@article {yang2017adsorption,
	title = {Adsorption of ammonium in aqueous solutions by pine sawdust and wheat straw biochars},
	journal = {Environmental Science and Pollution Research},
	year = {2017},
	pages = {1{\textendash}10},
	publisher = {Springer Berlin Heidelberg},
	author = {Yang, Hye In and Lou, Kangyi and Rajapaksha, Anushka Upamali and Sik Ok, Yong and Anyia, Anthony O and Chang, Scott X}
}
