@article {31624,
	title = {Effects of Cu(II) on the Adsorption Behaviors of Cr(III) and Cr(VI) onto Kaolin.},
	journal = {Journal of Chemistry},
	volume = {2016},
	year = {2016},
	month = {2016/08/07},
	pages = {3069754},
	publisher = {Hindawi Publishing Corporation},
	abstract = {The adsorption of Cr(III) or Cr(VI) in the absence and presence of Cu(II) onto kaolin was investigated under pH 2.0{\textendash}7.0. Results indicated that the adsorption rate was not necessarily proportional to the adsorption capacity. The solutions{\textquoteright} pH values played a key role in kaolin zeta potential , especially the hydrolysis behavior and saturation index of heavy metal ions. In the presence of Cu(II), reached the maximum adsorption capacity of 0.73 mg{\textperiodcentered}g-1 at pH 6.0, while the maximum adsorption capacity for the mixed Cr(VI) and Cu(II) system () was observed at pH 2.0 (0.38 mg{\textperiodcentered}g-1). Comparing the adsorption behaviors and mechanisms, we found that kaolin prefers to adsorb hydrolyzed products of Cr(III) instead of Cr3+ ion, while adsorption sites of kaolin surface were occupied primarily by Cu(II) through surface complexation, leading to Cu(II) inhibited Cr(VI) adsorption. Moreover, Cr(III) and Cr(VI) removal efficiency had a positive correlation with distribution coefficient . Cr(III) and Cr(VI) removal efficiency had a positive correlation with distribution coefficient and that of adsorption affinities of Cr(III) or Cr(VI) on kaolin was found to be Cr(III) \&lt; Cr(III)-Cu(II) and Cr(VI) \&gt; Cr(VI)-Cu(II).},
	isbn = {2090-9063},
	url = {https://www.hindawi.com/journals/jchem/2016/3069754/},
	author = {Juanjuan Liu and Wu, Xiaolong and Yandi Hu and Chong Dai and Peng, Qin and Dongli* Liang},
	editor = {Kazemian, Hossein}
}
