Effective and stable adsorptive removal of Cadmium(II) and Lead(II) using selenium nanoparticles modified by microbial SmtA metallothionein
Metallothionein SmtA-modified selenium nanoparticles (SmtA-SeNPs), efficient adsorbents for Cd(II) and Pb(II), were synthesized in the present work. The ligand, microbial SmtA protein, was synthesized using an engineered strain Escherichia coli, posing the benefits of simplicity, safety, and high pr...
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Veröffentlicht in: | Chemosphere (Oxford) 2022-11, Vol.307, p.135818-135818, Article 135818 |
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creator | Zhou, Zijie Dong, Yixuan Zhu, Lin Xia, Xian Li, Sikui Wang, Gejiao Shi, Kaixiang |
description | Metallothionein SmtA-modified selenium nanoparticles (SmtA-SeNPs), efficient adsorbents for Cd(II) and Pb(II), were synthesized in the present work. The ligand, microbial SmtA protein, was synthesized using an engineered strain Escherichia coli, posing the benefits of simplicity, safety, and high production. SmtA-SeNPs were spheres with diameters between 68.1 and 122.4 nm, containing amino, hydroxyl, and sulfhydryl functional groups with negatively charged (pH > 5). SmtA-SeNPs displayed better adsorption performance than dissociative SmtA and SeNPs. The adsorption of Cd(II) and Pb(II) mainly depends on the electrostatic attractions and the metal chelation of abundant functional groups. The maximum adsorption capacity was 506.3 mg/g for Cd(II) and 346.7 mg/g for Pb(II), which were higher than the values of most nanoparticles. In addition, SmtA-SeNPs were immobilized with a membrane filter to produce a SmtA-SeNPs filter, and the percentage removal of Cd(II) and Pb(II) increased from 26.75% to 98.13% for Cd(II) and from 9.95% to 99.20% compared with the blank filter. Moreover, the SmtA-SeNPs filter was regenerated using subacid deionized water, and the filter exhibited a stable removal ratio of Cd(II) and Pb(II) in ten continuous cycles of Cd(II)- or Pb(II)-containing wastewater treatment. The residual amounts of Cd and Pb met national standard levels of wastewater discharge.
[Display omitted]
•Microbial SmtA is used to modify SeNPs to synthesize a new adsorbent, SmtA-SeNPs.•The synthetic method is simple to operate and has a high production.•The maximum adsorption value of SmtA-SeNPs exceeded that of other NPs.•SmtA-SeNPs filters show stable reusability in removing Cd and Pb in wastewater.•Functional groups and charges involved in metal adsorption on SmtA-SeNPs surfaces. |
doi_str_mv | 10.1016/j.chemosphere.2022.135818 |
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[Display omitted]
•Microbial SmtA is used to modify SeNPs to synthesize a new adsorbent, SmtA-SeNPs.•The synthetic method is simple to operate and has a high production.•The maximum adsorption value of SmtA-SeNPs exceeded that of other NPs.•SmtA-SeNPs filters show stable reusability in removing Cd and Pb in wastewater.•Functional groups and charges involved in metal adsorption on SmtA-SeNPs surfaces.</description><identifier>ISSN: 0045-6535</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2022.135818</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Adsorptive removal ; Cadmium ; Lead ; Metallothionein ; Selenium nanoparticles</subject><ispartof>Chemosphere (Oxford), 2022-11, Vol.307, p.135818-135818, Article 135818</ispartof><rights>2022 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c354t-66bbcacf4a2076b17775aab7a797a71551ee2bd7543c2dfd2d0a2300e255f8e63</citedby><cites>FETCH-LOGICAL-c354t-66bbcacf4a2076b17775aab7a797a71551ee2bd7543c2dfd2d0a2300e255f8e63</cites><orcidid>0000-0002-2823-551X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.chemosphere.2022.135818$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Zhou, Zijie</creatorcontrib><creatorcontrib>Dong, Yixuan</creatorcontrib><creatorcontrib>Zhu, Lin</creatorcontrib><creatorcontrib>Xia, Xian</creatorcontrib><creatorcontrib>Li, Sikui</creatorcontrib><creatorcontrib>Wang, Gejiao</creatorcontrib><creatorcontrib>Shi, Kaixiang</creatorcontrib><title>Effective and stable adsorptive removal of Cadmium(II) and Lead(II) using selenium nanoparticles modified by microbial SmtA metallothionein</title><title>Chemosphere (Oxford)</title><description>Metallothionein SmtA-modified selenium nanoparticles (SmtA-SeNPs), efficient adsorbents for Cd(II) and Pb(II), were synthesized in the present work. The ligand, microbial SmtA protein, was synthesized using an engineered strain Escherichia coli, posing the benefits of simplicity, safety, and high production. SmtA-SeNPs were spheres with diameters between 68.1 and 122.4 nm, containing amino, hydroxyl, and sulfhydryl functional groups with negatively charged (pH > 5). SmtA-SeNPs displayed better adsorption performance than dissociative SmtA and SeNPs. The adsorption of Cd(II) and Pb(II) mainly depends on the electrostatic attractions and the metal chelation of abundant functional groups. The maximum adsorption capacity was 506.3 mg/g for Cd(II) and 346.7 mg/g for Pb(II), which were higher than the values of most nanoparticles. In addition, SmtA-SeNPs were immobilized with a membrane filter to produce a SmtA-SeNPs filter, and the percentage removal of Cd(II) and Pb(II) increased from 26.75% to 98.13% for Cd(II) and from 9.95% to 99.20% compared with the blank filter. Moreover, the SmtA-SeNPs filter was regenerated using subacid deionized water, and the filter exhibited a stable removal ratio of Cd(II) and Pb(II) in ten continuous cycles of Cd(II)- or Pb(II)-containing wastewater treatment. The residual amounts of Cd and Pb met national standard levels of wastewater discharge.
[Display omitted]
•Microbial SmtA is used to modify SeNPs to synthesize a new adsorbent, SmtA-SeNPs.•The synthetic method is simple to operate and has a high production.•The maximum adsorption value of SmtA-SeNPs exceeded that of other NPs.•SmtA-SeNPs filters show stable reusability in removing Cd and Pb in wastewater.•Functional groups and charges involved in metal adsorption on SmtA-SeNPs surfaces.</description><subject>Adsorptive removal</subject><subject>Cadmium</subject><subject>Lead</subject><subject>Metallothionein</subject><subject>Selenium nanoparticles</subject><issn>0045-6535</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNqNUU1vGyEQRVUr1U37H-gtOawD7LLsHiMraS1Z6qHpGbEw1Fh8bGBtKb8hfzrE7qHHHNAwM-89zcxD6Dsla0pof3tY6z2EVOY9ZFgzwtiatnygwwe0ooMYG8rG4SNaEdLxpuct_4y-lHIgpJL5uEIv99aCXtwJsIoGl0VNvn5NSXk-V3NVPymPk8UbZYI7huvt9uYM3oEy5-RYXPyLC3iItY-jimlWeXHaQ8EhGWcdGDw94-B0TpOrcr_DcocDLMr7tOxdiuDiV_TJKl_g2794hf483D9ufja7Xz-2m7tdo1veLU3fT5NW2naKEdFPVAjBlZqEEmN9lHMKwCYjeNdqZqxhhijWEgKMcztA316h64vunNPTEcoigysavFcR0rFIJgjpO8baoULHC7TOXUoGK-fsgsrPkhL5ZoA8yP8MkG8GyIsBlbu5cKHucnKQZdEOogbjcj25NMm9Q-UVnBKXWQ</recordid><startdate>202211</startdate><enddate>202211</enddate><creator>Zhou, Zijie</creator><creator>Dong, Yixuan</creator><creator>Zhu, Lin</creator><creator>Xia, Xian</creator><creator>Li, Sikui</creator><creator>Wang, Gejiao</creator><creator>Shi, Kaixiang</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-2823-551X</orcidid></search><sort><creationdate>202211</creationdate><title>Effective and stable adsorptive removal of Cadmium(II) and Lead(II) using selenium nanoparticles modified by microbial SmtA metallothionein</title><author>Zhou, Zijie ; Dong, Yixuan ; Zhu, Lin ; Xia, Xian ; Li, Sikui ; Wang, Gejiao ; Shi, Kaixiang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c354t-66bbcacf4a2076b17775aab7a797a71551ee2bd7543c2dfd2d0a2300e255f8e63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Adsorptive removal</topic><topic>Cadmium</topic><topic>Lead</topic><topic>Metallothionein</topic><topic>Selenium nanoparticles</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhou, Zijie</creatorcontrib><creatorcontrib>Dong, Yixuan</creatorcontrib><creatorcontrib>Zhu, Lin</creatorcontrib><creatorcontrib>Xia, Xian</creatorcontrib><creatorcontrib>Li, Sikui</creatorcontrib><creatorcontrib>Wang, Gejiao</creatorcontrib><creatorcontrib>Shi, Kaixiang</creatorcontrib><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhou, Zijie</au><au>Dong, Yixuan</au><au>Zhu, Lin</au><au>Xia, Xian</au><au>Li, Sikui</au><au>Wang, Gejiao</au><au>Shi, Kaixiang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effective and stable adsorptive removal of Cadmium(II) and Lead(II) using selenium nanoparticles modified by microbial SmtA metallothionein</atitle><jtitle>Chemosphere (Oxford)</jtitle><date>2022-11</date><risdate>2022</risdate><volume>307</volume><spage>135818</spage><epage>135818</epage><pages>135818-135818</pages><artnum>135818</artnum><issn>0045-6535</issn><eissn>1879-1298</eissn><abstract>Metallothionein SmtA-modified selenium nanoparticles (SmtA-SeNPs), efficient adsorbents for Cd(II) and Pb(II), were synthesized in the present work. The ligand, microbial SmtA protein, was synthesized using an engineered strain Escherichia coli, posing the benefits of simplicity, safety, and high production. SmtA-SeNPs were spheres with diameters between 68.1 and 122.4 nm, containing amino, hydroxyl, and sulfhydryl functional groups with negatively charged (pH > 5). SmtA-SeNPs displayed better adsorption performance than dissociative SmtA and SeNPs. The adsorption of Cd(II) and Pb(II) mainly depends on the electrostatic attractions and the metal chelation of abundant functional groups. The maximum adsorption capacity was 506.3 mg/g for Cd(II) and 346.7 mg/g for Pb(II), which were higher than the values of most nanoparticles. In addition, SmtA-SeNPs were immobilized with a membrane filter to produce a SmtA-SeNPs filter, and the percentage removal of Cd(II) and Pb(II) increased from 26.75% to 98.13% for Cd(II) and from 9.95% to 99.20% compared with the blank filter. Moreover, the SmtA-SeNPs filter was regenerated using subacid deionized water, and the filter exhibited a stable removal ratio of Cd(II) and Pb(II) in ten continuous cycles of Cd(II)- or Pb(II)-containing wastewater treatment. The residual amounts of Cd and Pb met national standard levels of wastewater discharge.
[Display omitted]
•Microbial SmtA is used to modify SeNPs to synthesize a new adsorbent, SmtA-SeNPs.•The synthetic method is simple to operate and has a high production.•The maximum adsorption value of SmtA-SeNPs exceeded that of other NPs.•SmtA-SeNPs filters show stable reusability in removing Cd and Pb in wastewater.•Functional groups and charges involved in metal adsorption on SmtA-SeNPs surfaces.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.chemosphere.2022.135818</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0002-2823-551X</orcidid></addata></record> |
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title | Effective and stable adsorptive removal of Cadmium(II) and Lead(II) using selenium nanoparticles modified by microbial SmtA metallothionein |
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