Cr(VI) Reduction and Sequestration by FeS Nanoparticles Formed in situ as Aquifer Material Coating to Create a Regenerable Reactive Zone
Remediation of large and dilute plumes of groundwater contaminated by oxidized pollutants such as chromate is a common and difficult challenge. Herein, we show that in situ formation of FeS nanoparticles (using dissolved Fe(II), S(-II), and natural organic matter as a nucleating template) results in uniform coating of aquifer material to create a regenerable reactive zone that mitigates Cr(VI) migration. Flow-through columns packed with quartz sand are amended first with an Fe2+ solution and then with a HS- solution to form a nano-FeS coating on the sand, which does not hinder permeability. This nano-FeS coating effectively reduces and immobilizes Cr(VI), forming Fe(III)-Cr(III) coprecipitates with negligible detachment from the sand grains. Preconditioning the sand with humic or fulvic acid (used as model natural organic matter (NOM)) further enhances Cr(VI) sequestration, as NOM provides additional binding sites of Fe2+ and mediates both nucleation and growth of FeS nanoparticles, as verified with spectroscopic and microscopic evidence. Reactivity can be easily replenished by repeating the procedures used to form the reactive coating. These findings demonstrate that such enhancement of attenuation capacity can be an effective option to mitigate Cr(VI) plume migration and exposure, particularly when tackling contaminant rebound post source remediation.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2024 |
|---|---|
| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:58 |
|---|---|
| Enthalten in: |
Environmental science & technology - 58(2024), 16 vom: 23. Apr., Seite 7186-7195 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Liu, Zhenhai [VerfasserIn] |
|---|
| Links: |
|---|
| Anmerkungen: |
Date Completed 24.04.2024 Date Revised 24.04.2024 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1021/acs.est.3c10637 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM370880889 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM370880889 | ||
| 003 | DE-627 | ||
| 005 | 20240425233732.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 240411s2024 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1021/acs.est.3c10637 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1386.xml |
| 035 | |a (DE-627)NLM370880889 | ||
| 035 | |a (NLM)38598770 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Liu, Zhenhai |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Cr(VI) Reduction and Sequestration by FeS Nanoparticles Formed in situ as Aquifer Material Coating to Create a Regenerable Reactive Zone |
| 264 | 1 | |c 2024 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 24.04.2024 | ||
| 500 | |a Date Revised 24.04.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Remediation of large and dilute plumes of groundwater contaminated by oxidized pollutants such as chromate is a common and difficult challenge. Herein, we show that in situ formation of FeS nanoparticles (using dissolved Fe(II), S(-II), and natural organic matter as a nucleating template) results in uniform coating of aquifer material to create a regenerable reactive zone that mitigates Cr(VI) migration. Flow-through columns packed with quartz sand are amended first with an Fe2+ solution and then with a HS- solution to form a nano-FeS coating on the sand, which does not hinder permeability. This nano-FeS coating effectively reduces and immobilizes Cr(VI), forming Fe(III)-Cr(III) coprecipitates with negligible detachment from the sand grains. Preconditioning the sand with humic or fulvic acid (used as model natural organic matter (NOM)) further enhances Cr(VI) sequestration, as NOM provides additional binding sites of Fe2+ and mediates both nucleation and growth of FeS nanoparticles, as verified with spectroscopic and microscopic evidence. Reactivity can be easily replenished by repeating the procedures used to form the reactive coating. These findings demonstrate that such enhancement of attenuation capacity can be an effective option to mitigate Cr(VI) plume migration and exposure, particularly when tackling contaminant rebound post source remediation | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a FeS nanoparticles | |
| 650 | 4 | |a permeable reactive barrier | |
| 650 | 4 | |a plume control | |
| 650 | 4 | |a reactive zone | |
| 650 | 7 | |a Chromium |2 NLM | |
| 650 | 7 | |a 0R0008Q3JB |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 650 | 7 | |a chromium hexavalent ion |2 NLM | |
| 650 | 7 | |a 18540-29-9 |2 NLM | |
| 650 | 7 | |a Humic Substances |2 NLM | |
| 650 | 7 | |a Ferrous Compounds |2 NLM | |
| 650 | 7 | |a fulvic acid |2 NLM | |
| 650 | 7 | |a XII14C5FXV |2 NLM | |
| 650 | 7 | |a Benzopyrans |2 NLM | |
| 700 | 1 | |a Yang, Qihong |e verfasserin |4 aut | |
| 700 | 1 | |a Zhu, Panpan |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yaqi |e verfasserin |4 aut | |
| 700 | 1 | |a Tong, Xin |e verfasserin |4 aut | |
| 700 | 1 | |a Cao, Tianchi |e verfasserin |4 aut | |
| 700 | 1 | |a Tomson, Mason B |e verfasserin |4 aut | |
| 700 | 1 | |a Alvarez, Pedro J J |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Tong |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Wei |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Environmental science & technology |d 1967 |g 58(2024), 16 vom: 23. Apr., Seite 7186-7195 |w (DE-627)NLM112374735 |x 1520-5851 |7 nnns |
| 773 | 1 | 8 | |g volume:58 |g year:2024 |g number:16 |g day:23 |g month:04 |g pages:7186-7195 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1021/acs.est.3c10637 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 58 |j 2024 |e 16 |b 23 |c 04 |h 7186-7195 | ||