Heavy metals in agricultural soil in China: A systematic review and meta-analysis

Wen, Moyan; Ma, Ziqi; Gingerich, Daniel B.; Zhao, Xinbing

doi:10.1016/j.eehl.2022.10.004

Cited by 49 publications

(19 citation statements)

References 46 publications

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“…Heavy metal pollution in soil is a major threat to plant production and ecosystem health ( Wen et al., 2022 ). To tackle this issue, phytoremediation is a widely employed approach, which uses the adsorption characteristics of plants to extract and remove pollutants in soil.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, heavy metal pollution in soil has become increasingly serious due to ore smelting and the excessive use of chemical fertilizers ( Ali et al., 2013b ). Pollution poses challenges to plant growth, agricultural production, and ecosystem health and even threatens human health and food safety ( Alsherif et al., 2022 ; Sarker et al., 2022 ; Wen et al., 2022 ). Heavy metals in soil persist for a long time because of their poor mobility and resistance to biodegradation.…”

Section: Introductionmentioning

confidence: 99%

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Physiological dynamics as indicators of plant response to manganese binary effect

Zheng

et al. 2023

Front. Plant Sci.

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IntroductionHeavy metals negatively affect plant physiology. However, plants can reduce their toxicity through physiological responses. Broussonetia papyrifera is a suitable candidate tree for carrying out the phytoremediation of manganese (Mn)-contaminated soil.MethodsConsidering that Mn stress typically exerts a binary effect on plants, to reveal the dynamic characteristics of the physiological indexes of B. papyrifera to Mn stress, we conducted pot experiments with six different Mn concentrations (0, 0.25, 0.5, 1, 2, and 5 mmol/L) for 60 days. In addition to the chlorophyll content, malondialdehyde (MDA), proline (PRO), soluble sugar, superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), the absorption and transfer characteristics of Mn, and root structure were also measured.ResultsPhytoremedial potential parameters such as the bioconcentration factor (BCF) and translocation factor (TF) displayed an increasing trend with the increase of Mn concentration. At lower Mn concentrations (<0.5 mmol/L), the TF value was <1 but crossed 1 when the Mn concentration exceeded 100 mmol/L. The Mn distribution in various tissues was in the following order: leaf > stem > root. The root structure analysis revealed that low-level concentrations of Mn (1 mmol/L) promoted root development. Mn concentration and stress duration had significant effects on all measured physiological indexes, and except soluble sugar, Mn concentration and stress time displayed a significant interaction on the physiological indexes.DiscussionOur study demonstrates that the physiological indexes of B. papyrifera display dynamic characteristics under Mn stress. Thus, during the monitoring process of Mn stress, it appears to be necessary to appropriately select sampling parts according to Mn concentration.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physiological dynamics as indicators of plant response to manganese binary effect

Zheng

et al. 2023

Front. Plant Sci.

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“…Heavy metals are pollutants that are highly toxic even at low concentrations, making them a public health concern [ 127 , 128 , 129 ]. Heavy metal monitoring using MFCs has increased in recent years due to the complicated and time-consuming process of traditional monitoring systems [ 130 ].…”

Section: Sensor Development Using Mets and Hydrogelmentioning

confidence: 99%

Recent Implementations of Hydrogel-Based Microbial Electrochemical Technologies (METs) in Sensing Applications

Wang

Shi

et al. 2023

Sensors

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Hydrogel materials have been used extensively in microbial electrochemical technology (MET) and sensor development due to their high biocompatibility and low toxicity. With an increasing demand for sensors across different sectors, it is crucial to understand the current state within the sectors of hydrogel METs and sensors. Surprisingly, a systematic review examining the application of hydrogel-based METs to sensor technologies has not yet been conducted. This review aimed to identify the current research progress surrounding the incorporation of hydrogels within METs and sensors development, with a specific focus on microbial fuel cells (MFCs) and microbial electrolysis cells (MECs). The manufacturing process/cost, operational performance, analysis accuracy and stability of typical hydrogel materials in METs and sensors were summarised and analysed. The current challenges facing the technology as well as potential direction for future research were also discussed. This review will substantially promote the understanding of hydrogel materials used in METs and benefit the development of electrochemical biosensors using hydrogel-based METs.

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“…1 In recent decades, some agricultural soils in China have experienced an extremely rapid increase in Cd content due to various human activities. 2 Rice, a staple food for half of the human population, provides a dominant source of Cd exposure, especially in Asian countries. 3 For example, rice contributes to around 56% of the total dietary exposure of Cd for general populations in China, and it rises to 65% in the southern part due to higher rice consumption.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Sources of Cadmium in Rice Plants under Pot and Field Conditions from Its Isotopic Fractionation

Dong,

Xiao,

Cheng

et al. 2024

ACS Environ. Au

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The highly excessive uptake of cadmium (Cd) by rice plants is well known, but the transfer pathway and mechanism of Cd in the paddy system remain poorly understood. Herein, pot experiments and field investigation were systematically carried out for the first time to assess the phytoavailability of Cd and fingerprint its transfer pathway in the paddy system under different treatments (slaked lime and biochar amendments), with the aid of a pioneering Cd isotopic technique. Results unveiled that no obvious differences were displayed in the δ 114/110 Cd of Ca(NO 3 ) 2 -extractable and acid-soluble fractions among different treatments in pot experiments, while the δ 114/110 Cd of the water-soluble fraction varied considerably from −0.88 to −0.27%, similar to those observed in whole rice plant [Δ 114/110 Cd plant−water ≈ 0 (−0.06 to −0.03%)]. It indicates that the water-soluble fraction is likely the main source of phytoavailable Cd, which further contributes to its bioaccumulation in paddy systems. However, Δ 114/110 Cd plant−water found in field conditions (−0.39 ± 0.05%) was quite different from those observed in pot experiments, mostly owing to additional contribution derived from atmospheric deposition. All these findings demonstrate that the precise Cd isotopic compositions can provide robust and reliable evidence to reveal different transfer pathways of Cd and its phytoavailability in paddy systems.

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Heavy metals in agricultural soil in China: A systematic review and meta-analysis

Cited by 49 publications

References 46 publications

Physiological dynamics as indicators of plant response to manganese binary effect

Physiological dynamics as indicators of plant response to manganese binary effect

Recent Implementations of Hydrogel-Based Microbial Electrochemical Technologies (METs) in Sensing Applications

Revealing the Sources of Cadmium in Rice Plants under Pot and Field Conditions from Its Isotopic Fractionation

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