| Abstract (English): |
Using high-concentration aqueous ink printing waste liquid as raw material, solid-liquid separation is carried out to obtain high ammonia nitrogen wastewater and ink sludge by a coagulation-heat curing method, and the sulfonated ink sludge is prepared by a simple sulfonated modification treatment. Then two kinds of sludge are used as adsorbents to remove ammonia nitrogen from wastewater. The functional group changes and morphological characteristics of the adsorbent are characterized by FT-IR and SEM. Various factors, including initial pH value, adsorbent dosage, particle size, adsorption time, adsorption temperature, frequency of oscillation and other factors, are studied to evaluate the effects of two adsorbents on the removal of ammonia nitrogen in wastewater. The results indicate the adsorption capacity of sulfonated ink sludge, sulfonated coal and ink sludge reached 378.25 mg/g, 272.29 mg/g and 142.78 mg/g, respectively, and the removal rates of ammonia nitrogen on sulfonated ink sludge were 88.99%, which is higher than ink sludge (33.59%) and industrial adsorbent sulfonated coal (64.07%), when the initial ammonia nitrogen concentration in the wastewater is 5 100.06 mg/L, the pH value is 9, the adsorbent dosage is 12 g/L, the 100-mesh sieve is passed, the adsorption temperature is 25 ℃, the adsorption time is 90 min and the oscillation frequency is 150 r / min. And the adsorption of ammonia nitrogen on sulfonated ink sludge follows the Freundlich isotherm adsorption model, and the quasi-second order kinetic model and the particle diffusion model were used for the kinetic model. [ABSTRACT FROM AUTHOR] |
