酸改性天然火山灰吸附去除水中磷污染物

Adsorptive Removal of Phosphate by Volcanic Tephra after Modified withAcidic Solution

天然火山灰矿物材料经盐酸溶液改性后,可有效吸附去除水中磷污染物。改性用盐酸适宜浓度为1mol/L,1g改性后火山灰投加入30 mL 50 mg/L磷溶液中(pH值近中性),磷去除率为92.02%;磷吸附行为符合Langmuir等温吸附方程,磷饱和吸附量为1.24 mg/g。

Volcanic tephra mineral modified by hydrochloric acid solution was effective for removal of phosphorus pollutant. The suitable concentration of hydrochloric acid medium was 1 mol/L, the phosphorus removal efficiency was 92.02% when 1 g acid modified volcanic tephra was added into 30 mL 50 mg/L phosphorus solution （pH value close to neutral）. The adsorption behavior fit for Langmuir adsorption isotherm, the maximum adsorption capacity for phosphorus was 1.24 mg/g.