Trivalent Vanadium Precipitation in Siderite-Dependent Vanadate Bioreduction by Denitrifying Bacteria in Groundwater.

Vanadium (V) is a redox-sensitive metal with three valence states (+3, +4, +5) in Earth's surficial environment. The microbially mediated transformation of hazardous vanadate [V(V)] plays a pivotal role in V geochemistry and detoxification. Tetravalent V [V(IV)] is the most common species resulting from V(V) bioreduction, but it is susceptible to reoxidation and release during redox fluctuation.

Fractionation of water-soluble organic matter (WSOM) with polyvinylpyrrolidone: A study on antimony associated with WSOM in contaminated soils.

Water-soluble organic matter (WSOM) significantly influences the transport of metals and organic contaminants in soils, yet the interaction specifics with antimony (Sb) remain largely unexplored. Antimony is of particular environmental concern due to its toxic properties and harmful effects on ecosystems and human health. Employing a three-step fractionation method with polyvinylpyrrolidone (PVP), this study aimed to isolate and analyze humic acids (HA), PVP-non adsorbed fulvic acids (FAA), and PVP-adsorbed fulvic acids (FAB) from WSOM in soil spiked with Sb and incubated for 18 months.

Carbon-based amendments for sustainable remediation of arsenic-contaminated paddy soils: An insight to greenhouse gases.

Soil organic carbon (SOC) affects biogeochemistry of arsenic (As) in soil, however, response of As bioavailability in different-textured soils to SOC sources remained partially explored. Therefore, two texturally different natural As-contaminated soils were used to unveil immobilization of As, soil biochemical health and carbon dynamics in soil fractions using different carbon-based organic amendments (biogas slurry (BGS), cow dung (CD), farmyard manure (FYM), biochar (BC), commercial coal, sugarcane bagasse (SCB) and lignite (LIG)). Results showed a significant reduction in As concentration by 25-89 % in the sandy loam soil and 24-78 % in the clay loam soil maximum with CD and BC application.

Green synthesized MgO combined with dielectric barrier discharge plasma enhanced phosphorus (P) recovery from livestock wastewater: A dual approach for management of wastewater and P resources.

Phosphorus (P) recovery from wastewater using integrated techniques i.e., adsorption combined with advanced oxidation technologies is a novel approach for cleaning wastewater and preventing eutrophication.

Characterization of per- and polyfluoroalkyl substances (PFASs) in Chinese river and lake sediments.

Sediment pollution by per- and polyfluoroalkyl substances (PFASs) is an emerging environmental concern with far-reaching implications, attracting considerable public, scientific and regulatory attention. This study analyzed 72 articles published since 2010 to assess the accumulation, sources, spatiotemporal trends, and contributing factors of PFAS pollution in surface sediments across China. The total concentrations of PFASs at the reviewed sites ranged from 0.

Integrating spectroscopic analysis and theoretical calculations to elucidate the adsorption efficiency and mechanisms of Cd, Pb, and Cu using novel carboxymethyl cellulose/pectin-based hydrogel beads.

Herein, a series of novel carboxymethyl cellulose (CMC)/pectin-based hydrogel beads were synthesized with chitosan as a cross-linker. The hydrogel composites were denoted as CPC-1/2/3/4/5, with varying mass ratios of CMC, pectin, and chitosan (6:0:1, 5:1:1, 4:2:1, 3:3:1, and 2:4:1). This is a pioneering study that investigates the synergistic effects of these biopolymers in a single hydrogel system for the adsorption of heavy metals, specifically Cd, Pb, and Cu.

Immobilization of per- and polyfluorinated alkyl substances (PFAS) from field contaminated groundwater by a novel organo-clay vs. colloidal activated carbon under flow conditions.

Two novel and unique adsorptive materials, one (Fluorolock®) from clay mineral sepiolite coated with the cationic polymer polydiallyldimethylammionium chloride (pDADMAC) and the other (Intraplex®) from colloidal activated carbon were specially developed for the in situ remediation of per- and polyfluoroalkyl substances (PFAS) in the saturated zone. We evaluated the potential of both materials to immobilize PFAS in soils under flow conditions via soil column experiments using groundwater, which was contaminated with PFAS in the field. Furthermore, the potential ecotoxicological effects of both materials on aquatic organisms were assessed by exposing the soil column effluent to Daphnia magna.

Tungsten contamination, behavior and remediation in complex environmental settings.

Tungsten (W) is a rare element and present in the earth's crust mainly as iron, aluminium, and calcium minerals including wolframite and scheelite. This review aims to offer an overview on the current knowledge on W pollution in complex environmental settlings, including terrestrial and aquatic ecosystems, linking to its natural and anthropogenic sources, behavior in soil and water, environmental and human health hazards, and remediation strategies. Tungsten is used in many alloys mainly as wafers, which have wide industrial applications, such as incandescent light bulb filaments, X-ray tubes, arc welding electrodes, radiation shielding, and industrial catalysts.

Synergistic effect of biochar and intercropping on lead phytoavailability in the rhizosphere of a vegetable-grass system.

The effects of engineered steam exploded biochar on the phytoavailability of toxic elements in the shared- and nonshared-rhizosphere of vegetable-grass intercropping system have not been investigated yet. Therefore, we explored and elucidated the synergistic effect of pristine rape-straw biochar (BC), steam exploded BC (BCSE), KMnO-modified BCSE (BCSEMn), and hydroxyapatite-modified BCSE (BCSEHA) on the solubility, fractionation and phytoavailability of lead (Pb) in a vegetable-grass intercropping system. In a rhizosphere box, Brassica chinensis L.

Challenges and opportunities in commercializing whole-cell bioreporters in environmental application.

Since the initial introduction of whole-cell bioreporters (WCBs) nearly 30 years ago, their high sensitivity, selectivity, and suitability for on-site detection have rendered them highly promising for environmental monitoring, medical diagnosis, food safety, biomanufacturing, and other fields. Especially in the environmental field, the technology provides a fast and efficient way to assess the bioavailability of pollutants in the environment. Despite these advantages, the technology has not been commercialized.

A critical review on the organo-metal(loid)s pollution in the environment: Distribution, remediation and risk assessment.

Toxic metal(loid)s, e.g., mercury, arsenic, lead, and cadmium are known for several environmental disturbances creating toxicity to humans if accumulated in high quantities.

Biodegradation of bisphenol-A in water using a novel strain of Xenophilus sp. embedded onto biochar: Elucidating the influencing factors and degradation pathway.

Bisphenol-A (BPA) is an emerging hazardous contaminant, which is ubiquitous in the environment and can cause endocrine disruptor and cancer risks. Therefore, biodegradation of BPA is an essential issue to mitigate the associated human health. In this work, a bacterial strain enables of degrading BPA, named BPA-LRH8 (identified as Xenophilus sp.

Nano-enabled strategies to promote safe crop production in heavy metal(loid)-contaminated soil.

Nanobiotechnology is a potentially safe and sustainable strategy for both agricultural production and soil remediation, yet the potential of nanomaterials (NMs) application to remediate heavy metal(loid)-contaminated soils is still unclear. A meta-analysis with approximately 6000 observations was conducted to quantify the effects of NMs on safe crop production in soils contaminated with heavy metal(loid) (HM), and a machine learning approach was used to identify the major contributing features. Applying NMs can elevate the crop shoot (18.

A comprehensive review on agricultural waste utilization through sustainable conversion techniques, with a focus on the additives effect on the fate of phosphorus and toxic elements during composting process.

The increasing trend of using agricultural wastes follows the concept of "waste to wealth" and is closely related to the themes of sustainable development goals (SDGs). Carbon-neutral technologies for waste management have not been critically reviewed yet. This paper reviews the technological trend of agricultural waste utilization, including composting, thermal conversion, and anaerobic digestion.

A field trial for remediation of multi-metal contaminated soils using the combination of fly ash stabilization and Zanthoxylumbungeanum- Lolium perenne intercropping system.

Insitu stabilization and phytoextraction are considered as two convenient and effective technologies for the remediation of toxic elements (TEs) in soils. However, the effectiveness of these two remediation technologies together on the bioavailability and phytoextraction of TEs in field trials has not been explored yet. Specifically, the remediation potential of fly ash (FA; as stabilizing agent) and ryegrass (as a TE accumulator) intercropped with a target crop for soil polluted with multiple TEs has not been investigated yet, particularly in long-term field trials.