Importance of Organic Matter to the Retention and Transport of Bisphenol A and Bisphenol S in Saturated Soils

Shi, Yanfeng; Sun, Yuanyuan; Gao, Bin; Xu, Huaizhou; Wu, Jichun

doi:10.1007/s11270-019-4096-y

Cited by 14 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5a ). Also for this compound, the retention and transport in soil is strictly affected by the level of soil organic matter (Shi et al 2019 ). Hemp plants did not modify the vertical distribution of BPA in soil but were able to significantly reduce residual BPA in the upper 10 cm of the soil, compared with bare soil, contrasting leaching (Fig.…”

Section: Resultsmentioning

confidence: 99%

Single and combined use of Cannabis sativa L. and carbon-rich materials for the removal of pesticides and endocrine-disrupting chemicals from water and soil

Loffredo

Picca

Parlavecchia

2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

Hemp (Cannabis sativa L.) seedlings were used to remove from water the fungicide metalaxyl-M and the endocrine disruptor (EDC) bisphenol A (BPA) at concentrations ranging from 2 to 100 μg mL−1. In 7 days of exposure, despite the phytotoxicity of each compound that reduced elongation and biomass, the seedlings were able to remove between 67 and 94% of metalaxyl-M and between 86 and 95% of BPA. The amounts of metalaxyl-M and BPA extracted from plant dry biomass were in the range of 106–3861 μg g−1 and 16–101 μg g−1, respectively, and resulted positively correlated to both the dose of compound added (P ≤ 0.01) and the amount removed by the plants (P ≤ 0.01). Plant uptake and transformation were the main mechanisms involved in the removal of the compounds. In another set of experiments, hemp was used to remove a mixture of two pesticides, metalaxyl-M and metribuzin, and three EDCs, BPA, 17β-estradiol (E2), and 4-tert-octylphenol (OP), at concentrations of 10, 10, 10, 10, and 1 μg g−1, respectively, from soil column not added and added with 2.5% (w/w) of a green compost (CM) or a wood biochar (BC). In 25 days, plants did not alter considerably the distribution of the compounds along the soil profile and were capable of removing, on average, 12, 11, 10, 9, and 14% of metalaxyl-M, metribuzin, BPA, E2, and OP, respectively. During growth, hemp transformed the compounds and accumulated part of them (except OP) mainly in the shoots. CM and, especially, BC significantly protected the plants from the toxicity of the compounds and enhanced the retention of the latter in soil, contrasting leaching. Thus, the single or synergistic use of hemp and amendments deserves attention being a very low-cost and eco-sustainable strategy to remediate water and soil.

show abstract

Section: Resultsmentioning

confidence: 99%

Single and combined use of Cannabis sativa L. and carbon-rich materials for the removal of pesticides and endocrine-disrupting chemicals from water and soil

Loffredo

Picca

Parlavecchia

2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…For instance, the influence of clay minerals, the prominent components of soils, and the prevalent metal cations on the fate and transport of PFAS in near- and subsurface regions is poorly understood. Such fundamental insights are extremely important as both clay minerals and metal cations have been shown to greatly alter the distribution of other organic and inorganic species in natural settings. − Therefore, a systematic investigation of the adsorption and mobility of PFAS with different clay minerals varying in structural composition is of high importance. Furthermore, the accurate evaluation of the sorption characteristics of PFAS by constituents in soils will provide a route to make further progress in the mitigation strategies.…”

Section: Introductionmentioning

confidence: 99%

Adsorption, Structure, and Dynamics of Short- and Long-Chain PFAS Molecules in Kaolinite: Molecular-Level Insights

Loganathan

Wilson

2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

The ubiquitous presence of poly-and perfluoroalkyl substances (PFAS) in different natural settings poses a serious threat to environmental and human health. Soils and sediments represent one of the important exposure pathways of PFAS for humans and animals. With increasing bioaccumulation and mobility, it is extremely important to understand the interactions of PFAS molecules with the dominant constituents of soils such as clay minerals. This study reports for the first time the fundamental molecular-level insights into the adsorption, interfacial structure, and dynamics of short-and long-chain PFAS molecules at the water-saturated mesopores of kaolinite clay using classical molecular dynamics (MD) simulations. At environmental conditions, all the PFAS molecules are exclusively adsorbed near the hydroxyl surface of the kaolinite, irrespective of the terminal functional groups and metal cations. The interfacial adsorption structures and coordination environments of PFAS are strongly dependent on the nature of the functional groups and their hydrophobic chain length. The formation of large, aggregated clusters of long-chain PFAS at the hydroxyl surface of kaolinite is responsible for their restricted dynamics in comparison to short-chain PFAS molecules. Such comprehensive knowledge of PFAS at the clay mineral interface is critical to developing novel site-specific degradation and mitigation strategies.

show abstract

“…The interaction of organic and biomolecules with smectite (clay mineral) surfaces is central to various geochemical, industrial, and environmental processes including the biogeochemistry of soils; − the fate and transport of heavy metals, − radionuclides, and organic contaminants; − the performance assessment of filtration membranes; ,, and the global carbon balance. − Natural organic matter (NOM) is a complex mixture of compounds derived from the natural decay of plant matter and microbes, giving NOM a heterogeneous distribution of functional groups, structures, compositions, and molecular weights. As a result, NOM is ubiquitous in terrestrial and aquatic environments that support life and exhibits complex (and potentially regiospecific) interactions with minerals and suspended solids. − It has been shown that NOM molecules associate with one another in aqueous solution and that NOM readily adsorbs onto many mineral surfaces including micas (a type of phyllosilicate closely related to smectites), altering the surface properties and impacting the distribution and transport of organic and inorganic species in the environment. − …”

Section: Introductionmentioning

confidence: 99%

A Mechanistic Exploration of Natural Organic Matter Aggregation and Surface Complexation in Smectite Mesopores

et al. 2020

View full text Add to dashboard Cite

Soil minerals and organic matter play critical roles in nutrient cycling and other life-essential biogeochemical processes, yet the structural and dynamical details of natural organic matter (NOM) film formation on smectites are not fully understood on the molecular scale. XRD of Suwannee River NOM–hectorite (a smectite clay) complexes shows that the humic and fulvic components of NOM bind predominantly at the external surfaces of packets of smectite platelets rather than in the interlayer slit pores, suggesting that the key behavior governing smectite–NOM interactions takes place in mesopores between smectite particles. New molecular dynamics modeling of a ∼110 Å H2O-saturated smectite mesopore at near-neutral pH shows that model NOM molecules initially form small clusters of 2–3 NOM molecules near the center of the pore fluid. Formation of these clusters is driven by the hydrophobic mechanism, where aromatic/aliphatic regions associate with one another to minimize their interactions with H2O, and charge-balancing cations associated with the deprotonated carboxylate sites are located only at the outer surface of these clusters. Despite hydrophobicity driving the initial clustering, NOM clusters are formed more quickly when high-charge-density cations like Ca2+ are present vs low-charge-density cations like Cs+, as the former cations more effectively minimize the electrostatic repulsions between the negatively charged NOM molecules. Once the small hydrophobicity-driven NOM clusters form, the simulations show that Ca2+ promotes the aggregation of NOM clusters through tetradentate Ca2+ bridges involving carboxylate groups on two different NOM clusters. Importantly, our studies indicate that Ca2+ plays a crucial role in binding the NOM clusters to the smectite surface, which occurs through multiple quaternary complexes (Ob)–H2O–Ca2+–COO‑ NOM. In contrast, Cs+ never forms any coordination or acts like bridges between NOM molecules nor as ion bridges to the smectite surface. Additionally, we observe the formation of a metastable superaggregate involving all 16 NOM molecules several times in a Ca2+-bearing mesopore fluid. Superaggregates are never observed in the simulations involving Cs+. The modeling results are fully consistent with helium ion microscope images of NOM–hectorite complexes suggesting that NOM surface films develop when preformed NOM clusters interact with smectite surfaces. Overall, the binding of NOM clusters to the outer surfaces of smectite particles and the formation of large NOM aggregates at neutral pH occur through cation bridging, and cation bridging only occurs when high-charge-density cations like Ca2+ are present.

show abstract

Importance of Organic Matter to the Retention and Transport of Bisphenol A and Bisphenol S in Saturated Soils

Cited by 14 publications

References 35 publications

Single and combined use of Cannabis sativa L. and carbon-rich materials for the removal of pesticides and endocrine-disrupting chemicals from water and soil

Single and combined use of Cannabis sativa L. and carbon-rich materials for the removal of pesticides and endocrine-disrupting chemicals from water and soil

Adsorption, Structure, and Dynamics of Short- and Long-Chain PFAS Molecules in Kaolinite: Molecular-Level Insights

A Mechanistic Exploration of Natural Organic Matter Aggregation and Surface Complexation in Smectite Mesopores

Contact Info

Product

Resources

About