Biochar mediates activation of aged nanoscale ZVI by Shewanella putrefaciens CN32 to enhance the degradation of Pentachlorophenol

Li, Hui; Chen, Shuai; Ren, Lu Yao; Zhou, Li Yang; Tan, Xue Jun; Zhu, Yu; Belver, Carolina; Bedia, Jorge; Yang, Jie

doi:10.1016/j.cej.2019.02.099

Cited by 45 publications

(13 citation statements)

References 57 publications

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“…Pentachlorophenol (PCP) is widely used as a pesticide and disinfectant [14]. Due to its high toxicity (including probable carcinogenicity) and resistance to natural degradation, PCP has been listed as a priority pollutant by the US EPA [15]. PCP mainly collects in sediments and soils, but can also enter groundwater [16,17].…”

Section: Introductionmentioning

confidence: 99%

Insights into interactions between vanadium (V) bio-reduction and pentachlorophenol dechlorination in synthetic groundwater

Zhang

Cheng

Shi

et al. 2019

Chemical Engineering Journal

106

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Aquifer co-contamination by vanadium (V) and pentachlorophenol (PCP) involves complicated biogeochemical processes that remain poorly understood, particularly from the perspective of microbial metabolism. Batch experiment results demonstrated that V(V) and PCP could be competitively bio-reduced, with 96.0 ± 1.8% of V(V) and 43.4 ± 4.6% of PCP removed during 7 d operation. V(V) was bio-transformed to vanadium (IV), which could precipitate naturally under circumneutral conditions, facilitating the removal of up to 78.2 ± 3.1% dissolved total V. The PCP reductive dechlorination products were mainly 2,4,6-trichlorophenol and 4-monochlorophenol with lower toxicity. High-throughput 16S rRNA gene sequencing indicated that Pseudomonas, Soehngenia, and Anaerolinea might be responsible for the two bio-transformations, with detected functional genes of nirS and cprA. Extracellular reduction by cytochrome c and intracellular conversion by nicotinamide adenine dinucleotide (NADH) occurred for both V(V) and PCP. Extracellular proteins in microbial-secreted extracellular polymeric substances (EPS) might also be involved in these enzymatic bioprocesses. EPS could protect microbial cells through V(V) binding by the chemically reactive carboxyl (COO-), and hydroxyl (-OH) groups. These findings elucidate the metabolic processes during anaerobic V(V) and PCP biotransformation, advance understanding of their biogeochemical fates, and provide a foundation on which to develop novel strategies for remediation of co-contaminated aquifers.

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Section: Introductionmentioning

confidence: 99%

Insights into interactions between vanadium (V) bio-reduction and pentachlorophenol dechlorination in synthetic groundwater

Zhang

Cheng

Shi

et al. 2019

Chemical Engineering Journal

106

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“…It has been pointed out that some bacteria could promote the synthesis of vivianite by regulating the biosynthesis of extracellular polymeric substances (EPS) through tricarboxylic acid cycle, amino acid metabolism, and purine metabolism; SOM could enhance the biosynthesis of vivianite by up-regulating the expression of electron transfer activity-, flagella-, and metal ion binding-related genes . Besides, the secondary minerals of iron oxyhydroxide could play an important role in the biodechlorination of organochlorines. , According to previous study, nZVI could be gradually transformed to vivianite during the biodegradation of PCP, and the formed minerals could further promote the microbial degradation of PCP by acting as electron donors . The mechanisms on electron transfer are detailed below.…”

Section: Resultsmentioning

confidence: 99%

“…The stock solution of HA was prepared by dissolving HA powders in 1 mL of NaOH solution (0.5 mol/L). After dilution with 200 mL of the mineral medium (1.0 g/L NH 4 Cl, 0.4 g/L K 2 HPO 4 , 0.1 g/L MgCl 2 ·6H 2 O, and 0.05 g/L CaCl 2 ·H 2 O, pH = 7.0 ± 0.2), the solution was filtered through a 0.22 μm nylon membrane . Silt-sand soil samples (silt 80.73%, sand 18.76%, and clay 0.51%) were collected from a paddy field in Huzhou, Zhejiang Province, China (N 30°39′43.99″, E 119°55′30.82″).…”

Section: Methodsmentioning

confidence: 99%

“…After dilution with 200 mL of the mineral medium (1.0 g/L NH 4 Cl, 0.4 g/L K 2 HPO 4 , 0.1 g/L MgCl 2 •6H 2 O, and 0.05 g/L CaCl 2 •H 2 O, pH = 7.0 ± 0.2), the solution was filtered through a 0.22 μm nylon membrane. 29 Silt-sand soil samples (silt 80.73%, sand 18.76%, and clay 0.51%) were collected from a paddy field in Huzhou, Zhejiang Province, China (N 30°39′43.99″, E 119°55′30.82″). The soil was analyzed using an X-ray fluorescence spectrometer (Bruker, Germany) 30 and an organic element analyzer (Elementar Analy-sensysteme GmbH, Germany), 31 with the analytical results detailed in Table S2.…”

Section: Methodsmentioning

confidence: 99%

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Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Liu

Wang

et al. 2022

Environ. Sci. Technol.

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Nanoscale zero-valent iron (nZVI) provides a promising solution for organochlorine (OC)-contaminated soil remediation. However, the interactions among nZVI, soil organic matter (SOM), and indigenous dechlorinating bacteria are intricate, which may result in unascertained effects on the reductive degradation of OCs and merits specific investigation. Herein, we isolated an indigenous dehalogenation bacterium (Burkholderia ambifaria strain L3) from a paddy soil and further investigated the biodechlorination of pentachlorophenol (PCP) with individual and a combination of SOM and nZVI. In comparison with individual-strain L3 treatment, the cotreatment with nZVI or SOM increased the removal efficiency of PCP from 34.4 to 44.3–54.2% after 15 day cultivation. More importantly, a synergistic effect of SOM and nZVI was observed on the PCP removal by strain L3, and the PCP removal efficiency reached up to 75.3–84.5%. Other than the biodegradation through ortho- and meta-substitution under the individual application of SOM or nZVI, PCP was further biodegraded to 2,4,6-trichlorophenol (TCP) through para-substitution by the isolated bacteria with the cotreatment of SOM and nZVI. The main roles of the nZVI–SOM cotreatment in the biodegradation included the SOM-facilitated microbial proliferation, the nZVI-promoted microbial transformation of SOM, and the induced higher electron transport capacity of redox Fe-PCP biocycling. These findings provide a novel insight into the action of nZVI in environmental remediations.

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“…When the observed catalytic activity of zero-valent iron nanoparticles is considered this improved stability may be important for the use of this class of materials in the remediation of water. Another species of bacteria that demonstrated an interaction with nZVI was Shewanella putrefaciens CN32 which were reported by Yang et al [188] to greatly increase the reduction of pentachlorophenol by these nanoparticles when deposited on a biochar base (size range, 40-50 nm). The bacterial reduced the nanoparticles through the biochar and prevented loss of activity through aging.…”

Section: Microbial/magnetic Nanocompositesmentioning

confidence: 97%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.

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Biochar mediates activation of aged nanoscale ZVI by Shewanella putrefaciens CN32 to enhance the degradation of Pentachlorophenol

Cited by 45 publications

References 57 publications

Insights into interactions between vanadium (V) bio-reduction and pentachlorophenol dechlorination in synthetic groundwater

Insights into interactions between vanadium (V) bio-reduction and pentachlorophenol dechlorination in synthetic groundwater

Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

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