铁-镧系合金吸附剂对水中磷的吸附性能研究  被引量:1

Research on the adsorption capacity of iron-lanthanide alloy adsorbent for phosphorus in water

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作  者:杨永珠[1] 江映翔[1] 刘艳冰 李志林[1] 陈金梦[1] 孙文灏[1] 李江燕[1] 

机构地区:[1]昆明理工大学环境科学与工程学院,云南昆明650093 [2]云南碧蓝环境工程有限公司,云南昆明650034

出  处:《工业水处理》2013年第8期33-36,62,共5页Industrial Water Treatment

摘  要:采用共沉淀法制备了不同掺铁量的铁-镧系合金吸附剂。实验结果表明:存在一个最佳掺铁量,以铁、镧物质的量比为0.08的吸附剂除磷能力最强。与掺铁量为零的吸附剂相比.铁-镧系合金吸附剂对磷酸根的吸附量明显提高。吸附剂的吸附行为符合伪二级反应速率方程,吸附等温线可用Langmuir方程更好地描述。该吸附剂的吸附量受pH影响显著,pH在4~7时,吸附量大且稳定,酸性条件更有利于吸附反应的进行。Iron-lanthanide alloy adsorbents doped with different amount of iron have been prepared by co-precipita- tion method. The experimental results show that:there has been an optimum iron doping dosage. The phosphorus re- moving rate of the adsorbent is the strongest when irordlanthanide quantitative ratio is 0.08. Compared with the ad- sorbent whose iron-doped quantity is zero, the iron-lanthanide alloy adsorbent exhibits a higher phosphate removing efficiency. The adsorption behavior complies with the pseudo-second-order kinetics equation. Langmuir equation can describe the adsorption isotherm better. The adsorption capacity of the adsorbent can be significantly influenced by pH. When pH is 4-7, the adsorptive capacity is greater and more stable, and acidic conditions are more propitious to adsorption reaction.

关 键 词:铁-镧系合金吸附剂 磷酸根 吸附 

分 类 号:X703[环境科学与工程—环境工程]

 

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