Removal of two Textile Dyes using Aspergillus niger

Abstract

The current study included studying the possibility of fungi in removing two types of dyes used in textile factories (red and yellow). Three concentrations of dyes (500, 100 and 300) ppm were treated with fungi and measured. Removal efficiency was measured after 72 hours, and the fungus was more efficient in removing the red dye. The removal efficiency was (99.77, 96.02 and 92.19) % for the red dye and (94.11, 93.65, and 88.9) % for the yellow dye. Results indicated that the degradation rate of the low concentrations was higher than that of high concentrations of both dyes. The results recorded decreased pH values for both dyes and all concentrations. It decreased from (7.33, 7.27 and 7.27) to (4.83, 4.83 and 4.87) after 72 hours of red dye treatment and from (7.23, 7.23 and 7.27) to (4.83, 4.83 and 4.8) for the yellow dye. The electrical conductivity also decreased for dyes and all concentrations, from (1509, 1466 and 1501.33) microsiemens/cm to (968, 975 and 972.33) microsiemens/cm for the red dye. At the same time, it decreased from (1472.67, 1481 and 1487) microsiemens/cm to (988.33, 997 and 999.33) Microsiemens/cm for yellow dye. Total dissolved solids values also decreased for both dyes, and all concentrations decreased from (1011, 982 and 1005)mg/l to ( 648, 653 and 651) mg/l from the red dye. At the same time, the yellow dye decreased from (986, 992 and 996) mg/l to (662, 667 and 669) mg/l. Keywords: Textile Dyes, Aspergillus niger, pollution