Cadmium uptake from soil and transport by leafy vegetables: A meta-analysis

Huang, Linjuan; Wang, Qiong; Zhou, Qiyao; Ma, Luyao; Wu, Yingjie; Liu, Qizhen; Wang, Sheng; Feng, Ying

doi:10.1016/j.envpol.2020.114677

Cited by 102 publications

(28 citation statements)

References 56 publications

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“…With the rapid growth of the global population and economy, in addition to gradual improvements in the quality of life, the demand for healthy food has increased continuously in recent years [1]. Although consumers prefer to purchase aesthetically-pleasing fruits and vegetables, the majority of these products have been grown using pesticides or preservatives that can remain in the soil, damage soil quality [2], and leave residues on the crops thereby resulting in bioaccumulation and a potential threat to human health. Furthermore, inefficient fruit and vegetable cleaners used to address this problem often cause secondary pollution [3].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) from Aqueous Solution by Mussel Shell-Based Adsorbent: Preparation, Characterization, and Adsorption Performance

et al. 2021

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As a natural biological adsorbent, shell powder is inexpensive, highly efficient, and does not leave any chemical residue; thus, it can be used to remove contaminants from water. In this study, we used mussel shells as a raw material to prepare an adsorbent. Scanning electron microscopy was used to observe the surface morphology of the mussel shell powder before and after calcination, and X-ray diffraction measurements, Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller measurements were performed to analyze the structure and composition of calcined mussel shell powder. Characterization of the shell powder before and after calcination revealed a change from calcium carbonate to calcium oxide, as well as the formation of a surface porous structure. Using Pb(II) as a representative contaminant, various factors affecting the adsorption were explored, and the adsorption mechanism was analyzed. It was found that the adsorption is consistent with the Freundlich adsorption isotherm and the pseudo second-order model. The calcined mussel shell powder exhibits excellent adsorption for Pb(II), with an adsorption capacity reaching 102.04 mg/g.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) from Aqueous Solution by Mussel Shell-Based Adsorbent: Preparation, Characterization, and Adsorption Performance

et al. 2021

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“…CEC was one of the main soil properties controlling Cd retention behavior and negatively correlated with extractable Cd in soil [51]. From Figure 6C, we can see that the CEC value of the soil was very high, around 360-377 cmol/kg, and the values increased as the reaction progressed.…”

Section: Changes In Soil Propertiesmentioning

confidence: 93%

“…The high content of OM (50-70 g/kg) in the soil may explain the observed negligibl effect of nZVI and CA on soil microbial properties [50]. CEC was one of the main soil properties controlling Cd retention behavior and neg atively correlated with extractable Cd in soil [51]. From Figure 6C, we can see that the CE The critical pH value for Cd 2+ hydrolysis (formation of Cd(OH) + and Cd 2 (OH) 3+ ) and precipitation (Cd(OH) 2 ) is ≥8.0 [47].…”

Section: Changes In Soil Propertiesmentioning

confidence: 98%

Remediation of Cd-Contaminated Soil by Modified Nanoscale Zero-Valent Iron: Role of Plant Root Exudates and Inner Mechanisms

Huang

Yang

Deng

et al. 2021

IJERPH

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In this study, the role of exogenous root exudates and microorganisms was investigated in the application of modified nanoscale zero-valent iron (nZVI) for the remediation of cadmium (Cd)-contaminated soil. In this experiment, citric acid (CA) was used to simulate root exudates, which were then added to water and soil to simulate the pore water and rhizosphere environment. In detail, the experiment in water demonstrated that low concentration of CA facilitated Cd removal by nZVI, while the high concentration achieved the opposite. Among them, CA can promote the adsorption of Cd not only by direct complexation with heavy metal ions, but also by indirect effect to promote the production of iron hydroxyl oxides which has excellent heavy metal adsorption properties. Additionally, the H+ dissociated from CA posed a great influence on Cd removal. The situation in soil was similar to that in water, where low concentrations of CA contributed to the immobilization of Cd by nZVI, while high concentrations promoted the desorption of Cd and the generation of CA–Cd complexes which facilitated the uptake of Cd by plants. As the reaction progressed, the soil pH and cation exchange capacity (CEC) increased, while organic matter (OM) decreased. Meanwhile, the soil microbial community structure and diversity were investigated by high-throughput sequencing after incubation with CA and nZVI. It was found that a high concentration of CA was not conducive to the growth of microorganisms, while CMC had the effect of alleviating the biological toxicity of nZVI.

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“…With the rapid development of cities, atmospheric deposition, mining and smelting activities, wastewater irrigation, sewage irrigation, fertilizer and pesticide application have led to heavy metal pollution in the soil environment and agriculture (Elgallal et al, 2016;Rai et al, 2019;Ma et al, 2020). Cadmium (Cd) is classi ed as a Group 1 human carcinogen (Cancer IAFO, 2018) and is considered an important pollutant with great concern in agricultural ecosystems due to its high toxicity and bioavailability (Huang et al, 2020;Ma et al, 2021). Plants grown in Cd-contaminated soil readily accumulated Cd in their edible parts, and continuous dietary intake of Cd could result into serious health problems such as prostate, lung cancers and bone disorders (Zhang et al, 2014;Tang et al, 2019a;Yang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Celery is rich in vitamins, protein, cellulose and other nutrients (Li et al, 2017). Based on the results of meta-analysis, it was found that celery is not sensitive to cadmium pollution in soil, and can be used as a candidate leaf vegetable for safe production in moderately and slightly polluted vegetable elds (Huang et al, 2020). However, a few reports showed that celery was vulnerable to soil Cd contamination (Ni et al, 2002;Wang et al, 2013;Fang et al, 2019), and long-term ingestion of celery grown in Cd-contaminated eld would pose an adverse effect on human health .…”

Section: Introductionmentioning

confidence: 99%

Genotypic differences of Cd concentration and nutrition traits of 23 main celery cultivars of China in a Cd contaminated greenhouse

Zhou

Wang

Huang

et al. 2021

Preprint

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Due to the increasing concerns of heavy metal contamination in greenhouse field, safety production of vegetables especially leafy vegetables was largely limited. In this study, the cadmium (Cd) concentration and major nutrition qualities of 23 main celery cultivars of China were compared in a greenhouse experiment. Great genotypic differences in biomass, cadmium accumulation and nutrition traits were observed. The biomass of cultivars HQ, JZ, JH and SQ were significantly higher than those of the others. And Cd concentration in edible part ranged from 0.53 to 2.56 mg·kg− 1 DW, of which SQ exhibited the lowest Cd concentration. In addition, SQ has the lowest Cd transport factor (TF) and bio-concentration factor (BCF), followed by another genotype LF. Simultaneously, they have relatively higher chlorophyll content and vitamin C concentration, lower cellulose content. Therefore, the two genotypes SQ and LF were selected as promising candidates to grow on a mid Cd-contaminated greenhouse field to achieve safety production. Further correlation analysis showed that Cd concentration in edible part is positively correlated with cellulose content, but negatively correlated with vitamin C concentration. The results of celery variety screening provide a safe production strategy of moderately polluted greenhouse vegetable fields.

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Cadmium uptake from soil and transport by leafy vegetables: A meta-analysis

Cited by 102 publications

References 56 publications

Adsorption of Pb(II) from Aqueous Solution by Mussel Shell-Based Adsorbent: Preparation, Characterization, and Adsorption Performance

Adsorption of Pb(II) from Aqueous Solution by Mussel Shell-Based Adsorbent: Preparation, Characterization, and Adsorption Performance

Remediation of Cd-Contaminated Soil by Modified Nanoscale Zero-Valent Iron: Role of Plant Root Exudates and Inner Mechanisms

Genotypic differences of Cd concentration and nutrition traits of 23 main celery cultivars of China in a Cd contaminated greenhouse

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