Abstract
The ability of the tropical white-rot fungi and their enzyme to decolorize synthetic dyes was investigated. Production of lignin-modifying enzymes (LMEs) from the three new isolated fungi, namely Trametes hirsuta D7, Ceriporia sp. BIOM 3, and Cymatoderma dendriticum WM01 were observed for 9 days incubation under static condition. The results showed that the LMEs production enhanced in the present of guaiacol. T. hirsuta D7 produced only laccase (Lac), with the highest activity was 22.6 U/L on the 5th-day of the cultivation. At the same time, Ceriporia sp. BIOM 3 and C. dendriticum WM01 secreted both laccases (Lac) with the activities 0.2 U/L and 1.0 U/L, respectively, and manganese peroxidase (MnP) with the activities 0.1 U/L and 1.0 U/L, respectively. Among the fungi, T. hirsuta D7 efficiently degraded 65% Remazol Brilliant Blue–R (RBBR) dye within 72 h using the only laccase. This study shows that laccase may have a major role in synthetic dyes' decolorization process, followed by MnP and LiP.
Highlights
The production of numerous chemicals, including dyes, increased along with intensive industrialization
The results showed that decolorization activity by T. hirsuta D7 occurs along with the growth process
It can be seen from the value of both growth and decolorization rate, which were identical: 1.54 cm/day—two other fungal isolates, Ceriporia sp
Summary
The production of numerous chemicals, including dyes, increased along with intensive industrialization. Synthetic dyes are mostly used in the coloring process of paper, plastics, leather, cosmetics, and textiles industries. 10–15% of dyestuff is released into waterways as effluents[1],[2]. The presence of dyes in the aquatic ecosystem reduces the penetration of sunlight, declining photosynthetic activity, and decreasing the solubility of gases that causes toxic effects on aquatic organisms. Dye-containing effluents are toxic, mutagenic, carcinogenic, and highly resistant to degradation by native microorganisms[3]. The search for appropriate technologies for removing dyes from industrial wastewater is an important priority[4]
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