Dynamic adsorption of As(V) by hydroxyapatite/bagasse biomass carbon composite adsorbent

Hydroxyapatite/bagasse biomass carbon composite adsorbent (HAP-BC) was prepared by hydrothermal precipitation one-step carbonization heating chemical modification method with sugarcane bagasse as main raw material. The effects of initial As(V) concentration, solution pH, bed height and influent flow rate on the penetration curve of HAP-BC adsorption As(V) were discussed. The influence on regeneration and recycling of HAP-BC were analyzed in this paper. The results shown that with increasing initial As(V) concentration, pH and influent flow rate, the break through time and exhaustion time were shorten, but the break through time and the exhaustion time would be prolonged with increasing bed height. Moreover The regenerated adsorbent still maintained a high adsorption capacity for As(V). (paper)