摘要
为研究超微粉碎对荸荠皮吸附重金属离子性能的影响,分别进行了粉碎10、30、60 min的荸荠皮超微粉和荸荠皮粗粉对Hg2+、Cd2+和Pb2+的吸附试验。结果表明,超微粉碎处理能使荸荠皮对重金属离子的吸附能力显著增强,粉碎10 min的荸荠皮超微粉对Hg2+、Cd2+和Pb2+的最大吸附量分别达到0.0148、35.25和100.46μg/g,吸附能力比粗粉分别提高约142.62%、83.21%和153.43%。超微粉碎10 min后,荸荠皮对Cd2+的吸附能力没有明显变化,但对Hg2+和Pb2+的吸附量有一定下降。3种重金属离子共存时产生了竞争吸附,其中Hg2+和Pb2+之间的竞争吸附较为明显。
To study the effect of ultra-fine pulverization on the adsorption capacity for heavy metal ions of Eleocharis tuberose peel,the adsorption for Hg2＋,Cd2＋ and Pb2＋ on the coarse powder and ultra-fine powder of Eleocharis tuberose peel is investigated,the ultra-fine powder was acquired by ultra-fine pulverization the Eleocharis tuberose peel for 10,30 and 60 minutes.The results showed that the adsorption capacity for heavy metal ions of Eleocharis tuberose peel can be increased apparently by ultra-fine pulverization.The maximum adsorption amounts for Hg2＋,Cd2＋ and Pb2＋ by Eleocharis tuberose peel ultra-fine powder pulverized for 10 minutes arrived 0.0148,35.25 and 100.46 μg/g respectively,that are higher than the coarse powder with maximum absorption amounts about 142.62%,83.21% and 153.43% respectively.When the pulverization time was more than 10 minutes,no apparent change had been made to the adsorption capacity of the powder for Cd2＋,but decreased for Hg2＋ and Pb2＋.Competitive adsorption was emerged when different ions were coexists,that will be more stiff between Hg2＋ and Pb2＋ when they coexist in the solution.
出处
《广东农业科学》
CAS
CSCD
北大核心
2011年第10期91-93,共3页
Guangdong Agricultural Sciences
基金
广西自然科学基金(桂科自0991267)
广西环境工程与保护评价重点实验室研究基金(桂科能0804K023)
关键词
超微粉碎
荸荠皮
吸附
重金属
ultra-fine pulverization
Eleocharis tuberose peel
absorption
heavy metal ions
