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Adsorption & Affecting Factors of Attapulgite to Cd~(2+)

Dai Rongling1 Zhang Gangya2 Hu Zhongsheng2,3 Zong Lianggang1(1 College of Resource and Environment Science,Nanjing Agricultural University,Nanjing 210095;2 Nanjing Institute of Soil Science,CAS,Nanjing 210008;3 Graduate school,CAS,Beijing 100039)  
The adsorption of attapulgite to cadmium ions was studied by indoor adsorption test.The results showed that attapulgite have a high affinity for cadmium ions,and sorption is affected by pH of solution evidently.It is advantageous to adsorption of cadmium ions that initial concentration is increased.Sorption is also affected by background electrolyte,and compared with natrium ions and kalium ions,sorption is affected by calcium ions more remarkably.
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