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https://www.readbyqxmd.com/read/28545213/safe-utilization-of-heavy-metal-contaminated-farmland-by-mulberry-tree-cultivation-and-silk-production
#1
Xiaoming Wan, Mei Lei, Tongbin Chen, Yongbi Tan, Junxing Yang
Heavy-metal-contaminated soil threatens human health and environmental safety. Complete remediation of contaminated soil is expensive; therefore, phytomanagement has emerged as a cost-effective alternative. The current study investigated mulberry tree (Morus alba) plantation, silkworm cultivation, and silk production as phytomanagement options. Results defined the safety of planting mulberry trees in soils with lead (Pb) and arsenic (As) concentrations lower than 369 and 180mgkg(-1), respectively. Silkworms fed with mulberry leaves collected from slightly contaminated soil exhibited productive growth and normal silk production...
May 21, 2017: Science of the Total Environment
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
#2
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/28531917/assessing-phytotoxicity-of-trace-element-contaminated-soils-phytomanaged-with-gentle-remediation-options-at-ten-european-field-trials
#3
Celestino Quintela-Sabarís, Lilian Marchand, Petra S Kidd, Wolfgang Friesl-Hanl, Markus Puschenreiter, Jurate Kumpiene, Ingo Müller, Silke Neu, Jolien Janssen, Jaco Vangronsveld, Ioannis Dimitriou, Grzegorz Siebielec, Rafał Gałązka, Valérie Bert, Rolf Herzig, Andrew B Cundy, Nadège Oustrière, Aliaksandr Kolbas, William Galland, Michel Mench
Gentle remediation options (GRO), i.e. in situ stabilisation, (aided) phytoextraction and (aided) phytostabilisation, were implemented at ten European sites contaminated with trace elements (TE) from various anthropogenic sources: mining, atmospheric fallout, landfill leachates, wood preservatives, dredged-sediments, and dumped wastes. To assess the performance of the GRO options, topsoil was collected from each field trial, potted, and cultivated with lettuce (Lactuca sativa L.) for 48days. Shoot dry weight (DW) yield, photosynthesis efficiency and major element and TE concentrations in the soil pore water and lettuce shoots were measured...
May 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531837/possible-developments-for-ex-situ-phytoremediation-of-contaminated-sediments-in-tropical-and-subtropical-regions-review
#4
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/28479231/assisted-green-remediation-of-chromium-pollution
#5
M Gheju, I Balcu
The effects of application of two anions commonly found in subsurface environments, phosphate (PO4(3-)) and sulfate (SO4(2-)), on hexavalent chromium (Cr(VI)) uptake and translocation by Zea mays, were investigated using pot-culture experiments. The two anions were tested as potential agents to mobilize Cr(VI) from polluted soil (50, 75 and 100 mg kg(-1) dw) at a dose of 16.7 mmol kg(-1). Metal uptake from soil to roots and subsequent transfer to shoots was discussed in terms of bioconcentration factor (BCF) and translocation factor (TF)...
May 4, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28458213/decapitation-improves-the-efficiency-of-cd-phytoextraction-by-celosia-argentea-linn
#6
Jie Liu, Xuehong Zhang, Lingyun Mo, Shiyin Yao, Yixuan Wang
The effect of decapitation on enhancing plant growth and Cd accumulation in Celosia argentea Linn. was evaluated using a pot experiment. Decapitation significantly enhanced the growth of C. argentea. The numbers of branch and leaf in the decapitated plants (DP) were significantly higher than those in undecapitated plants (UDP, p < 0.05). Decapitation increased the biomass by 75%-105% for roots, 108%-152% for stems, and 80%-107% for leaves. Although the transpiration and photosynthesis rates were not significantly different between DP and UPD, decapitation significantly increased the total leaf area and total transpiration per plant (p < 0...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28456920/non-enhanced-phytoextraction-of-cadmium-zinc-and-lead-by-high-yielding-crops
#7
Markéta Mayerová, Šárka Petrová, Mikuláš Madaras, Jan Lipavský, Tomáš Šimon, Tomáš Vaněk
Heavy metal soil contamination from mining and smelting has been reported in several regions around the world, and phytoextraction, using plants to accumulate risk elements in aboveground harvestable organs, is a useful method of substantially reducing this contamination. In our 3-year experiment, we tested the hypothesis that phytoextraction can be successful in local soil conditions without external fertilizer input. The phytoextraction efficiency of 15 high-yielding crop species was assessed in a field experiment performed at the Litavka River alluvium in the Příbram region of Czechia...
April 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28452034/deciphering-biodegradable-chelant-enhanced-phytoremediation-through-microbes-and-nitrogen-transformation-in-contaminated-soils
#8
Linchuan Fang, Mengke Wang, Lin Cai, Long Cang
Biodegradable chelant-enhanced phytoremediation offers an alternative treatment technique for metal contaminated soils, but most studies to date have addressed on phytoextraction efficiency rather than comprehensive understanding of the interactions among plant, soil microbes, and biodegradable chelants. In the present study, we investigated the impacts of biodegradable chelants, including nitrilotriacetate, S,S-ethylenediaminedisuccinic acid (EDDS), and citric acid on soil microbes, nitrogen transformation, and metal removal from contaminated soils...
April 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28448157/protein-changes-in-lepidium-sativum-l-exposed-to-hg-during-soil-phytoremediation
#9
Beata Smolinska, Agnieszka Szczodrowska, Joanna Leszczynska
Some investigations have been carried out in this study to find the best technique of soil reclamation in mercurypolluted soil. In this study, we examined Lepidium sativum L. as a plant useful for Hg phytoextraction. The simultaneous application of compost and thiosulfate was explored as a possible method of enhancing the process of phytoextraction. The results of the investigations of plant protein changes during assisted Hg phytoextraction were also provided. The results of the study show that combined use of compost and thiosulfate significantly increased both the total Hg accumulation and its translocation to aerial plant tissues...
August 3, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28441624/various-soil-amendments-and-environmental-wastes-affect-the-im-mobilization-and-phytoavailability-of-potentially-toxic-elements-in-a-sewage-effluent-irrigated-sandy-soil
#10
Sabry M Shaheen, Mohamed S Shams, Mohamed R Khalifa, Mohamed A El-Dali, Jörg Rinklebe
Contamination of long-term sewage effluent irrigated soils by potentially toxic elements (PTEs) is a serious concern due to its high environmental and health risk. Our scientific hypothesis is that soil amendments can cause contradictory effects on the element mobilization and phytoavailability depending on the type of element and amendment. Therefore, we aimed to assess the impact of the application (1%) of several low cost amendments and environmental wastes on the (im)mobilization, availability, and uptake of Al, Cd, Cr, Cu, Fe, Mn, Ni, and Zn by sorghum (Sorghum bicolor) in a long term sewage effluent irrigated sandy soils collected from Egypt...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28441038/phytoextraction-of-nitrogen-and-phosphorus-by-crops-grown-in-a-heavily-manured-dark-brown-chernozem-under-contrasting-soil-moisture-conditions
#11
Ikechukwu Agomoh, Xiying Hao, Francis Zvomuya
Repeated uptake of excess nutrients by crops in soils with a long history of manure application may be a viable option for reducing the nutrient levels. In this greenhouse study, we examined the effectiveness of six 40-day cycles of barley, canola, corn, oat, pea, soybean, and triticale, all grown under two moisture regimes (100% and 50% soil field capacity, SFC), at extracting nitrogen (N) and phosphorus (P) from a Dark Brown Chernozem that had received 180 Mg ha(-1) (wet wt.) of beef cattle feedlot manure annually for 38 years...
April 25, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28441031/lead-accumulation-and-distribution-in-maize-seedlings-relevance-to-biomass-sproduction-and-metal-phytoextraction
#12
Dmitry I Bashmakov, Alina N Kluchagina, Przemysław Malec, Kazimierz Strzałka, Alexander S Lukatkin
Among trace metals, lead is a highly toxic contaminant, being hazardous to humans and animals. Application of maize plants for phytoremediation of polluted soils and waters has recently been of particular interest. The aim of this work is to investigate the Pb-phytoextraction potential of the maize cv. Tzariza used widely in Eastern European agriculture. Maize seedlings were exposed in a nutrient solution to 0.1 - 10000 µM of Pb2+ for 21 days. Lead accumulated mostly in conductive tissues and shoots at 0...
April 25, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28437478/metal-accumulation-by-sunflower-helianthus-annuus-l-and-the-efficacy-of-its-biomass-in-enzymatic-saccharification
#13
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
#14
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/28421524/distance-dependent-varieties-of-microbial-community-structure-and-metabolic-functions-in-the-rhizosphere-of-sedum-alfredii-hance-during-phytoextraction-of-a-cadmium-contaminated-soil
#15
Wenhao Yang, Taoxiang Zhang, Sen Lin, Wuzhong Ni
The recovery of microbial community and activities is crucial to the remediation of contaminated soils. Distance-dependent variations of microbial community composition and metabolic characteristics in the rhizospheric soil of hyperaccumulator during phytoextraction are poorly understood. A 12-month phytoextraction experiment with Sedum alfredii in a Cd-contaminated soil was conducted. A pre-stratified rhizobox was used for separating sub-layer rhizospheric (0-2, 2-4, 4-6, 6-8, 8-10 mm from the root mat)/bulk soils...
April 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28411316/phytoextraction-of-rare-earth-elements-in-herbaceous-plant-species-growing-close-to-roads
#16
Patrycja Mikołajczak, Klaudia Borowiak, Przemysław Niedzielski
The aim of study was to determine the phytoextraction of rare earth elements (REEs) to roots, stems and leaves of five herbaceous plant species (Achillea millefolium L., Artemisia vulgaris L., Papaver rhoeas L., Taraxacum officinale AND Tripleurospermum inodorum), growing in four areas located in close proximity to a road with varied traffic intensity. Additionally, the relationship between road traffic intensity, REE concentration in soil and the content of these elements in plant organs was estimated. A. vulgaris and P...
April 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28386947/the-potential-of-genetic-engineering-of-plants-for-the-remediation-of-soils-contaminated-with-heavy-metals
#17
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/28386894/photosynthetic-pigments-and-peroxidase-activity-of-lepidium-sativum-l-during-assisted-hg-phytoextraction
#18
Beata Smolinska, Joanna Leszczynska
The study was conducted to evaluate metabolic answer of Lepidium sativum L. on Hg, compost, and citric acid during assisted phytoextraction. The chlorophyll a and b contents, total carotenoids, and activity of peroxidase were determined in plants exposed to Hg and soil amendments. Hg accumulation in plant shoots was also investigated. The pot experiments were provided in soil artificially contaminated by Hg and/or supplemented with compost and citric acid. Hg concentration in plant shoots and soil substrates was determined by cold vapor atomic absorption spectroscopy (CV-AAS) method after acid mineralization...
April 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28343956/effect-of-cd-2-and-cd-2-auxin-mixtures-on-lipid-monolayers-model-membrane-studies-on-the-role-of-auxins-in-phytoremediation-of-metal-ions-from-contaminated-environment
#19
Katarzyna Hąc-Wydro, Marzena Mach, Karolina Węder, Katarzyna Pająk, Paweł Wydro
In this work Langmuir monolayer experiments were performed to analyze the effect of Cd(2+) ions and their mixtures with synthetic auxin (1-naphthaleneacetic acid - NAA) on lipid films. These investigations were motivated by the fact that auxins act effectively as the agents improving the removal of metal ions from contaminated water and soil by plants (phytoextraction), and although their mechanism of action in this area is still unclear, it was suggested that it can be membrane-related. The experiments were done for one component (1,2-dipalmitoyl-sn-glycero-3-phosphocholine - DPPC; 1,2-dioleoyl-sn-glycero-3-phosphocholine - DOPC; 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (sodium salt) - DPPG) monolayers and mixed (DPPG/DOPC and DPPG/DPPC) films treated as model of plant leaves membranes...
March 23, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28323452/how-to-manage-plant-biomass-originated-from-phytotechnologies-gathering-perceptions-from-end-users
#20
V Bert, S Neu, I Zdanevitch, W Friesl-Hanl, S Collet, R Gaucher, M Puschenreiter, I Müller, J Kumpiene
A questionnaire survey was carried out in 4 European countries to gather end-user's perceptions of using plants from phytotechnologies in combustion and anaerobic digestion (AD). 9 actors of the wood energy sector from France, Germany and Sweden, and 11 AD platform operators from France, Germany and Austria were interviewed. Questions related to installation, input materials, performed analyses, phytostabilization and phytoextraction. Although the majority of respondents did not know phytotechnologies, results suggested that plant biomass from phytomanaged areas could be used in AD and combustion, under certain conditions...
March 21, 2017: International Journal of Phytoremediation
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