Eco-approach for pharmaceutical removal: Thermochemical waste valorisation, biochar adsorption and electro-assisted regeneration
In the present research, an eco-approach for the removal of pharmaceuticals from aqueous environment was developed under de principles of circular economy. Therefore, an eco-friendly adsorbent, biochar, was synthesized by the thermochemical valorisation of rice production waste. The rice bran was py...
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| Veröffentlicht in: | Electrochimica acta 2021-09, Vol.389, p.138694, Article 138694 |
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| creator | Escudero-Curiel, Silvia Acevedo-García, Valeria Sanromán, Mª Ángeles Pazos, Marta |
| description | In the present research, an eco-approach for the removal of pharmaceuticals from aqueous environment was developed under de principles of circular economy. Therefore, an eco-friendly adsorbent, biochar, was synthesized by the thermochemical valorisation of rice production waste. The rice bran was pyrolyzed at different temperatures (300–750°C) and a thermal post-treatment was evaluated with the aim to investigate its impact on characteristics and chemical composition of biochars. The obtained biochars were assayed for the removal of a model target pollutant, fluoxetine (FLX), and the biochar adsorption process was characterized in detail. The biochar obtained after the pyrolysis process at 500°C and autoclave post-treatment (BC500A) achieved the highest pollutant removal (92.6%). The pseudo-2nd order kinetic and Freundlich isotherm described well the process, and the primary adsorption mechanism was explained by electrostatic attractions. After that, the regeneration of this eco-friendly adsorbent was evaluated by an innovative electro-Fenton-like process using peroxymonosulfate (PMS) as oxidant agent. To our knowledge, this is the first attempt to regenerate biochar using this combined technology. The optimization of operational variables such as current intensity, PMS/FLX ratio, electrode material, and addition of enhancing agents (Fe and citric acid) were evaluated. The regeneration of spent biochar was effectively accomplished under the optimal conditions (150 mA, 75/1 PMS/FLX, and 0.15 mM citric acid). No external addition of Fe was necessary because the metal content on biochar was enough for the reaction to take place. Finally, 5 cycles of adsorption-regeneration were performed demonstrating the viability of the developed system. Accordingly, the proposed approach fits with the principles of circular economy, because the global removal of pollutant and valorisation of wastes were achieved. |
| doi_str_mv | 10.1016/j.electacta.2021.138694 |
| format | Article |
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Therefore, an eco-friendly adsorbent, biochar, was synthesized by the thermochemical valorisation of rice production waste. The rice bran was pyrolyzed at different temperatures (300–750°C) and a thermal post-treatment was evaluated with the aim to investigate its impact on characteristics and chemical composition of biochars. The obtained biochars were assayed for the removal of a model target pollutant, fluoxetine (FLX), and the biochar adsorption process was characterized in detail. The biochar obtained after the pyrolysis process at 500°C and autoclave post-treatment (BC500A) achieved the highest pollutant removal (92.6%). The pseudo-2nd order kinetic and Freundlich isotherm described well the process, and the primary adsorption mechanism was explained by electrostatic attractions. After that, the regeneration of this eco-friendly adsorbent was evaluated by an innovative electro-Fenton-like process using peroxymonosulfate (PMS) as oxidant agent. To our knowledge, this is the first attempt to regenerate biochar using this combined technology. The optimization of operational variables such as current intensity, PMS/FLX ratio, electrode material, and addition of enhancing agents (Fe and citric acid) were evaluated. The regeneration of spent biochar was effectively accomplished under the optimal conditions (150 mA, 75/1 PMS/FLX, and 0.15 mM citric acid). No external addition of Fe was necessary because the metal content on biochar was enough for the reaction to take place. Finally, 5 cycles of adsorption-regeneration were performed demonstrating the viability of the developed system. Accordingly, the proposed approach fits with the principles of circular economy, because the global removal of pollutant and valorisation of wastes were achieved.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2021.138694</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Adsorbents ; Adsorption ; Aqueous environments ; Biochar ; Chemical composition ; Citric acid ; Electro-Fenton-like ; Electrode materials ; Fluoxetine ; Heat treatment ; Iron ; Optimization ; Oxidizing agents ; Peroxymonosulfate ; Pharmaceutical ; Pharmaceuticals ; Pollutants ; Principles ; Pyrolysis ; Reagents ; Regeneration</subject><ispartof>Electrochimica acta, 2021-09, Vol.389, p.138694, Article 138694</ispartof><rights>2021</rights><rights>Copyright Elsevier BV Sep 1, 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c392t-210861e7703ad7ef5efe2dc10c374e5ea6f2066615943bf54ec9f38474e7b2a33</citedby><cites>FETCH-LOGICAL-c392t-210861e7703ad7ef5efe2dc10c374e5ea6f2066615943bf54ec9f38474e7b2a33</cites><orcidid>0000-0002-5454-9379 ; 0000-0001-9921-1278</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.electacta.2021.138694$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,3548,27922,27923,45993</link.rule.ids></links><search><creatorcontrib>Escudero-Curiel, Silvia</creatorcontrib><creatorcontrib>Acevedo-García, Valeria</creatorcontrib><creatorcontrib>Sanromán, Mª Ángeles</creatorcontrib><creatorcontrib>Pazos, Marta</creatorcontrib><title>Eco-approach for pharmaceutical removal: Thermochemical waste valorisation, biochar adsorption and electro-assisted regeneration</title><title>Electrochimica acta</title><description>In the present research, an eco-approach for the removal of pharmaceuticals from aqueous environment was developed under de principles of circular economy. Therefore, an eco-friendly adsorbent, biochar, was synthesized by the thermochemical valorisation of rice production waste. The rice bran was pyrolyzed at different temperatures (300–750°C) and a thermal post-treatment was evaluated with the aim to investigate its impact on characteristics and chemical composition of biochars. The obtained biochars were assayed for the removal of a model target pollutant, fluoxetine (FLX), and the biochar adsorption process was characterized in detail. The biochar obtained after the pyrolysis process at 500°C and autoclave post-treatment (BC500A) achieved the highest pollutant removal (92.6%). The pseudo-2nd order kinetic and Freundlich isotherm described well the process, and the primary adsorption mechanism was explained by electrostatic attractions. After that, the regeneration of this eco-friendly adsorbent was evaluated by an innovative electro-Fenton-like process using peroxymonosulfate (PMS) as oxidant agent. To our knowledge, this is the first attempt to regenerate biochar using this combined technology. The optimization of operational variables such as current intensity, PMS/FLX ratio, electrode material, and addition of enhancing agents (Fe and citric acid) were evaluated. The regeneration of spent biochar was effectively accomplished under the optimal conditions (150 mA, 75/1 PMS/FLX, and 0.15 mM citric acid). No external addition of Fe was necessary because the metal content on biochar was enough for the reaction to take place. Finally, 5 cycles of adsorption-regeneration were performed demonstrating the viability of the developed system. Accordingly, the proposed approach fits with the principles of circular economy, because the global removal of pollutant and valorisation of wastes were achieved.</description><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Aqueous environments</subject><subject>Biochar</subject><subject>Chemical composition</subject><subject>Citric acid</subject><subject>Electro-Fenton-like</subject><subject>Electrode materials</subject><subject>Fluoxetine</subject><subject>Heat treatment</subject><subject>Iron</subject><subject>Optimization</subject><subject>Oxidizing agents</subject><subject>Peroxymonosulfate</subject><subject>Pharmaceutical</subject><subject>Pharmaceuticals</subject><subject>Pollutants</subject><subject>Principles</subject><subject>Pyrolysis</subject><subject>Reagents</subject><subject>Regeneration</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFUEtLxDAQDqLg-vgNBrzaNWnapPW2iC8QvOg5zKZTN8u2qZPuijd_utld8SoMDMz3mJmPsQspplJIfb2c4grdCKmmucjlVKpK18UBm8jKqExVZX3IJkJIlRW60sfsJMalEMJoIybs-86FDIaBArgFbwPxYQHUgcP16B2sOGEXNrC64a8LpC64BXa7-SfEEXlCAvkIow_9FZ_7hANxaGKgYTvj0Dd8dx-lNTH6JGqS5zv2SDvVGTtqYRXx_Lefsrf7u9fbx-z55eHpdvacOVXnY5ZLUWmJxggFjcG2xBbzxknhlCmwRNBtLrTWsqwLNW_LAl3dqqpIoJnnoNQpu9z7plc_1hhHuwxr6tNKm5e6MqIUhUkss2c5CjEStnYg3wF9WSnsNm67tH9x223cdh93Us72SkxPbDySjc5j77DxlPi2Cf5fjx-HEpAY</recordid><startdate>20210901</startdate><enddate>20210901</enddate><creator>Escudero-Curiel, Silvia</creator><creator>Acevedo-García, Valeria</creator><creator>Sanromán, Mª Ángeles</creator><creator>Pazos, Marta</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>6I.</scope><scope>AAFTH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-5454-9379</orcidid><orcidid>https://orcid.org/0000-0001-9921-1278</orcidid></search><sort><creationdate>20210901</creationdate><title>Eco-approach for pharmaceutical removal: Thermochemical waste valorisation, biochar adsorption and electro-assisted regeneration</title><author>Escudero-Curiel, Silvia ; Acevedo-García, Valeria ; Sanromán, Mª Ángeles ; Pazos, Marta</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c392t-210861e7703ad7ef5efe2dc10c374e5ea6f2066615943bf54ec9f38474e7b2a33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Adsorbents</topic><topic>Adsorption</topic><topic>Aqueous environments</topic><topic>Biochar</topic><topic>Chemical composition</topic><topic>Citric acid</topic><topic>Electro-Fenton-like</topic><topic>Electrode materials</topic><topic>Fluoxetine</topic><topic>Heat treatment</topic><topic>Iron</topic><topic>Optimization</topic><topic>Oxidizing agents</topic><topic>Peroxymonosulfate</topic><topic>Pharmaceutical</topic><topic>Pharmaceuticals</topic><topic>Pollutants</topic><topic>Principles</topic><topic>Pyrolysis</topic><topic>Reagents</topic><topic>Regeneration</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Escudero-Curiel, Silvia</creatorcontrib><creatorcontrib>Acevedo-García, Valeria</creatorcontrib><creatorcontrib>Sanromán, Mª Ángeles</creatorcontrib><creatorcontrib>Pazos, Marta</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Escudero-Curiel, Silvia</au><au>Acevedo-García, Valeria</au><au>Sanromán, Mª Ángeles</au><au>Pazos, Marta</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Eco-approach for pharmaceutical removal: Thermochemical waste valorisation, biochar adsorption and electro-assisted regeneration</atitle><jtitle>Electrochimica acta</jtitle><date>2021-09-01</date><risdate>2021</risdate><volume>389</volume><spage>138694</spage><pages>138694-</pages><artnum>138694</artnum><issn>0013-4686</issn><eissn>1873-3859</eissn><abstract>In the present research, an eco-approach for the removal of pharmaceuticals from aqueous environment was developed under de principles of circular economy. 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To our knowledge, this is the first attempt to regenerate biochar using this combined technology. The optimization of operational variables such as current intensity, PMS/FLX ratio, electrode material, and addition of enhancing agents (Fe and citric acid) were evaluated. The regeneration of spent biochar was effectively accomplished under the optimal conditions (150 mA, 75/1 PMS/FLX, and 0.15 mM citric acid). No external addition of Fe was necessary because the metal content on biochar was enough for the reaction to take place. Finally, 5 cycles of adsorption-regeneration were performed demonstrating the viability of the developed system. 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| subjects | Adsorbents Adsorption Aqueous environments Biochar Chemical composition Citric acid Electro-Fenton-like Electrode materials Fluoxetine Heat treatment Iron Optimization Oxidizing agents Peroxymonosulfate Pharmaceutical Pharmaceuticals Pollutants Principles Pyrolysis Reagents Regeneration |
| title | Eco-approach for pharmaceutical removal: Thermochemical waste valorisation, biochar adsorption and electro-assisted regeneration |
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