Aimed at probing a new tannery wastewater treatment process,the paper modified flyash by different methods and analyzed various modified flyash adsorption and catalytic performances.Experiment results showed: Catalysis of the acid modified flyash is the best,the effect of adsorption and catalytic properties of flyash can be effectively improved.The best modified conditions through experiment: Sulfuric acid and hydrochloric acid volume ratio was 1:2,adding 15mL acid activators into 10g flyash and mixing at r...