Wastewater treatment from the tanning process in tanneries in the city of León, absorption process with biomass

Abstract

In the present research work, the adsorption of Chromium (VI) was verified using the shell of the fruit of the plant (Cocos nucífera L.) as organic biomass. The variation of the Cr (VI) concentration in the study was carried out by the spectrophotometric method at a wavelength of 351 nm. The parameters used for the study carried out on wastewater samples were: contact time of 30 min, particle size 0.063mm and adsorbent dose of 5g in 40mL of wastewater, resulting in a removal of 87% of Cr (VI ). The process can be studied through the Langmuir and Freundlich models, since the correlation coefficients obtained for both models were 0.9933 and 0.9997 respectively. The method presented good linear correlation with an R2 value of 0.9989. According to the previous results, it is established that the UV-vis spectrophotometric analysis method used provides reliable results. Activated carbon from coconut shell was found to have good adsorption properties for Cr (VI) removal and is a low-cost design. Therefore, said study would allow the leather industry to implement measures that minimize the environmental impact generated.