A review on adsorption characteristics and influencing mechanism of heavy metals in farmland soil

Yu, Hanjing; Li, Chenchen; Jin, Yan; Ma, Yaoqiang; Zhou, Xinyu; Yu, Wanquan; Kan, Huiying; Meng, Qi; Xie, Ruosong; Dong, Peng

doi:10.1039/d2ra07095b

Cited by 32 publications

(14 citation statements)

References 135 publications

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“…18 Various chemical mechanisms are involved in the adsorption process, including ion exchange, cationbridging, ion-dipole interactions, ligand exchange, charge transfer, hydrogen bonding, and van der Waals forces. Furthermore, current study by Yu et al 19 has shown that a number of variables, including pH, temperature, and the presence of other environmental pollutants, affect the sorption of pesticides. Phosphoric, phosphonic, or phosphoramidic acid can form ester or thiol derivatives that are mostly organophosphorus compounds.…”

Section: Introductionmentioning

confidence: 92%

Decoding Coumaphos: Tracing its journey in the lithosphere via degradation mechanisms and assessing sorption proficiency through kinetics study

Majid,

Ahmad,

A. A.

et al. 2023

Int J of Chemical Kinetics

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The fate of Coumaphos in the environment was evaluated through meticulous emulation and analysis of the intricate pedospheric matrices. The fate‐determinative investigations entailed a meticulous examination of Coumaphos's behavior, encompassing adsorption and desorption characteristics and its decomposition rate via hydrolysis, photolysis, and intrinsic biological degradation in soil. The interactions between Coumaphos molecules and soils were found to be robust, with physiosorption being the predominant mode of interaction. Thermodynamic analysis, based on the negative values of Gibbs free energy (−23,569 to −15,798 kJ/mol), indicated exothermic and spontaneous adsorption processes. The highest adsorption capacity (Kd(ads) = 34.97 μg/mL) was observed in soils with a notable organic matter content (1.99%), exhibiting a C‐type isotherm that was confirmed through linear and Freundlich models. Analytical techniques such as ultraviolet‐visible spectrophotometry and gas chromatography‐mass spectrometry were employed to determine the fate of Coumaphos in soil matrices. The minimum half‐lives of Coumaphos in hydrolysis, biodegradation, and photolysis experiments were 203, 52, and 69 days, respectively. These findings highlight the strong affinity of Coumaphos for the selected agricultural soils, indicating limited potential for transformation. Moreover, findings highlight the potential for further optimization of these degradative routes to devise practical strategies for environmental remediation utilizing natural processes.

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Section: Introductionmentioning

confidence: 92%

Decoding Coumaphos: Tracing its journey in the lithosphere via degradation mechanisms and assessing sorption proficiency through kinetics study

Majid,

Ahmad,

A. A.

et al. 2023

Int J of Chemical Kinetics

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“…7,20,21 The utilization of raw materials from nature as well as their modified varieties and hybrids for the elimination of metals has been recognized as the most efficient method of purification, considering some essential factors such as availability, affordability, scalability, and environmental concerns. 22,23 Bentonite and related derivatives have received a great deal of attention as exceptionally efficient adsorbents. 24,25 Bentonite is a frequently employed geological term that refers to a kind of sedimentary rock that primarily consists of smectite clay minerals, specifically montmorillonite, along with other varieties of clay minerals.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous investigations have advised the employment of both synthetic and natural adsorbents for adsorption-mediated elimination of soluble metal ions such as Cd(II). This approach is regarded as a simple, reliable, and cost-effective elimination method. ,, Nevertheless, the investigation of appropriate adsorbents remains a compelling area of study, implementing crucial criteria for selection including material accessibility, manufacturing expenses, recycling potential, adsorption capacity, equilibrium behavior, and kinetic rates. ,, The utilization of raw materials from nature as well as their modified varieties and hybrids for the elimination of metals has been recognized as the most efficient method of purification, considering some essential factors such as availability, affordability, scalability, and environmental concerns. , …”

Section: Introductionmentioning

confidence: 99%

Enhanced Retention of Cd(II) by Exfoliated Bentonite and Its Methoxy Form: Steric and Energetic Studies

Abukhadra,

Nasser,

El-Sherbeeny

et al. 2024

ACS Omega

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Synergistic studies were conducted to evaluate the retention potentiality of exfoliating bentonite (EXBEN) as well as its methanol hybridization derivative (Mth/EXBEN) toward Cd(II) ions to be able to verify the effects of the transformation processes. The adsorption characteristics were established by considering the steric and energetic aspects of the implemented advanced equilibrium simulation, specifically the monolayer model with a single energy level. Throughout the full saturation states, the adsorption characteristics of Cd(II) increased substantially to 363.7 mg/g following the methanol hybridized treatment in comparison to EXBEN (293.2 mg/g) as well as raw bentonite (BEN) (187.3 mg/g). The steric analysis indicated a significant rise in the levels of the active sites following the exfoliation procedure [retention site density (N m ) = 162.96 mg/g] and the chemical modification with methanol [retention site density (N m ) = 157.1 mg/g]. These findings clarify the improvement in the potential of Mth/EXBEN to eliminate Cd(II). Furthermore, each open site of Mth/EXBEN has the capacity to bind approximately three ions of Cd(II) in a vertically aligned manner. The energetic investigations, encompassing the Gaussian energy (less than 8 kJ/mol) plus the adsorption energy (less than 40 kJ/mol), provide evidence of the physical sequestration of Cd(II). This process may involve the collaborative impacts of dipole binding forces (ranging from 2 to 29 kJ/mol) and hydrogen binding (less than 30 kJ/mol). The measurable thermodynamic functions, particularly entropy, internal energy, and free enthalpy, corroborate the exothermic and spontaneous nature of Cd(II) retention by Mth/ EXBEN, as opposed to those by EXBEN and BE.

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“…8 Nanozymes have diverse advantages, including low usage and high efficiency in crop enhancement. Thus, nanozymes have been used to alleviate plant abiotic stress in various ways, 9 such as reducing stress caused by salinity, 10 temperature fluctuations, 11,12 drought, 13 waterlogging, 14 soil heavy metal pollution, 15 etc. For instance, Chen et al found that nano Fe 2 O 3 could increase the photosynthesis and biomass of peanuts.…”

Section: Introductionmentioning

confidence: 99%

Carbon Dot Nanozyme for Enhancement of Yield and Quality in Maize through Multimechanism Joint Effects

Zhang,

Ding,

Feng

et al. 2024

ACS Agric. Sci. Technol.

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Maize production plays a crucial role in ensuring global food security. However, the utilization of nanozymes in enhancing maize yield and quality has rarely been reported. In this work, for the first time, the preparation and application of carbon dot (CD) nanozymes to improve maize yield and quality are presented. The Michaelis−Menten equation demonstrates that CD nanozymes exhibit excellent enzymatic kinetic characteristics, thereby possessing catalase-like enzyme activity. The enzyme-like activity of CDs effectively mitigates oxidative damage caused by the external environment in maize. Moreover, CDs have the capability to convert solar ultraviolet light into bright blue light, enhancing the levels of essential elements such as Mg, Fe, and Zn in maize. Consequently, this promotes chlorophyll synthesis and photosynthesis. Furthermore, confocal imaging verifies that CDs can easily penetrate maize cells and subsequently regulate the endogenous antioxidant enzyme activity of maize. This leads to a reduction in peroxidation metabolites of malondialdehyde and an increase in antioxidant small molecule substances such as glutathione and ascorbic acid (VC). The combined effects mentioned above significantly increase maize yield by approximately 20% in planting experiments while also improving its nutritional quality. This study sheds light on the potential application of nanozymes in enhancing the maize yield and quality.

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A review on adsorption characteristics and influencing mechanism of heavy metals in farmland soil

Abstract: The accumulation of heavy metals in soil and crops is considered to be a severe environmental problem due to its various harmful effects on animals and plants.

Cited by 32 publications

References 135 publications

Decoding Coumaphos: Tracing its journey in the lithosphere via degradation mechanisms and assessing sorption proficiency through kinetics study

Decoding Coumaphos: Tracing its journey in the lithosphere via degradation mechanisms and assessing sorption proficiency through kinetics study

Enhanced Retention of Cd(II) by Exfoliated Bentonite and Its Methoxy Form: Steric and Energetic Studies

Carbon Dot Nanozyme for Enhancement of Yield and Quality in Maize through Multimechanism Joint Effects

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