Using soil heavy metal enrichment and mobility factors to determine potential uptake by vegetables

This study investigated copper (Cu) and lead (Pb) enrichment factor (EF) and mobility factor (MF) as possible indicators of their uptake by spinach (Spinaceae oleraceae) and carrots (Daucus carota) grown on a sludge-amended luvisol (SAL). Sewage sludge was applied to luvisol at different rates and spinach and carrots planted. Enrichment of Cu and Pb in SAL was determined, and values regressed with those of Cu and Pb concentrations in spinach and carrots. Concentration of Cu and Pb in vegetables was calculated using the regression model obtained, and calculated values compared with actual values. Pb MF were higher than Cu MF but Cu and Pb EFsoil values were < 3.0, indicating minor enrichment from sludge addition. EF had 10% reliability in predicting Cu and Pb uptake in vegetables. MF was more than 70% reliable in predicting carrot Cu uptake and spinach Pb uptake. EF and MF are not effective as predictors of heavy metal uptake by vegetables. The role of other soil components including root exudates and by-products from microbial activities should also be investigated.

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Silicon Mechanisms to Ameliorate Heavy Metal Stress in Plants

BioMed Research International ◽

10.1155/2018/8492898 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 16

Author(s):

Abolghassem Emamverdian ◽

Yulong Ding ◽

Yinfeng Xie ◽

Sirous Sangari

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Enzyme Activity ◽

Metal Uptake ◽

Ph Value ◽

Anthropogenic Activities ◽

Heavy Metal Stress ◽

Heavy Metal Uptake ◽

Stimulation Of

The increased contaminants caused by anthropogenic activities in the environment and the importance of finding pathways to reduce pollution caused the silicon application to be considered an important detoxification agent. Silicon, as a beneficial element, plays an important role in amelioration of abiotic stress, such as an extreme dose of heavy metal in plants. There are several mechanisms involved in silicon mediation in plants, including the reduction of heavy metal uptake by plants, changing pH value, formation of Si heavy metals, and stimulation of enzyme activity, which can work by chemical and physical pathways. The aim of this paper is to investigate the major silicon-related mechanisms that reduce the toxicity of heavy metals in plants and then to assess the role of silicon in increasing the antioxidant enzyme and nonenzyme activities to protect the plant cell.

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Role of Rhizospheric Microbes in Heavy Metal Uptake by Plants

Agro-Environmental Sustainability ◽

10.1007/978-3-319-49727-3_8 ◽

2017 ◽

pp. 147-163 ◽

Cited By ~ 8

Author(s):

Mihiri Seneviratne ◽

Gamini Seneviratne ◽

HMSP Madawala ◽

Meththika Vithanage

Keyword(s):

Heavy Metal ◽

Metal Uptake ◽

Heavy Metal Uptake ◽

Rhizospheric Microbes

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A preliminary study of the role of bacterial–fungal co-inoculation on heavy metal phytotoxicity in serpentine soil

Australian Journal of Botany ◽

10.1071/bt14270 ◽

2015 ◽

Vol 63 (4) ◽

pp. 261 ◽

Cited By ~ 12

Author(s):

Mihiri Seneviratne ◽

Gamini Seneviratne ◽

H. M. S. P. Madawala ◽

M. C. M. Iqbal ◽

Nishanta Rajakaruna ◽

...

Keyword(s):

Heavy Metal ◽

Dehydrogenase Activity ◽

Soil Quality ◽

Combination Treatment ◽

Metal Uptake ◽

Serpentine Soil ◽

Heavy Metal Uptake ◽

Microbial Inoculation ◽

Fungal Inoculation

This study was conducted to understand the role of bacterial–fungal interactions on heavy metal uptake by Zea mays plants. A pot experiment was conducted for 90 days with Z. mays in serpentine soil inoculated with a Gram-negative bacterium, fungus (Aspergilllus sp.) and both microbes to determine the effects of inoculation on nickel, manganese, chromium and cobalt concentrations in plant tissue and soil. Soil nutrients and soil enzyme activities were measured to determine the effect of inoculations on soil quality. Inoculation of microorganisms increased shoot and root biomass, and the maximum biomass was in the bacterial–fungal inoculation. This could be due to the solubilisation of phosphate and production of indole acetic acid. Although the combination treatment contributed to an increase in heavy metal uptake in Z. mays plants, the lowest translocation was observed in the combination treatment. Moreover, the soil available nitrogen, available phosphorous and total organic carbon content were increased with the microbial inoculation. Similarly, the soil dehydrogenase activity was higher as a result of microbial inoculation, whereas the highest dehydrogenase activity was reported in the combination inoculation. This study confirms the synergistic effect of bacterial–fungal inoculation as a soil-quality enhancer and as a plant-growth promoter in the presence of heavy metals.

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Role of phosphate fertilizers in heavy metal uptake and detoxification of toxic metals

Chemosphere ◽

10.1016/j.chemosphere.2014.01.030 ◽

2014 ◽

Vol 108 ◽

pp. 134-144 ◽

Cited By ~ 116

Author(s):

D.K. Gupta ◽

S. Chatterjee ◽

S. Datta ◽

V. Veer ◽

C. Walther

Keyword(s):

Heavy Metal ◽

Toxic Metals ◽

Metal Uptake ◽

Heavy Metal Uptake ◽

Phosphate Fertilizers

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The role of sulfate as a competitive inhibitor of enzymatically-mediated heavy metal uptake byCitrobacter sp: implications in the bioremediation of acid mine drainage water using biogenic phosphate precipitant

Journal of Chemical Technology & Biotechnology ◽

10.1002/(sici)1097-4660(199912)74:12<1149::aid-jctb164>3.0.co;2-0 ◽

1999 ◽

Vol 74 (12) ◽

pp. 1149-1156 ◽

Cited By ~ 7

Author(s):

Ping Yong ◽

Lynne E Macaskie

Keyword(s):

Heavy Metal ◽

Acid Mine Drainage ◽

Metal Uptake ◽

Mine Drainage ◽

Competitive Inhibitor ◽

Drainage Water ◽

Heavy Metal Uptake ◽

Acid Mine

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Enhanced heavy metal uptake by activated sludge cultures grown in the presence of biopolymer stimulators

Water Science & Technology ◽

10.2166/wst.1996.0559 ◽

1996 ◽

Vol 34 (5-6) ◽

pp. 267-272 ◽

Cited By ~ 10

Author(s):

Ken Fukushi ◽

Duk Chang ◽

Sam Ghosh

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Activated Sludge ◽

G Protein ◽

Metal Uptake ◽

Heavy Metal Uptake ◽

Culture Viability ◽

Grown Culture

The objective of this research was to investigate the feasibility of developing improved activated sludge cultures capable of removing heavy metals. Cystine, peptone, and β-glycerophosphate (BGP) stimulated metal uptake without the significant reduction of culture viability otherwise experienced in the absence of these chemicals. The cystine-peptone-BGP-grown culture exhibited the highest removal of copper and cadmium of 5.67 and 2.53 mM/g protein, respectively.

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