Adsorption of Sudan IV from oily wastewater by using modified activated carbon materials

Díaz de Tuesta, Jose Luis; Guliyeva, Rima; Martin-Martinez, Maria; Silva, Adrián; Faria, Joaquim; Gomes, Helder

Publication

Adsorption of Sudan IV from oily wastewater by using modified activated carbon materials

2016Conference object

dc.contributor.author	Díaz de Tuesta, Jose Luis
dc.contributor.author	Guliyeva, Rima
dc.contributor.author	Martin-Martinez, Maria
dc.contributor.author	Silva, Adrián
dc.contributor.author	Faria, Joaquim
dc.contributor.author	Gomes, Helder
dc.date.accessioned	2017-01-12T14:47:33Z
dc.date.available	2017-01-12T14:47:33Z
dc.date.issued	2016
dc.description.abstract	A commercial activated carbon (AC: Norit ROX 0.8, D = 0.8 mm) was modified by chemical and thermal processes, following the procedures described elsewhere [1]. The materials were tested as adsorbents for the removal of a lipophilic pollutant, Sudan IV (S-IV), using a biphasic medium (water/cyclohexane) in order to simulate contaminated petroleum mixtures with water [2]. The AC was modified in successive steps considering: (1) grinding and sieving (< 250 μm) and (2) treatment with nitric acid, followed by hydrotreatment with urea and thermal treatment at 800 ºC under inert atmosphere, resulting in the adsorbents PAC and PACNAUT, respectively. Adsorption experiments were performed in a 500 mL batch glass reactor, using 2.5 g of adsorbent per litre of organic phase, 2.5 g/LOP. Fig.1A shows results with different particle size (ps), initial S-IV concentration (CS-IV,0) and AC modifications. As expected, it can be observed that adsorption is faster when ps is smaller. However, the powdered activated carbon (PAC) is not able to adsorb all S-IV in high initial concentration (500 mg/L). This target was achieved with PACNAUT (adsorption of S-IV was 90 % at 1 h and 2.5 g/LOP of adsorbent, higher than the removal observed by other authors [2] at the same time and 4 g/LOP of material). The adsorption kinetics was fitted by a pseudo-second-order model to the data obtained with 500 mg/L of CS-IV,0 (Fig. 1B). PACNAUT has higher adsorption capacity (qe) and rate constant (kS).	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Díaz de Tuesta, Jose; Guliyeva, Rima; Martin-Martinez, Maria; Silva, Adrián; Faria, Joaquim; Gomes, Helder (2016). Adsorption of Sudan IV from oily wastewater by using modified activated carbon materials. In XXII Encontro Luso-Galego de Química. Bragança	pt_PT
dc.identifier.uri	http://hdl.handle.net/10198/13743
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Carbon	pt_PT
dc.title	Adsorption of Sudan IV from oily wastewater by using modified activated carbon materials	pt_PT
dc.type	conference object
dspace.entity.type	Publication
oaire.citation.conferencePlace	Bragança	pt_PT
oaire.citation.endPage	189	pt_PT
oaire.citation.startPage	189	pt_PT
oaire.citation.title	XXII Encontro Luso-Galego de Química	pt_PT
person.familyName	Díaz de Tuesta
person.familyName	Gomes
person.givenName	Jose Luis
person.givenName	Helder
person.identifier.ciencia-id	7A1F-022B-7DBF
person.identifier.ciencia-id	6218-1E19-13EE
person.identifier.orcid	0000-0003-2408-087X
person.identifier.orcid	0000-0001-6898-2408
person.identifier.rid	D-9785-2017
person.identifier.scopus-author-id	55755821600
rcaap.rights	openAccess	pt_PT
rcaap.type	conferenceObject	pt_PT
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