Study of carbon nanodots from water hyacinth (Eichornia crassipes) to degrade textiles dyes of skycion yellow HE-4R

The textile industry and textile products are one of the fastest growing industries in Indonesia. On the other hands the development of textile industry has a negative impact on the environment because it contains harmful chemical compounds. One step to degrade the present of dye compound in textile's waste water is using carbon nanodot (C-Dots). In this research, C-Dots was produced from water hyacinth by microwave assisted method. NaOH and NaOCl2 were used to remove lignin and hemicellulose while a direct heating method with a furnace was used for carbonation process. The optimum condition of C-Dots concentration to degrade the azo dye were determined by observing the absorbance parameter and chemical oxygen demand (COD) in the textile's waste water. The highest absorbance reduction of the azo dye, Skycion Yellow HE 4R, 10 ppm at wavelength 700nm came from solution with C-Dots with ratio 4:1 (gram C-Dots to liter of waste water). From this result, it can be concluded that C-Dots produced from Water Hyacinth can be used to degrade azo dyes in textile waste water.