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Phytoremediation of heavy metal

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https://www.readbyqxmd.com/read/28532161/modelling-of-phytoextraction-efficiency-of-microbially-stimulated-salix-dasyclados-l-in-the-soils-with-different-speciation-of-heavy-metals
#1
Michał Złoch, Tomasz Kowalkowski, Jarosław Tyburski, Katarzyna Hrynkiewicz
Bioaugmentation of soils with selected microorganisms during phytoextraction can be the key solution, but the actual efficacy of this technology should be confirmed for different physicochemical soil parameters and heavy metal availability to guarantee the universality of this method. Equally important is development of the accurate prediction tool to manage phytoremediation process.The main objective of this study was to evaluate the role of three metalotolerant siderophore-producing Streptomyces sp. B1-B3 strains in the phytoremediation of heavy metals with the use of S...
May 22, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28532158/particulate-matter-heavy-metals-and-polycyclic-aromatic-hydrocarbons-accumulation-on-the-leaves-of-tilia-cordata-mill-in-five-polish-cities-with-different-level-of-air-pollution
#2
Robert Popek, Adrian Łukowski, Christopher Bates, Jacek Oleksyn
Urbanized areas are struggling with the problem of air pollution and when the number of people living in cities increasing, the situation is likely to deteriorate. One of the most harmful pollutants is particulate matter (PM). Increased levels of PM in the atmosphere are likely to have a negative impact on human health. Phytoremediation technology could be a solution. It involves plants acting as bio-filters by accumulating particles on, and in the leaves, which removes the particles from the atmosphere.This study looks at the accumulation of PM including heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs), on the foliage of small-leaved lime (Tilia cordata Mill...
May 22, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28531837/possible-developments-for-ex-situ-phytoremediation-of-contaminated-sediments-in-tropical-and-subtropical-regions-review
#3
REVIEW
Marco Pittarello, Jader Galba Busato, Paolo Carletti, Leonardo Barros Dobbss
The growing problem of remediation of contaminated sediments dredged from harbor channels needs to be resolved by a cost effective and sustainable technology. Phytoremediation, by ex situ remediation plants, seems to have the potential to replace traditional methods in case of moderately contaminated sediments. On the other side, the need to mix sediments with soil and/or sand to allow an easier establishment of most employed species causes an increase of the volume of the processed substrate up to 30%. Moreover the majority of phytoremediating species are natives of temperate climate belt...
April 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/28531658/co-plantation-of-aquatic-macrophytes-typha-angustifolia-and-paspalum-scrobiculatum-for-effective-treatment-of-textile-industry-effluent
#4
Vishal V Chandanshive, Niraj R Rane, Asif S Tamboli, Avinash R Gholave, Rahul V Khandare, Sanjay P Govindwar
Field treatment of textile industry effluent was carried out in constructed drenches (91.4m×1.2m×0.6m; 65.8m(3)) planted independently with Typha angustifolia, Paspalum scrobiculatum and their co-plantation (consortium-TP). The in situ treatment of effluent by T. angustifolia, P. scrobiculatum and consortium-TP was found to decrease ADMI color value by 62, 59 and 76%, COD by 65, 63 and 70%, BOD by 68, 63 and 75%, TDS by 45, 39 and 57%, and TSS by 35, 31 and 47%, respectively within 96h. Heavy metals such as arsenic, cadmium, chromium and lead were also removed up to 28-77% after phytoremediation...
May 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28523616/the-effect-of-multiple-contamination-of-soil-on-lmw-and-mmw-pahs-accumulation-in-the-roots-of-rubus-fruticosus-l-naturally-growing-near-the-copper-mining-and-smelting-complex-bor-east-serbia
#5
Slađana Č Alagić, Vesna P Stankov Jovanović, Violeta D Mitić, Jelena S Nikolić, Goran M Petrović, Snežana B Tošić, Gordana S Stojanović
Samples of roots and spatial soils of native Rubus fruticosus L. were collected from the spots positioned at different distances from the copper smelter and city heating plants in the industrial zone of the town of Bor (Serbia) and subjected to chemical analyses in order to determine the content of several heavy metals, and 15 priority polycyclic aromatic hydrocarbons (PAHs). In this study, the results for 9 low and medium molecular weight PAHs (LMW and MMW PAHs) are represented and processed using the calculation of bio-concentration factors and statistical methods such as hierarchical cluster analysis and Pearson's correlation study with the aim of investigating the plant capabilities for their uptake from the soil and later accumulation into the root tissue, under the hostile circumstances of multiple contamination...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28509939/bioremoval-of-lead-using-pennisetum-purpureum-augmented-with-enterobacter-cloacae-vitpasj1-a-pot-culture-approach
#6
Anamika Das, Priyanka Belgaonkar, Aditya S Raman, Sofia Banu, Jabez W Osborne
Lead is a toxic heavy metal discharged into the ecosystem from various industries. Biological remediation strategies have been effective in the bioremoval of lead. In our current study, a phytobacterial system using Pennisetum purpureum along with lead-resistant bacterium (LRB) was employed for the uptake of lead. The LRB was obtained from lead-contaminated sites. The isolate VITPASJ1 was found to be highly tolerant to lead and was identified as an effective plant growth-promoting bacterium. The 16S rRNA sequencing revealed VITPASJ1 to be the closest neighbour of Enterobacter cloacae...
May 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28501336/bioethanol-production-from-recovered-napier-grass-with-heavy-metals
#7
Chun-Han Ko, Fan-Chun Yu, Fang-Chih Chang, Bing-Yuan Yang, Wen-Hua Chen, Wen-Song Hwang, Ta-Chih Tu
Using plants to absorb and accumulate heavy metals from polluted soil, followed by the recycling of explants containing heavy metals, can help achieve the goal of reverting contaminated soil to low heavy-metal content soil. However, the re-use of recovered explants can also be problematic. Meanwhile, bioethanol has become a popular energy source. In this study, napier grass was used for the remediation of soil contaminated with heavy metals (artificially contaminated soil). The influence of bioethanol production from napier grass after phytoremediation was also investigated...
May 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28482187/heavy-metal-uptake-by-plant-parts-of-willow-species-a-meta-analysis
#8
Dávid Tőzsér, Tibor Magura, Edina Simon
Previous studies on phytoremediation reported contradictory or inconsistent results on the Cd, Pb, and Zn accumulation in and among plant parts of willow (Salix) species. We hypothesized that metals could accumulate in all plant organs in different concentrations and the metal accumulation in tissues would be increased with exposure time. Furthermore, we analysed the effect of soil pH on metal accumulation, and the correlation between metals. We evaluated published information on Cd, Pb, and Zn accumulation in root, stem, twig, and leaf of willow species using meta-analysis...
April 27, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28456029/advances-in-microbe-assisted-reclamation-of-heavy-metal-contaminated-soils-over-the-last-decade-a-review
#9
REVIEW
Muhammad Arslan Ashraf, Iqbal Hussain, Rizwan Rasheed, Muhammad Iqbal, Muhammad Riaz, Muhammad Saleem Arif
Contamination of agricultural soils with trace metals present lethal consequences in terms of diverse ecological and environmental problems that entail entry of metal in food chain, soil deterioration, plant growth suppression, yield reduction and alteration in microbial community. Metal polluted soils have become a major concern for scientists around the globe. Phytoremediation involves the hyperaccumulation of metals in different plant parts. Phytoremediation of metals from polluted soils could be enhanced through inoculation with metal resistant plant growth promoting (PGP) bacteria...
April 26, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28455771/cadmium-and-zinc-activate-adaptive-mechanisms-in-nicotiana-tabacum-similar-to-those-observed-in-metal-tolerant-plants
#10
Rosario Vera-Estrella, María F Gómez-Méndez, Julio C Amezcua-Romero, Bronwyn J Barkla, Paul Rosas-Santiago, Omar Pantoja
Tobacco germinated and grew in the presence of high concentrations of cadmium and zinc without toxic symptoms. Evidence suggests that these ions are sequestered into the vacuole by heavy metal/H (+) exchanger mechanisms. Heavy metal hyperaccumulation and hypertolerance are traits shared by a small set of plants which show specialized physiological and molecular adaptations allowing them to accumulate and sequester toxic metal ions. Nicotiana tabacum was used to test its potential as a metal-accumulator in a glass house experiment...
April 28, 2017: Planta
https://www.readbyqxmd.com/read/28441590/screening-arabidopsis-mutants-in-genes-useful-for-phytoremediation
#11
María Sanz-Fernández, María Rodríguez-Serrano, Ana Sevilla-Perea, Liliana Pena, M Dolores Mingorance, Luisa M Sandalio, María C Romero-Puertas
Emissions of heavy metals have risen over the past 200 years and significantly exceed those from natural sources. Phytoremediation strategies may be able to recover soil productivity in self-sustaining ecosystems; however, our knowledge of the molecular mechanisms involved in plant heavy-metal perception and signalling is scarce. The aim of this study was to assemble a "molecular tool box" of genes useful for phytoremediation. To identify mutants with different heavy-metal-tolerance, we first selected a medium from mixtures containing three metals based on their presence in two Spanish mining areas and then screened about 7000 lines of Arabidopsis T-DNA mutants and found 74 lines more resistant and 56 more susceptible than the wild type (WT)...
April 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28437478/metal-accumulation-by-sunflower-helianthus-annuus-l-and-the-efficacy-of-its-biomass-in-enzymatic-saccharification
#12
Saurabh Sudha Dhiman, Xin Zhao, Jinglin Li, Dongwook Kim, Vipin C Kalia, In-Won Kim, Jae Young Kim, Jung-Kul Lee
Accumulation of metal contaminants in soil as a result of various industrial and anthropogenic activities has reduced soil fertility significantly. Phytoextraction of metal contaminants can improve soil fertility and provide inexpensive feedstock for biorefineries. We investigated the hyperaccumulation capacity of sunflower (Helianthus annuus) biomass by cultivating these plants in various concentrations of metal contaminants. Sunflowers were grown in soils contaminated with various levels of heavy metals (10-2,000 mg/kg dry soil)...
2017: PloS One
https://www.readbyqxmd.com/read/28436673/unique-rhizosphere-microcharacteristics-facilitate-phytoextraction-of-multiple-metals-in-soil-by-the-hyperaccumulating-plant-sedum-alfredii
#13
Dandi Hou, Kai Wang, Ting Liu, Haixin Wang, Zhi Lin, Jie Qian, Lingli Lu, Shengke Tian
Understanding the strategies that the roots of hyperaccumulating plants use to extract heavy metals from soils is important for optimizing phytoremediation. The rhizosphere characteristics of Sedum alfredii, a hyperaccumulator, were investigated 6 months after it had been planted in weathered field soils contaminated with 5.8 μg of Cd g(-1), 1985.1 μg of Zn g(-1), 667.5 μg of Pb g(-1), and 698.8 μg of Cu g(-1). In contrast with the non-hyperaccumulating ecotype (NHE), the hyperaccumulating ecotype (HE) of S...
May 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28427272/biological-technologies-for-the-remediation-of-co-contaminated-soil
#14
Shujing Ye, Guangming Zeng, Haipeng Wu, Chang Zhang, Juan Dai, Jie Liang, Jiangfang Yu, Xiaoya Ren, Huan Yi, Min Cheng, Chen Zhang
Compound contamination in soil, caused by unreasonable waste disposal, has attracted increasing attention on a global scale, particularly since multiple heavy metals and/or organic pollutants are entering natural ecosystem through human activities, causing an enormous threat. The remediation of co-contaminated soil is more complicated and difficult than that of single contamination, due to the disparate remediation pathways utilized for different types of pollutants. Several modern remediation technologies have been developed for the treatment of co-contaminated soil...
April 21, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28413994/biological-methods-for-heavy-metal-decontamination-a-patent-review
#15
Vinay Sharma, Rupesh K Mishra
BACKGROUND: In the modern age of globalization and fast industrialization, the environmental matters are fetching more and more annoyance for human being. Heavy metals occur in immobilized form in sediments and as aggregates in nature. However due to the different human activities like ore mining and industrial processes, the natural biogeochemical cycles are disordered instigating amplified deposition of heavy metals in aquatic environments. The most common pollution causing heavy metals are considered to be the mercury, arsenic, lead, copper, silver, cadmium...
April 17, 2017: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/28397062/multi-metal-resistance-and-plant-growth-promotion-potential-of-a-wastewater-bacterium-pseudomonas-aeruginosa-and-its-synergistic-benefits
#16
Jayanta Kumar Biswas, Monojit Mondal, Jörg Rinklebe, Santosh Kumar Sarkar, Punarbasu Chaudhuri, Mahendra Rai, Sabry M Shaheen, Hocheol Song, Muhammad Rizwan
Water and soil pollution by toxic heavy metals (HMs) is increasing globally because of increase in population, industrialization and urbanization. It is a burning problem for the public, scientists, academicians and politicians how to tackle the toxic contaminants which jeopardize the environment. One possible solution for pollution abatement is a bioremediation-effective and innovative technology that uses biological systems for treatment of contaminants. Many bacteria synthesize indole-3-acetic acid (IAA) which is a product of L-tryptophan metabolism and belongs to the auxin class of plant growth-promoting hormone...
April 10, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28388670/transcriptomic-and-physiological-analyses-of-medicago-sativa-l-roots-in-response-to-lead-stress
#17
Bo Xu, Yingzhe Wang, Shichao Zhang, Qiang Guo, Yan Jin, Jingjing Chen, Yunhang Gao, Hongxia Ma
Lead (Pb) is one of the nonessential and toxic metals that threaten the environment and human health. Medicago sativa L. is a legume with high salt tolerance and high biomass production. It is not only a globally important forage crop but is also an ideal plant for phytoremediation. However, the biological and molecular mechanisms that respond to heavy metals are still not well defined in M. sativa. In this study, de novo and strand-specific RNA-sequencing was performed to identify genes involved in the Pb stress response in M...
2017: PloS One
https://www.readbyqxmd.com/read/28386947/the-potential-of-genetic-engineering-of-plants-for-the-remediation-of-soils-contaminated-with-heavy-metals
#18
REVIEW
Elisa Fasani, Anna Manara, Flavio Martini, Antonella Furini, Giovanni DalCorso
The genetic engineering of plants to facilitate the reclamation of soils and waters contaminated with inorganic pollutants is a relatively new and evolving field, benefiting from the heterologous expression of genes that increase the capacity of plants to mobilize, stabilize and/or accumulate metals. The efficiency of phytoremediation relies on the mechanisms underlying metal accumulation and tolerance, such as metal uptake, translocation and detoxification. The transfer of genes involved in any of these processes into fast-growing, high-biomass crops may improve their reclamation potential...
April 7, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28364646/the-influences-of-cr-tolerant-rhizobacteria-in-phytoremediation-and-attenuation-of-cr-vi-stress-in-agronomic-sunflower-helianthus-annuus-l
#19
Ali Bahadur, Rizwan Ahmad, Aftab Afzal, Huyuan Feng, Vishandas Suthar, Asfa Batool, Aman Khan, Muhammad Mahmood-Ul-Hassan
Chromium contamination of agronomic soil has to turn into a serious global problem. This research was pointed to assess the effects of three Cr-tolerant rhizobacteria (SS1, SS3, and SS6) on sunflower growth and heavy metal uptake under Cr smog i.e. 20, 30 and 40 ppm using K2Cr2O7. Root promotion assay and pot experiment were conducted to investigate and evaluate the effects of Cr tolerance rhizobacteria and Cr accumulation capacity of sunflower. From root promotion assay non-significant variation was observed in the root length between SS1 and SS3 compared with un-inoculated whereas SS6 enhanced the root length in the absence and presence of chromium...
July 2017: Chemosphere
https://www.readbyqxmd.com/read/28323451/phytostabilization-of-heavy-metals-by-the-emergent-macrophyte-vossia-cuspidata-roxb-griff-a-phytoremediation-approach
#20
Tarek M Galal, Fatma A Gharib, Safia M Ghazi, Khalid H Mansour
The present study was conducted to investigate the potential of Vossia cuspidata as a phytoremediator to accumulate heavy metals from polluted water bodies. Thirty-two quadrats, distributed equally in eight sites (six polluted sites along Ismailia canal and two unpolluted sites along the Nile River) were selected seasonally for plant, water and sediment investigations. Winter plants recorded the highest values of shoot height, diameter, and leaf width, but the lowest shoot density. Plants collected in autumn had the lowest values of leaf length, width and area, while those in spring had the highest shoot density, with the lowest shoot height...
March 21, 2017: International Journal of Phytoremediation
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