62-67
Year 2023
Issue 2
Volume 7

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