@article {Godinho2019,
	title = {Recovery of Cr(III) by using chars from the co-gasification of agriculture and forestry wastes},
	journal = {Environmental Science and Pollution Research},
	volume = {26},
	number = {22},
	year = {2019},
	note = {n/a},
	month = {Aug},
	pages = {22723{\textendash}22735},
	abstract = {<p>The aim of the present work was to assess the efficiency of biochars obtained from the co-gasification of blends of rice husk{\th}inspace}+{\th}inspace}corn cob (biochar 50CC) and rice husk{\th}inspace}+{\th}inspace}eucalyptus stumps (biochar 50ES), as potential renewable low-cost adsorbents for Cr(III) recovery from wastewaters. The two gasification biochars presented a weak porous structure (ABET{\th}inspace}={\th}inspace}63{\textendash}144~m2~g-1), but a strong alkaline character, promoted by a high content of mineral matter (59.8{\%} w/w of ashes for 50CC biochar and 81.9{\%} w/w for 50ES biochar). The biochars were used for Cr(III) recovery from synthetic solutions by varying the initial pH value (3, 4, and 5), liquid/solid (L/S) ratio (100{\textendash}500~mL~g-1), contact time (1{\textendash}120~h), and initial Cr(III) concentration (10{\textendash}150~mg~L-1). High Cr(III) removal percentages (around 100{\%}) were obtained for both biochars, due to Cr precipitation, at low L/S ratios (100 and 200~mL~g-1), for the initial pH 5 and initial Cr concentration of 50~mg~L-1. Under the experimental conditions in which other removal mechanisms rather than precipitation occurred, a higher removal percentage (49.9{\%}) and the highest uptake capacity (6.87~mg~g-1) were registered for 50CC biochar. In the equilibrium, 50ES biochar presented a Cr(III) removal percentage of 27{\%} with a maximum uptake capacity of 2.58~mg~g-1. The better performance on Cr(III) recovery for the biochar 50CC was attributed to its better textural properties, as well as its higher cation exchange capacity.</p>
},
	issn = {1614-7499},
	doi = {10.1007/s11356-019-05609-w},
	url = {https://doi.org/10.1007/s11356-019-05609-w},
	author = {Godinho, Delfina and Nogueira, Miguel and Bernardo, Maria and Diogo Dias and Nuno Lapa and Fonseca, Isabel and Filomena Pinto}
}
