Mn2+ promoted Cr(VI) reduction with oxalic acid: The indispensable role of In-situ generated Mn3+

Mu, Yi; Jiang, Xu; Ai, Zhihui; Jia, Falong; Zhang, Lizhi

doi:10.1016/j.jhazmat.2017.10.008

Cited by 60 publications

(24 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Green synthesis of nanoparticles has received attention due to its use of environment-friendly precursors for nanoparticles synthesis with many other advantages such as economic viability, ease of production, eco-friendly nature, avoiding the use of harmful chemicals, conditions of high temperature and pressure, and the expensive instruments required for physical and chemical methods. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Microorganisms have the ability to reduce heavy metal salts to metal nanoparticles with a narrow size distribution due to the presence of various reductase enzymes. 15 In a previous report, silver nanoparticles and PbS quantum dots were synthesized by Aspergillus sp.…”

Section: Introductionmentioning

confidence: 99%

Management of wilt disease of chickpea in vivo by silver nanoparticles biosynthesized by rhizospheric microflora of chickpea (Cicer arietinum)

Kaur

Thakur

Duhan

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND This work reports the isolation and screening of rhizospheric microflora of chickpea and their role in the biosynthesis of silver nanoparticles (AgNPs). The antifungal potential of AgNPs for control of wilt disease of chickpea, caused by Fusarium oxysporum f. sp. ciceri (FOC) was evaluated in vitro and in vivo pot experiments. The effect of AgNPs on seed germination and soil community was also evaluated. RESULTS Among microbial strains, two bacteria, Pseudomonas sp. and Achromobacter sp. and two fungi, Trichoderma sp. and Cephalosporium sp., were identified for biosynthesis of AgNPs. AgNPs were confirmed by UV‐visible spectra (λ = 420 nm) and transmission electron microscopy (TEM) with size 20–50 nm. AgNPs showed very high antifungal activity (95%) against FOC in vitro at 100 µgmL−1 concentration. Pot experiments showed maximum and minimum reduction in wilt incidence over control, i.e. 73.33% for AgNPs and copper‐oxychloride (CuOCl) i.e. 26.67%, respectively. Seeds coated with AgNPs showed high germinability up to 98% and no negative impact was observed on soil community. CONCLUSION This study demonstrated the role of AgNPs against the fungal disease of chickpea that can be extended to other diseases of chickpea and other important Indian crops. © 2018 Society of Chemical Industry

show abstract

Section: Introductionmentioning

confidence: 99%

Management of wilt disease of chickpea in vivo by silver nanoparticles biosynthesized by rhizospheric microflora of chickpea (Cicer arietinum)

Kaur

Thakur

Duhan

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Along with the reduction process, the increasing trend of reduction efficiency of Cr(VI) became smooth due to the formation of a soluble Cr(III)-organic products, which formed by Cr 3+ and oxalate (Eq. (4)) 21 . In order to enhance the reduction process of Cr(VI), the high dosage of oxalic acid should be added as there was no enough oxalate to reduce Cr(VI) at a lower dosage of oxalic acid.…”

mentioning

confidence: 99%

Reduction behavior of chromium(VI) with oxalic acid in aqueous solution

Peng

Guo

2020

Sci Rep

View full text Add to dashboard Cite

The direct Cr(VI) reduction process by oxalic acid was conducted. The existence of Cr(VI) in the reaction medium was measured by software Visual MINTEQ and the concentration of Cr(VI) was measured by ICP-OES. The results showed that the Cr(VI) was efficiently reduced by oxalic acid at high reaction temperature and high dosage of oxalic acid. The reduced product, Cr(III), was easily generated stable complex compounds (Cr(HC2O4)3) with oxalate, which displayed a negative effect on the reduction process. The high reaction temperature and high acidic medium could destroy the stable structure of a complex compound to release oxalate, and facilitate the reduction of Cr(VI). Generally, the results showed in this paper provided a versatile strategy for Cr(VI) reduction and exhibited a bright application future for real wastewater treatment.

show abstract

“…Aer 7 days, the presence of Cr(VI) was reduced greatly, indicating that oxalic acid reduced Cr(VI) to Cr(III) and the Cr(III)-oxalate complex was very stable. 11,18,19 2HCrO 4 À + 3HC 2 O 4 À + 11H + / 2Cr 3+ + 6CO 2 + 8H 2 O (8)…”

Section: Resultsmentioning

confidence: 99%

“…8 (a) The effect of contact time on the adsorption of Cr on MFA, (b) the linear fit obtained using the pseudo-first-order model, (c) the linear fit obtained using the pseudo-second-order model, and (d) the linear fit obtained using the intra-particle diffusion model. charges at the active sites on the surface of MFA (eqn (10) and (11)), which allow Cr 3+ to be complexed on the surface (eqn (12) and (13)), are as follows: 25 SiOH + OH À /^SiO À + H 2 O (10)…”

Section: Resultsmentioning

confidence: 99%

“…10 For example, under specic conditions, MnO 2 can accelerate the reduction of Cr(VI) in the presence of oxalic acid and also produce a stable complex. 11 FA, the principle solid waste discharged from coal-red power plants, is one of the largest contributors to China's growing carbon footprint. Moreover, the improper disposal of FA leads to damaged lands and poisoned environments.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Cr(vi) from wastewater by a two-step method of oxalic acid reduction-modified fly ash adsorption

XiaoLing

Fan²,

Li³

et al. 2019

RSC Adv.

View full text Add to dashboard Cite

show abstract

Mn2+ promoted Cr(VI) reduction with oxalic acid: The indispensable role of In-situ generated Mn3+

Cited by 60 publications

References 43 publications

Management of wilt disease of chickpea in vivo by silver nanoparticles biosynthesized by rhizospheric microflora of chickpea (Cicer arietinum)

Management of wilt disease of chickpea in vivo by silver nanoparticles biosynthesized by rhizospheric microflora of chickpea (Cicer arietinum)

Reduction behavior of chromium(VI) with oxalic acid in aqueous solution

Removal of Cr(vi) from wastewater by a two-step method of oxalic acid reduction-modified fly ash adsorption

Contact Info

Product

Resources

About