Chars from co-gasification of rice wastes as Cr(III) removal agents

D. Dias; W. Ribeiro; N. Lapa; M. Bernardo; I. Matos; I. Fonseca; F. Pinto

doi:10.1201/9781315206172-13

Chars from co-gasification of rice wastes as Cr(III) removal agents

D. Dias, W. Ribeiro, N. Lapa, M. Bernardo, I. Matos, I. Fonseca, F. Pinto

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Rice husk (80% w/w) and polyethylene (20% w/w) were submitted for cogasification. The resulting char (GC) was characterized and used in Cr(III) liquid-phase removal assays. A Commercial Activated Carbon (CAC) was also used for comparison purposes. GC was mainly composed of ashes (68.3% w/w), with Si being the major mineral element and K the most soluble one. GC presented an alkaline character, which was responsible for an ecotoxic level in the char. In the Cr(III) removal assays, three Solid/Liquid ratios (S/L) were used: 2.5, 5.0 and 10.0 g L⁻¹. Generally, GC performed better than CAC: in the S/L of 10.0 g L^–1, GC removed 98.9% of Cr(III) (mainly by precipitation), while in the S/L of 5.0 g L^–1, GC removed 42.3% of Cr(III) by adsorption. The ionic exchanges of K⁺ from GC and Cr(III) in the liquid medium were the predominant removal mechanism.

Original language	English
Title of host publication	WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes
Subtitle of host publication	Solutions, Treatments and Opportunities, 2017
Editors	Maria de Lurdes Lopes, Cândida Vilarinho, Fernando Castro
Place of Publication	London
Publisher	CRC Press/Balkema
Pages	75-80
Number of pages	6
ISBN (Electronic)	9781315206172
ISBN (Print)	9781138196698
DOIs	https://doi.org/10.1201/9781315206172-13
Publication status	Published - 1 Jan 2018
Event	4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017 - Porto, Portugal Duration: 25 Sept 2017 → 26 Sept 2017

Conference

Conference	4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017
Country/Territory	Portugal
City	Porto
Period	25/09/17 → 26/09/17

Keywords

Activated carbon
Ion exchange
Wastes

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10.1201/9781315206172-13Licence: Unspecified

https://www.crcpress.com/WASTES-Solutions-Treatments-and-Opportunities-II-Selected-Papers-from/Vilarinho-Castro-Lopes/p/book/9781138196698Licence: Unspecified

Cite this

Dias, D., Ribeiro, W., Lapa, N., Bernardo, M., Matos, I., Fonseca, I., & Pinto, F. (2018). Chars from co-gasification of rice wastes as Cr(III) removal agents. In M. de Lurdes Lopes, C. Vilarinho, & F. Castro (Eds.), WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017 (pp. 75-80). CRC Press/Balkema. https://doi.org/10.1201/9781315206172-13

Dias, D. ; Ribeiro, W. ; Lapa, N. et al. / Chars from co-gasification of rice wastes as Cr(III) removal agents. WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017. editor / Maria de Lurdes Lopes ; Cândida Vilarinho ; Fernando Castro. London : CRC Press/Balkema, 2018. pp. 75-80

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abstract = "Rice husk (80% w/w) and polyethylene (20% w/w) were submitted for cogasification. The resulting char (GC) was characterized and used in Cr(III) liquid-phase removal assays. A Commercial Activated Carbon (CAC) was also used for comparison purposes. GC was mainly composed of ashes (68.3% w/w), with Si being the major mineral element and K the most soluble one. GC presented an alkaline character, which was responsible for an ecotoxic level in the char. In the Cr(III) removal assays, three Solid/Liquid ratios (S/L) were used: 2.5, 5.0 and 10.0 g L−1. Generally, GC performed better than CAC: in the S/L of 10.0 g L–1, GC removed 98.9% of Cr(III) (mainly by precipitation), while in the S/L of 5.0 g L–1, GC removed 42.3% of Cr(III) by adsorption. The ionic exchanges of K+ from GC and Cr(III) in the liquid medium were the predominant removal mechanism.",

keywords = "Activated carbon, Ion exchange, Wastes",

author = "D. Dias and W. Ribeiro and N. Lapa and M. Bernardo and I. Matos and I. Fonseca and F. Pinto",

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Dias, D, Ribeiro, W, Lapa, N , Bernardo, M , Matos, I , Fonseca, I & Pinto, F 2018, Chars from co-gasification of rice wastes as Cr(III) removal agents. in M de Lurdes Lopes, C Vilarinho & F Castro (eds), WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017. CRC Press/Balkema, London, pp. 75-80, 4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017, Porto, Portugal, 25/09/17. https://doi.org/10.1201/9781315206172-13

Chars from co-gasification of rice wastes as Cr(III) removal agents. / Dias, D.; Ribeiro, W.; Lapa, N. et al.
WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017. ed. / Maria de Lurdes Lopes; Cândida Vilarinho; Fernando Castro. London: CRC Press/Balkema, 2018. p. 75-80.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Dias, D.

AU - Ribeiro, W.

AU - Lapa, N.

AU - Bernardo, M.

AU - Matos, I.

AU - Fonseca, I.

AU - Pinto, F.

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N2 - Rice husk (80% w/w) and polyethylene (20% w/w) were submitted for cogasification. The resulting char (GC) was characterized and used in Cr(III) liquid-phase removal assays. A Commercial Activated Carbon (CAC) was also used for comparison purposes. GC was mainly composed of ashes (68.3% w/w), with Si being the major mineral element and K the most soluble one. GC presented an alkaline character, which was responsible for an ecotoxic level in the char. In the Cr(III) removal assays, three Solid/Liquid ratios (S/L) were used: 2.5, 5.0 and 10.0 g L−1. Generally, GC performed better than CAC: in the S/L of 10.0 g L–1, GC removed 98.9% of Cr(III) (mainly by precipitation), while in the S/L of 5.0 g L–1, GC removed 42.3% of Cr(III) by adsorption. The ionic exchanges of K+ from GC and Cr(III) in the liquid medium were the predominant removal mechanism.

AB - Rice husk (80% w/w) and polyethylene (20% w/w) were submitted for cogasification. The resulting char (GC) was characterized and used in Cr(III) liquid-phase removal assays. A Commercial Activated Carbon (CAC) was also used for comparison purposes. GC was mainly composed of ashes (68.3% w/w), with Si being the major mineral element and K the most soluble one. GC presented an alkaline character, which was responsible for an ecotoxic level in the char. In the Cr(III) removal assays, three Solid/Liquid ratios (S/L) were used: 2.5, 5.0 and 10.0 g L−1. Generally, GC performed better than CAC: in the S/L of 10.0 g L–1, GC removed 98.9% of Cr(III) (mainly by precipitation), while in the S/L of 5.0 g L–1, GC removed 42.3% of Cr(III) by adsorption. The ionic exchanges of K+ from GC and Cr(III) in the liquid medium were the predominant removal mechanism.

KW - Activated carbon

KW - Ion exchange

KW - Wastes

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Dias D, Ribeiro W, Lapa N , Bernardo M , Matos I , Fonseca I et al. Chars from co-gasification of rice wastes as Cr(III) removal agents. In de Lurdes Lopes M, Vilarinho C, Castro F, editors, WASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017. London: CRC Press/Balkema. 2018. p. 75-80 doi: 10.1201/9781315206172-13

Chars from co-gasification of rice wastes as Cr(III) removal agents

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