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Phytoremediation of heavy metal

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https://www.readbyqxmd.com/read/28323451/phytostabilization-of-heavy-metals-by-the-emergent-macrophyte-vossia-cuspidata-roxb-griff-a-phytoremediation-approach
#1
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
https://www.readbyqxmd.com/read/28285205/soil-heavy-metal-contamination-and-health-risks-associated-with-artisanal-gold-mining-in-tongguan-shaanxi-china
#2
Ran Xiao, Shuang Wang, Ronghua Li, Jim J Wang, Zengqiang Zhang
Soil contamination with heavy metals due to mining activities poses risks to ecological safety and human well-being. Limited studies have investigated heavy metal pollution due to artisanal mining. The present study focused on soil contamination and the health risk in villages in China with historical artisanal mining activities. Heavy metal levels in soils, tailings, cereal and vegetable crops were analyzed and health risk assessed. Additionally, a botany investigation was conducted to identify potential plants for further phytoremediation...
March 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28251535/copper-tolerant-rhizosphere-bacteria-characterization-and-assessment-of-plant-growth-promoting-factors
#3
Manohari Rathi, Yogalakshmi Kadapakkam Nandabalan
Remediation of heavy metal contaminated soil is a major problem or concern worldwide. Heavy metal accumulation in the soil is increasing day by day by industries, mines, agriculture, fuel combustion and municipal waste discharge. Such contaminated soils harbour a large number of resistant microbial populations. Screening and isolation of such microbes would be utilized for natural remediation of metal contaminated soils. Therefore, in the present study, highly copper-tolerant bacteria from rhizosphere soil of Cynodon dactylon grown in brass effluent contaminated soil were isolated and assessed for plant growth promoting factors...
March 1, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28204874/effects-of-calcium-at-toxic-concentrations-of-cadmium-in-plants
#4
REVIEW
Danlian Huang, Xiaomin Gong, Yunguo Liu, Guangming Zeng, Cui Lai, Hassan Bashir, Lu Zhou, Dafei Wang, Piao Xu, Min Cheng, Jia Wan
This review provides new insight that calcium plays important roles in plant growth, heavy metal accumulation and translocation, photosynthesis, oxidative damage and signal transduction under cadmium stress. Increasing heavy metal pollution problems have raised word-wide concerns. Cadmium (Cd), being a highly toxic metal, poses potential risks both to ecosystems and human health. Compared with conventional technologies, phytoremediation, being cost-efficient, highly stable and environment-friendly, is believed to be a promising green technology for Cd decontamination...
February 15, 2017: Planta
https://www.readbyqxmd.com/read/28188207/use-of-endophytic-and-rhizosphere-bacteria-to-improve-phytoremediation-of-arsenic-contaminated-industrial-soils-by-autochthonous-betula-celtiberica
#5
Victoria Mesa, Alejandro Navazas, Ricardo González-Gil, Aida González, Nele Weyens, Béatrice Lauga, Jose Luis R Gallego, Jesús Sánchez, Ana Isabel Peláez
The aim of the study was to investigate the potential of indigenous arsenic-tolerant bacteria to enhance arsenic phytoremediation by autochthonous pseudometallophyte Betula celtiberica The first goal was to perform an initial analysis of the entire rhizosphere and endophytic bacterial communities of the above-named accumulator plant, including the cultivable bacterial species. B. celtiberica's microbiome was dominated by taxa related to Flavobacteriales, Burkholderiales, and Pseudomonadales, specially the Pseudomonas and Flavobacterium genera...
February 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28185852/pyrolysis-for-exploitation-of-biomasses-selected-for-soil-phytoremediation-characterization-of-gaseous-and-solid-products
#6
Paola Giudicianni, Stefania Pindozzi, Corinna Maria Grottola, Fernando Stanzione, Salvatore Faugno, Massimo Fagnano, Nunzio Fiorentino, Raffaele Ragucci
Biomasses to be used in the phytoremediation process are generally selected to match agronomic parameters and heavy metals uptake ability. A proper selection can be made greatly effective if knowledge of the properties of the residual char from pyrolysis is available to identify possible valorization routes. In this study a comparative analysis of the yields and characteristics of char obtained from slow pyrolysis of five uncontaminated biomasses (Populus nigra, Salix alba, Fraxinus oxyphylla, Eucalyptus occidentalis and Arundo donax) was carried out under steam atmosphere to better develop char porosity...
February 7, 2017: Waste Management
https://www.readbyqxmd.com/read/28185077/phytochelatin-2-accumulates-in-roots-of-the-seagrass-enhalus-acoroides-collected-from-sediment-highly-contaminated-with-lead
#7
Xuan-Vy Nguyen, Khanh-Hy Le-Ho, Jutta Papenbrock
Phytochelatins (PCs), the heavy metal-binding peptides of plants, play a main function in heavy metal detoxification. In this study, Enhalus acoroides samples collected at six distinct seagrass beds from the coast of Khanh Hoa province, Viet Nam, were evaluated for their PCs. The contents of different PCs in each organ including leaf, rhizome, and root were determined by using HPLC analysis. Significant differences of PC2 contents among specific organs and their relation were tested by ANOVA, Tukey test, and Pearson's correlation...
February 9, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28139323/photosynthesis-and-aboveground-carbon-allocation-of-two-co-occurring-poplar-species-in-an-urban-brownfield
#8
Diane Radwanski, Frank Gallagher, Dirk W Vanderklein, Karina V R Schäfer
Phytoremediation, a technique used to reclaim heavy metal-contaminated soils, requires an understanding of plant physiological responses to heavy metals. However, the majority of studies documenting heavy metal impact on plant functioning have been performed in laboratory or greenhouse settings. We predicted that increased soil heavy metal concentrations reduce photosynthesis and biomass production in trees growing in metal contaminated soil in a naturally re-vegetated urban brownfield. Leaf gas exchange, leaf carbon and nitrogen concentration, and tree biomass were recorded and compared for Populus deltoides and Populus tremuloides growing in an urban brownfield...
April 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28092006/the-efficiency-of-eichhornia-crassipes-in-the-removal-of-organic-and-inorganic-pollutants-from-wastewater-a-review
#9
Saurabh Mishra, Abhijit Maiti
Water is a basic necessity of life, but due to overextraction and heavy input of nutrients from domestic and industrial sources, the contamination level of water bodies increase. In the last few decades, a potential interest has been aroused to treat wastewater by biological methodologies before discharge into the natural water bodies. Phytoremediation using water hyacinth is found to be an effective biological wastewater treatment method. Water hyacinth (Eichhornia crassipes), a notorious weed, being the most promising plant for removal of contaminants from wastewater is studied extensively in this regard...
January 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28073642/long-term-impact-of-primary-domestic-sewage-on-metal-loid-accumulation-in-drainage-ditch-sediments-plants-and-water-implications-for-phytoremediation-and-restoration
#10
Mathieu Nsenga Kumwimba, Bo Zhu, Fidèle Suanon, Diana Kavidia Muyembe, Mawuli Dzakpasu
We evaluate the long-term performance of a vegetated drainage ditch (VDD) treating domestic sewage with respect to heavy metal/metalloid (HM/M) accumulation in sediments, plants and water. VDD sediment contained significantly higher macro and trace elements compared to an agricultural ditch (AD) sediment. However, concentrations of HM/Ms in VDD sediment were below the ranges considered toxic to plants. Most HM/Ms were efficiently removed in the VDD, whereby removal efficiencies varied between 11% for Al and 89% for K...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28061428/phytoremediation-strategies-for-soils-contaminated-with-heavy-metals-modifications-and-future-perspectives
#11
REVIEW
Nadeem Sarwar, Muhammad Imran, Muhammad Rashid Shaheen, Wajid Ishaque, Muhammad Asif Kamran, Amar Matloob, Abdur Rehim, Saddam Hussain
Presence of heavy metals in agricultural soils is of major environmental concern and a great threat to life on the earth. A number of human health risks are associated with heavy metals regarding their entry into food chain. Various physical, chemical and biological techniques are being used to remove heavy metals and metalloids from soils. Among them, phytoremediation is a good strategy to harvest heavy metals from soils and have been proven as an effective and economical technique. In present review, we discussed various sources and harmful effects of some important heavy metals and metalloids, traditional phytoremediation strategies, mechanisms involved in phytoremediation of these metals, limitations and some recent advances in phytoremediation approaches...
December 23, 2016: Chemosphere
https://www.readbyqxmd.com/read/28040555/juncus-spp-the-helophyte-for-all-phyto-remediation-purposes
#12
Evdokia Syranidou, Stavros Christofilopoulos, Nicolas Kalogerakis
Helophytic plants contribute significantly to the remediation of ecosystems through a wide range of physiological or biochemical mechanisms including the role of endophytic bacteria. This review highlights the services provided by Juncus spp. wetland plants, from phytoremediation of soils and groundwater with heavy metals and/or organics to municipal or industrial wastewater treatment in constructed wetlands. The data presented also provide information on the efficiency of specific Juncus spp. in response to various metals and organic compounds, in an effort to exploit the natural capabilities of autochthonous over exotic species in phytoremediation strategies...
December 28, 2016: New Biotechnology
https://www.readbyqxmd.com/read/28038419/comparison-of-arbuscular-mycorrhizal-fungal-effects-on-the-heavy-metal-uptake-of-a-host-and-a-non-host-plant-species-in-contact-with-extraradical-mycelial-network
#13
Mejda Mnasri, Martina Janoušková, Jana Rydlová, Chedly Abdelly, Tahar Ghnaya
The effects of inoculation with an arbuscular mycorrhizal (AM) fungus on Cd and Ni tolerance and uptake in Medicago sativa, an AM host, and Sesuvium portulacastrum, a non-host plant, were investigated in a greenhouse experiment. The plants were cultivated in sterilized sand in a two-compartmented system, which prevented root competition but enabled colonization of the whole substrate by AM fungal extraradical mycelium. M. sativa was either left non-inoculated or inoculated with the AM fungus Rhizophagus irregularis, and both plants were either cultivated without heavy metal (HM) addition or supplied with cadmium (Cd) or nickel (Ni), each in two doses...
December 22, 2016: Chemosphere
https://www.readbyqxmd.com/read/28018398/cadmium-accumulation-characteristics-in-turnip-landraces-from-china-and-assessment-of-their-phytoremediation-potential-for-contaminated-soils
#14
Xiong Li, Xiaoming Zhang, Ya Yang, Boqun Li, Yuansheng Wu, Hang Sun, Yongping Yang
Heavy metal (HM) pollution is a global environmental problem that threatens ecosystem and human health. Cadmium (Cd) pollution is the most prominent HM pollution type because of its high toxicity, strong migration, and the large polluted area globally. Phytoremediation of contaminated soil is frequently practiced because of its cost-effectiveness and operability and because it has no associated secondary pollution. High-accumulation plants, including those identified as hyperaccumulators, play an important role in phytoremediation...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27958371/atmospheric-deposition-carried-zn-and-cd-from-a-zinc-smelter-and-their-effects-on-soil-microflora-as-revealed-by-16s-rdna
#15
Feng Shen, Yanxia Li, Min Zhang, Mukesh Kumar Awasthi, Amjad Ali, Ronghua Li, Quan Wang, Zengqiang Zhang
In this study, we investigated the influence of heavy metals (HM) on total soil bacterial population and its diversity pattern from 10 km distance of a Zinc smelter in Feng County, Qinling Mountain, China. We characterized and identified the bacterial community in a HM polluted soil using 16S rDNA technology. Out results indicated that the maximum soil HM concentration and the minimum bacterial population were observed in S2 soil, whereas bacterial diversity raised with the sampling distance increased. The bacterial communities were dominated by the phyla Proteobacteria, Acidobacteria and Actinobacteria in cornfield soils, except Fimicutes phylum which dominated in hilly area soil...
December 13, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27951500/phytoremediation-effect-of-scirpus-triqueter-inoculated-plant-growth-promoting-bacteria-pgpb-on-different-fractions-of-pyrene-and-ni-in-co-contaminated-soils
#16
Xiao Chen, Xiaoyan Liu, Xinying Zhang, Liya Cao, Xiaoxin Hu
At present, few reveal the mechanism of inoculation plants with PGPB to remediate PAH-metal co-contaminated soil by analyzing the chemical speciations of contaminants. This study investigated the influence of inoculation plants with PGPB on different fractions of pyrene and Ni in rhizospheric and non-rhizospheric soil. The results demonstrated that the addition of PGPB brought the extensive increase of FDA activities in pyrene-Ni co-contaminated soil. PGPB increased the resistance of plants in nickel and pyrene-Ni contaminated soil, but decreased the plant biomass in single pyrene contaminated soil...
March 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930707/native-phytoremediation-potential-of-urtica-dioica-for-removal-of-pcbs-and-heavy-metals-can-be-improved-by-genetic-manipulations-using-constitutive-camv-35s-promoter
#17
Jitka Viktorova, Zuzana Jandova, Michaela Madlenakova, Petra Prouzova, Vilem Bartunek, Blanka Vrchotova, Petra Lovecka, Lucie Musilova, Tomas Macek
Although stinging nettle (Urtica dioica) has been shown to reduce HM (heavy metal) content in soil, its wider phytoremediation potential has been neglected. Urtica dioica was cultivated in soils contaminated with HMs or polychlorinated biphenyls (PCBs). After four months, up to 33% of the less chlorinated biphenyls and 8% of HMs (Zn, Pb, Cd) had been removed. Bacteria were isolated from the plant tissue, with the endophytic bacteria Bacillus shackletonii and Streptomyces badius shown to have the most significant effect...
2016: PloS One
https://www.readbyqxmd.com/read/27928750/phytoextraction-of-arsenic-contaminated-soil-with-pteris-vittata-in-henan-province-china-comprehensive-evaluation-of-remediation-efficiency-correcting-for-atmospheric-depositions
#18
Mei Lei, Xiaoming Wan, Guanghui Guo, Junxing Yang, Tongbin Chen
Research on the appropriate method for evaluating phytoremediation efficiency is limited. A 2-year field experiment was conducted to investigate phytoremediation efficiency using the hyperaccumulator Pteris vittata on an arsenic (As)-contaminated site. The remediation efficiency was evaluated through the removal rate of As in soils and extraction rate of heavy metals in plants. After 2 years of remediation, the concentration of total As in soils decreased from 16.27 mg kg(-1) in 2012 to 14.58 mg kg(-1) in 2014...
December 7, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27888434/a-novel-heavy-metal-atpase-peptide-from-prosopis-juliflora-is-involved-in-metal-uptake-in-yeast-and-tobacco
#19
Nisha S Keeran, G Ganesan, Ajay K Parida
Heavy metal pollution of agricultural soils is one of the most severe ecological problems in the world. Prosopis juliflora, a phreatophytic tree species, grows well in heavy metal laden industrial sites and is known to accumulate heavy metals. Heavy Metal ATPases (HMAs) are ATP driven heavy metal pumps that translocate heavy metals across biological membranes thus helping the plant in heavy metal tolerance and phytoremediation. In the present study we have isolated and characterized a novel 28.9 kDa heavy metal ATPase peptide (PjHMT) from P...
November 25, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27882491/influence-of-phosphorous-fertilization-on-copper-phytoextraction-and-antioxidant-defenses-in-castor-bean-ricinus-communis-l
#20
Guoyong Huang, Muhammad Shahid Rizwan, Chao Ren, Guangguang Guo, Qingling Fu, Jun Zhu, Hongqing Hu
Application of fertilizers to supply appropriate nutrients has become an essential agricultural strategy for enhancing the efficiency of phytoremediation in heavy metal contaminated soils. The present study was conducted to investigate the beneficial effects of three types of phosphate fertilizers (i.e., oxalic acid-activated phosphate rock (APR), Ca(H2PO4)2, and NaH2PO4) in the range of 0-600 mg P kg(-1) soil, on castor bean growth, antioxidants [antioxidative enzymes and glutathione (GSH)], and Cu uptake...
November 23, 2016: Environmental Science and Pollution Research International
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