A route to robust thioether-functionalized MOF solid materials displaying heavy metal uptake and the ability to be further oxidized

2017 ◽  
Vol 46 (36) ◽  
pp. 12036-12040 ◽  
Author(s):  
Guo-Wei Xiao ◽  
Teng-Fei Chen ◽  
Xin-Zhan Sun ◽  
Hui Guo ◽  
Zhong-Feng Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ligand Exchange ◽  
Metal Uptake ◽  
Alternative Strategy ◽  
Heavy Metal Uptake ◽  
Solid Materials ◽  
Exchange Method

A facile and mild solvent-assisted ligand exchange method was developed as an alternative strategy to achieve thioether-based MOFs, and their oxidized forms, that were able to take up heavy metals from solutions and capture CO2.

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

1996 ◽  
Vol 34 (5-6) ◽  
pp. 267-272 ◽  
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.

scholarly journals Kestabilan Inokulan Azotobacter selama Penyimpanan pada Dua Suhu

2012 ◽  
Vol 14 (1) ◽  
pp. 52
Author(s):  
Reginawanti Hindersah ◽  
Rija Sudirja
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Root Growth ◽  
Contaminated Soil ◽  
Metal Uptake ◽  
Room Temperature ◽  
Heavy Metal Uptake ◽  
Total N ◽  
The Stability ◽  
Temperature Storage

Azotobacter might be used as biological agents in bioremediation of heavy metal-contaminated soil since this rhizobacteria produceexopolysachharides (EPS) that mobilize soil heavy metals, and phytohormones that regulate root growth. So that heavy metal uptake bythe roots could be increased. The objective of this research was to verify the stability of EPS and phytohormones in Azotobacter liquidinoculants during four months in different temperature storage. Liquid inoculants has been produced in EPS-induced media and stored in200C and room temperature (24-270C) during four months. The results showed that the better temperature storage was room temperatureinstead of 20 0C since pH, total N, and EPS and phytohormones content was relatively stable during storage.

scholarly journals Evaluation of Phytoremediation Potential of Castor Cultivars for Heavy Metals from Soil

2019 ◽  
Vol 37 ◽  
Author(s):  
M.J. KHAN ◽  
N. AHMED ◽  
W. HASSAN ◽  
T. SABA ◽  
S. KHAN ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Uptake ◽  
Plant Biomass ◽  
Ricinus Communis ◽  
Contaminated Sites ◽  
Heavy Metal Uptake ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT: Phytoremediation is a useful tool to restore heavy metals contaminated soils. This study was carried out to test two castor (Ricinus communis) cultivars [Local and DS-30] for phytoextraction of heavy metals from the soil spiked by known concentrations of seven metals (Cu, Cr, Fe, Mn, Ni, Pb and Zn). A pot experiment was laid out by using a completely randomized design. Soil and plant samples were analyzed at 100 days after planting. The data on heavy metal uptake by plant tissues (roots, leaves and shoots) of the two castor cultivars suggested that a considerable amount of metals (Fe = 27.18 mg L-1; Cu = 5.06 mg L-1; Cr = 2.95 mg L-1; Mn = 0.22 mg L-1; Ni = 4.66 mg L-1; Pb = 3.33 mg L-1; Zn = 15.04 mg L-1) was accumulated in the plant biomass. The soil heavy metal content at the end of experiment significantly decreased with both cultivars, resulting in improved soil quality. Therefore, it is concluded that both castor cultivars, Local and DS-30, can be used for phytoremediation of heavy metal-contaminated sites.

scholarly journals Silicon Mechanisms to Ameliorate Heavy Metal Stress in Plants

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
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.

scholarly journals Amelioration of Heavy Metals from Contaminated Soils of Hazaribagh and Tejgaon Areas from Bangladesh Using Red Mud

1970 ◽  
Vol 44 (4) ◽  
pp. 479-484 ◽  
Author(s):  
AS Chamon ◽  
MN Mondol ◽  
SM Ullah
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Red Mud ◽  
Contaminated Soils ◽  
Metal Uptake ◽  
Tomato Fruit ◽  
Wheat Variety ◽  
Dry Weight ◽  
Wheat Grain ◽  
Heavy Metal Uptake

Pot experiments with soil from two heavy metals contaminated sites were conducted. The objective of the experiment was to test red mud as an inorganic soil amendment to reduce heavy metal uptake and to alleviate toxicity in tomato (variety- Ratan) and wheat (variety- Agrani) crops. Iron (Fe) oxides contained in red mud, a byproduct of the aluminum industry, reduced soil to plant transfer of zinc (Zn), nickel (Ni), cadmium (Cd), and chromium (Cr). In Hazaribagh soil, tomato fruit yield (dry weight) increased by 72%. Shoot length and biomass production were positively influenced by red mud containing high amounts of Fe2O3. Heavy metal uptake into tomato plants was significantly ameliorated in both soil. On Tejgaon soil the effect of red mud on wheat grain yield production was not significantly different but the ameliorative effect of red mud application was clearly observed in the wheat grain samples for Tejgaon soil. Key words: Red Mud; Wheat; Tomato; Remediation; Heavy metals DOI: 10.3329/bjsir.v44i4.4602 Bangladesh J. Sci. Ind. Res. 44(4), 479-484, 2009

scholarly journals Heavy Metal Uptake of Lettuce and Ryegrass from Urban Waste Composts

2020 ◽  
Vol 17 (8) ◽  
pp. 2887
Author(s):  
Remigio Paradelo ◽  
Antía Villada ◽  
María Teresa Barral
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Urban Agriculture ◽  
Metal Uptake ◽  
Element Concentration ◽  
Animal Feed ◽  
Italian Ryegrass ◽  
Heavy Metal Uptake ◽  
Urban Waste ◽  
Feed Production

Interest in using urban waste composts as amendments in urban agriculture is growing nowadays. However, concerns about the potential transference of pollutants present in urban waste to the food chain are very relevant when they are recycled for food or animal feed production. Thus, for the safe use of urban waste composts, it has to be assured that no risk of metal transference to plants from compost exists. In this work, the transference of heavy metals from urban waste composts to plants has been studied in an experiment with lettuce and Italian ryegrass, grown in substrates based on five metal-rich composts and a manure vermicompost (included for comparison). A two-month pot experiment was performed under controlled light and temperature conditions, and plant growth and uptake of Cu, Pb, Cd and Zn were analyzed. For both species, the concentration of metals in plant tissue followed the sequence Zn > Cu >> Pb ≈ Cd, the same as the metal concentrations in four out of the five composts. Plant concentrations of Zn, Cu and Cd increased with their concentrations in compost, whereas this relation was not observed for Pb. The ratio between element concentration in plant and compost were much higher for Zn, Cd and Cu than for Pb, showing the lower bioavailability of Pb with respect to other metals.

scholarly journals Decoding Heavy Metal Stress Signalling in Plants: Towards Improved Food Security and Safety

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1781
Author(s):  
Marshall Keyster ◽  
Lee-Ann Niekerk ◽  
Gerhard Basson ◽  
Mogamat Carelse ◽  
Olalekan Bakare ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Food Security ◽  
Food Safety ◽  
Metal Uptake ◽  
Heavy Metal Stress ◽  
Cellular Damage ◽  
Heavy Metal Uptake ◽  
Toxic Heavy Metal ◽  
The Impact

The mining of heavy metals from the environment leads to an increase in soil pollution, leading to the uptake of heavy metals into plant tissue. The build-up of toxic metals in plant cells often leads to cellular damage and senescence. Therefore, it is of utmost importance to produce plants with improved tolerance to heavy metals for food security, as well as to limit heavy metal uptake for improved food safety purposes. To achieve this goal, our understanding of the signaling mechanisms which regulate toxic heavy metal uptake and tolerance in plants requires extensive improvement. In this review, we summarize recent literature and data on heavy metal toxicity (oral reference doses) and the impact of the metals on food safety and food security. Furthermore, we discuss some of the key events (reception, transduction, and response) in the heavy metal signaling cascades in the cell wall, plasma membrane, and cytoplasm. Our future perspectives provide an outlook of the exciting advances that will shape the plant heavy metal signaling field in the near future.

The Effect of Transpiration for Heavy Metal Uptake of Hyperaccumulators

2012 ◽  
Vol 178-181 ◽  
pp. 901-904 ◽  
Author(s):  
Han Zhou Hao ◽  
Ru Gang Zhong ◽  
Rong Xiao ◽  
Cheng Wu Liu ◽  
Xue Bin Zhong
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Uptake ◽  
Heavy Metal Uptake ◽  
Plant Transpiration ◽  
Metal Absorption ◽  
Solid Foundation

Transpiration of plants has an important role in heavy metal absorption. When the transpiration is flourishing, plants accumulate more heavy metals, and its enrichment capability is also stronger.This article reviews the effect of the plant transpiration on hyperaccumulators of heavy metal uptake to lay a solid foundation for further research.

scholarly journals Low-cost agricultural measures to reduce heavy metal transfer into the food chain – a review

2011 ◽  
Vol 51 (No. 1) ◽  
pp. 1-11 ◽  
Author(s):  
M. Puschenreiter ◽  
O. Horak ◽  
W. Friesl ◽  
W. Hartl
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Food Chain ◽  
Metal Uptake ◽  
Farmyard Manure ◽  
Metal Transfer ◽  
Heavy Metal Uptake ◽  
Transfer Factors ◽  
Effective Measure ◽  
Edible Parts

Heavy metal contamination affects large areas of Europe and worldwide. Hot spots of pollution are located close to industrial sites, around large cities and in the vicinity of mining and smelting plants. Agriculture in these areas faces major problems due to heavy metal transfer into crops and subsequently into the food chain. This paper gives an overview on simple but effective countermeasures to reduce the transfer of heavy metals to edible parts of crops. Since crop species and varieties largely differ in their heavy metal uptake, choosing plants with low transfer factors (e.g., legumes, cereals) may reduce metal concentration in edible parts significantly. Cultivating crops with higher heavy metal uptake capacity, e.g., spinach or lettuce should be avoided. The application of soil amendments is another very effective measure to reduce the concentration of heavy metals in crops. Both organic (e.g., farmyard manure) and inorganic amendments (e.g., lime, zeolites, and iron oxides) were found to decrease the metal accumulation. Further effective methods to reduce metal transfer into food chain include crop rotation and cultivation of industrial or bio-energy crops. It is concluded that the methods presented here comprise several tools, which are easy to apply, and are effective to allow safe agriculture on moderately contaminated soils.

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