At room temperature(25 ℃), urea and ferric chloride hexahydrate(system Ⅰ) or f erric nitrate nonahydrate(system Ⅱ) in a mole ratio of 6∶1 were mixed and ground finely in an agate mortar for 6 hours, a direc t soli...At room temperature(25 ℃), urea and ferric chloride hexahydrate(system Ⅰ) or f erric nitrate nonahydrate(system Ⅱ) in a mole ratio of 6∶1 were mixed and ground finely in an agate mortar for 6 hours, a direc t solid state reaction occurred. IR and elemental analysis confirmed the products obtained are the com- plexes of urea with ir on(Ⅲ).展开更多
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;60 min为吸附平衡时间;对于100 m L 5 mg/L的模拟含磷废水,投加改性硅藻土0.6 g,磷去除率...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;60 min为吸附平衡时间;对于100 m L 5 mg/L的模拟含磷废水,投加改性硅藻土0.6 g,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。展开更多
文摘At room temperature(25 ℃), urea and ferric chloride hexahydrate(system Ⅰ) or f erric nitrate nonahydrate(system Ⅱ) in a mole ratio of 6∶1 were mixed and ground finely in an agate mortar for 6 hours, a direc t solid state reaction occurred. IR and elemental analysis confirmed the products obtained are the com- plexes of urea with ir on(Ⅲ).
文摘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;60 min为吸附平衡时间;对于100 m L 5 mg/L的模拟含磷废水,投加改性硅藻土0.6 g,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。