FeS-biochar and Zn(0)-biochar for Remediation of Redox-reactive Contaminants

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 6

PMID 35518218

Authors

Yong-Deuk Seo

Seok-Young Oh

Rajesh Rajagopal

Kwang-Sun Ryu

Affiliations

Soon will be listed here.

Abstract

To enhance the removal of redox-reactive contaminants, biochars including FeS and Zn(0) were developed pyrolysis. These biochars significantly promoted the removal of 2,4-dichlorophenol (DCP) by means of sorption and reduction. Compared to direct reduction with FeS and Zn(0), the formation of reduction intermediates and product was enhanced from 21% and 22% of initial DCP concentration to 41% and 52%, respectively. 2,4-Dinitrotoluene (DNT), chromate (CrO ) and selenate (SeO ) were also reductively transformed to reduction products (, 2,4-diaminotoluene [DAT], Cr, and selenite [SeO ]) after they sorbed onto the biochars including FeS and Zn(0). Mass recovery as DAT, Cr and selenite was 4-20%, 1-3%, and 10-30% under the given conditions. Electrochemical and X-ray analyses confirmed the reduction capability of the biochars including FeS and Zn(0). Fe and S in the FeS-biochar did not effectively promote the reductive transformation of the contaminants. Contrastingly, the stronger reducer Zn(0) yielded faster reductive transformation of contaminants over the Zn(0)-containing biochar, while not releasing high concentrations of Zn into the aqueous phase. Our results suggest that biochars including Zn(0) may be suitable as dual sorbents/reductants to remediate redox-reactive contaminants in natural environments.

References

Xiao X, Chen B, Chen Z, Zhu L, Schnoor J . Insight into Multiple and Multilevel Structures of Biochars and Their Potential Environmental Applications: A Critical Review. Environ Sci Technol. 2018; 52(9):5027-5047. PMC: 6402350. DOI: 10.1021/acs.est.7b06487. View

Oh S, Cha D, Chiu P . Graphite-mediated reduction of 2,4-dinitrotoluene with elemental iron. Environ Sci Technol. 2002; 36(10):2178-84. DOI: 10.1021/es011474g. View

Zhou L, Liu Y, Liu S, Yin Y, Zeng G, Tan X . Investigation of the adsorption-reduction mechanisms of hexavalent chromium by ramie biochars of different pyrolytic temperatures. Bioresour Technol. 2016; 218:351-9. DOI: 10.1016/j.biortech.2016.06.102. View

Liang L, Yang W, Guan X, Li J, Xu Z, Wu J . Kinetics and mechanisms of pH-dependent selenite removal by zero valent iron. Water Res. 2013; 47(15):5846-55. DOI: 10.1016/j.watres.2013.07.011. View

Dong H, Deng J, Xie Y, Zhang C, Jiang Z, Cheng Y . Stabilization of nanoscale zero-valent iron (nZVI) with modified biochar for Cr(VI) removal from aqueous solution. J Hazard Mater. 2017; 332:79-86. DOI: 10.1016/j.jhazmat.2017.03.002. View

Akhtar M, Nadeem M, Javaid S, Atif M . Cation distribution in nanocrystalline ZnFe(2)O(4) investigated using x-ray absorption fine structure spectroscopy. J Phys Condens Matter. 2011; 21(40):405303. DOI: 10.1088/0953-8984/21/40/405303. View

Su H, Fang Z, Tsang P, Zheng L, Cheng W, Fang J . Remediation of hexavalent chromium contaminated soil by biochar-supported zero-valent iron nanoparticles. J Hazard Mater. 2016; 318:533-540. DOI: 10.1016/j.jhazmat.2016.07.039. View

Gong Y, Tang J, Zhao D . Application of iron sulfide particles for groundwater and soil remediation: A review. Water Res. 2015; 89:309-20. DOI: 10.1016/j.watres.2015.11.063. View

Sun T, Levin B, Guzman J, Enders A, Muller D, Angenent L . Rapid electron transfer by the carbon matrix in natural pyrogenic carbon. Nat Commun. 2017; 8:14873. PMC: 5380966. DOI: 10.1038/ncomms14873. View

10.

Singh S, Vogel-Mikus K, Arcon I, Vavpetic P, Jeromel L, Pelicon P . Pattern of iron distribution in maternal and filial tissues in wheat grains with contrasting levels of iron. J Exp Bot. 2013; 64(11):3249-60. PMC: 3733147. DOI: 10.1093/jxb/ert160. View

11.

Chen S, Rotaru A, Shrestha P, Malvankar N, Liu F, Fan W . Promoting interspecies electron transfer with biochar. Sci Rep. 2014; 4:5019. PMC: 4028902. DOI: 10.1038/srep05019. View

12.

Adhikari A, Lin K . Synthesis, fine structural characterization, and CO2 adsorption capacity of metal organic frameworks-74. J Nanosci Nanotechnol. 2014; 14(4):2709-17. DOI: 10.1166/jnn.2014.8621. View

13.

Pignatello J, Mitch W, Xu W . Activity and Reactivity of Pyrogenic Carbonaceous Matter toward Organic Compounds. Environ Sci Technol. 2017; 51(16):8893-8908. DOI: 10.1021/acs.est.7b01088. View

14.

Oh S, Cha D, Kim B, Chiu P . Effect of adsorption to elemental iron on the transformation of 2,4,6-trinitrotoluene and hexahydro-1,3,5-trinitro-1,3,5-triazine in solution. Environ Toxicol Chem. 2002; 21(7):1384-9. View

15.

Oh S, Son J, Lim O, Chiu P . The role of black carbon as a catalyst for environmental redox transformation. Environ Geochem Health. 2011; 34 Suppl 1:105-13. DOI: 10.1007/s10653-011-9416-0. View

16.

Kang M, Chen F, Wu S, Yang Y, Bruggeman C, Charlet L . Effect of pH on aqueous Se(IV) reduction by pyrite. Environ Sci Technol. 2011; 45(7):2704-10. DOI: 10.1021/es1033553. View

17.

Ahn M, Dec J, Kim J, Bollag J . Treatment of 2,4-dichlorophenol polluted soil with free and immobilized laccase. J Environ Qual. 2002; 31(5):1509-15. DOI: 10.2134/jeq2002.1509. View

18.

Faria P, Orfao J, Pereira M . Adsorption of anionic and cationic dyes on activated carbons with different surface chemistries. Water Res. 2004; 38(8):2043-52. DOI: 10.1016/j.watres.2004.01.034. View

19.

He F, Li Z, Shi S, Xu W, Sheng H, Gu Y . Dechlorination of Excess Trichloroethene by Bimetallic and Sulfidated Nanoscale Zero-Valent Iron. Environ Sci Technol. 2018; 52(15):8627-8637. DOI: 10.1021/acs.est.8b01735. View

20.

Oh S, Seo Y, Ryu K . Reductive removal of 2,4-dinitrotoluene and 2,4-dichlorophenol with zero-valent iron-included biochar. Bioresour Technol. 2016; 216:1014-21. DOI: 10.1016/j.biortech.2016.06.061. View