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OALib Journal期刊
ISSN: 2333-9721
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向日葵根分泌物对水合铁氧化物（hfo）吸附cd2＋的促进效应
DOI: 10.3724/SP.J.1145.2010.00033, PP. 33-37
Keywords: 水合铁氧化物,镉,吸附,根分泌物,向日葵
Abstract:
研究了向日葵（helianthusannuus）根分泌物对水合铁氧化物（hfo）吸附cd2+的行为的影响.结果表明，向日葵根分泌物具有促进hfo吸附cd2+的作用.随着ph升高，hfo对cd2+的平衡吸附量增加，向日葵根分泌物促进了hfo对镉的吸附.langmuir方程和freundlich方程可用来描述hfo对cd2+的等温吸附行为，拟二级速率方程可描述hfo对cd2+的吸附动力学.等温吸附参数和吸附动力学参数表明向日葵根分泌物增加了hfo吸附cd2+的速率、强度及吸附容量.hfo吸附cd2+是一个熵增的吸热反应.向日葵根分泌物的存在使hfo对cd2+的吸附更容易自发.图4表3参19
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