改性硅藻土处理含磷废水的试验研究

摘要

以硅藻土及硝酸铁为原料,制备了改性硅藻土,并进行了改性硅藻土吸附模拟含磷废水的试验研究.结果表明,改性硅藻土对磷的吸附率远高于硅藻土原土;60min为吸附平衡时间;对于100mL5mg/L的模拟含磷废水,投加改性硅藻土0.6g,磷去除率超过90%;酸性环境有利于磷的吸附;温度对改性硅藻土吸附磷影响不大;改性硅藻土对磷的吸附行为较符合Langmuir吸附等温式.%The modified diatomite was prepared by diatomite and iron(III)nitrate.The adsorption behav-iour of phosphorus on modified diatomite has also been studied.The results show that:the adsorption effect of modified diatomite is better than that of diatomite;the adsorption equilibrium time is 60 min;for 100 mL 5 mg/L phosphorus wastewater,adding 0.6 g modified diatomite,the phosphorus removal rate is over 90%;acidic conditions is good for phosphorus adsorption;temperature has small influence on modified di-atomite adsorbing phosphorus;the adsorption of phosphorus on modified diatomite fits with Langmuir iso-thermal equation.