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International Journal of Phytoremediation

Tomasz Płociniczak, Ewa Fic, Magdalena Pacwa-Płociniczak, Małgorzata Pawlik, Zofia Piotrowska-Seget
The aim of this study was to assess the impact of soil inoculation with the Rhodococcus erythropolis CD 106 strain on the effectiveness of the phytoremediation of an aged hydrocarbon-contaminated (approx. 1% TPH) soil using ryegrass (Lolium perenne). The introduction of CD 106 into the soil significantly increased the biomass of ryegrass and the removal of hydrocarbons in planted soil. The fresh weight of the shoots and roots of plants inoculated with CD 106 increased by 49 and 30%, respectively. After 210 days of the experiment, the concentration of TPH was reduced by 31...
January 19, 2017: International Journal of Phytoremediation
Jingna Du, Junyi Yu
Mangrove (Kandelia obovata (S. L.)) seedlings were cultivated in rhizoboxes under different rates of phosphorus (P) and cadmium (Cd) level. The speciation distributions of P both in the rhizosphere and non-rhizosphere sediments were examined using sequential extraction procedures. P contents in different Kandelia obovata (S.L.) tissues were also determined. Results showed that considerable differences existed in P speciation distribution between rhizosphere and bulk sediments. A higher proportion of iron-bound phosphate (Fe-P) was found in the rhizosphere sediments, while a relatively higher concentration of exchangeable phosphate (Ex-P) and Al-bound phosphate (Al-P) was found in the bulk sediments...
January 19, 2017: International Journal of Phytoremediation
Marina Rafiq, Muhammad Shahid, Ghulam Abbas, Saliha Shamshad, Sana Khalid, Nabeel Khan Niazi, Camille Dumat
In this study, we determined the effect of ethylenediaminetetraacetic acid (EDTA) and calcium (Ca) on arsenic (As) uptake and toxicity to Pisum sativum. Plants were treated with three levels of As (25, 125, 250 µM) in the presence and absence of three levels of Ca (1, 5, 10 mM) and EDTA (25, 125, 250 µM). Exposure to As caused an overproduction of hydrogen peroxide (H2O2) in roots and leaves, which induced lipid peroxidation and decreased pigment contents. Application of both Ca and EDTA significantly reduced As accumulation by pea, Ca being more effective in reducing As accumulation...
January 13, 2017: International Journal of Phytoremediation
JianXiong Liao, DeNan Zhang, Azim Mallik, YuQing Huang, ChengXin He, GuangPing Xu
Wastewater from different sources show great differences in concentrations and ratios of N and P. In order to choose suitable plant species to remove excess N and/or P from polluted waters, it is important to know the performances of these plants under different N and P concentrations. In this study, we investigated the growth and N and P removal of three macrophytes, Coix lacryma-jobi, Iris wilsonii and Arundo donax under six N and P combination treatments. C. lacryma-jobi preferred higher N and P concentrations (16 mg N L(-1) and 3...
January 13, 2017: International Journal of Phytoremediation
Abolfazl Farzi, Seyed Mehdi Borghei, Manouchehr Vossoughi
This research studied the use of constructed wetlands (CWs) to reduce water salinity. For this purpose, three halophytic species of the Chenopodiaceae family (Salicornia europaea, Salsola crassa, and Bienertia cycloptera) that are resistant to saline conditions were planted in the CWs, and experiments were conducted at three different salinity levels (EC∼2, 6, 10 dS/m). Electrical conductivity (EC) and concentrations of calcium (Ca), magnesium (Mg), sodium (Na), and chlorine (Cl) were measured before and after phytoremediation with a retention time of one week...
January 13, 2017: International Journal of Phytoremediation
Nabeel Khan Niazi, Irshad Bibi, Ayesha Fatimah, Muhammad Shahid, Muhammad Tariq Javed, Hailong Wang, Yong Sik Ok, Safdar Bashir, Behzad Murtaza, Zulfiqar Ahmad Saqib, Muhammad Bilal Shakoor
In this study, we examined the potential role of phosphate (P; 0, 50, 100 mg kg(-1)) on growth, gas exchange attributes and photosynthetic pigments of Brassica napus and Brassica juncea under arsenic (As) stress (0, 25, 50, 75 mg kg(-1)) in a pot experiment. Results revealed that phosphate supplementation (P100) to As-stressed plants significantly increased shoot As concentration, dry biomass yield, and As uptake, in addition to the improved morphological and gas exchange attributes and photosynthetic pigments over P0...
January 13, 2017: International Journal of Phytoremediation
Vânia L Souza, Alex-Alan F de Almeida, Pedro A O Mangabeira, Delmira da C Silva, Raildo M de Jesus, Raúl René Valle
Erythrina fusca is an important legume used for shade cover in cacao plantations in Brazil. Cacao plantations receive large quantities of copper (Cu) containing agrochemicals, mainly for control of diseases. Therefore, Cu toxicity was investigated in seedlings grown in hydroponics with increasing concentrations of Cu (0.005 - 32 mg L(-)¹) in a greenhouse. Ultrastructural analyses showed cell plasmolysis in the root cortical area and changes in thylakoid membranes at 8 mg Cu L(-1) and higher. There were changes in epicuticular wax deposition on the leaf surface at the 16 and 32 mg Cu L(-1) treatments...
January 13, 2017: International Journal of Phytoremediation
François Courchesne, Marie-Claude Turmel, Benoît Cloutier-Hurteau, Gilbert Tremblay, Lara Munro, Jacynthe Masse, Michel Labrecque
This study determined the changes in TE (As, Cd, Cu, Ni, Pb, Zn) chemistry in the soils of a willow ('Fish Creek' - Salix purpurea, SV1 - S. x dasyclados and SX67 - S. miyabeana) plantation growing under a cold climate during a three-year trial. The soil HNO3-extractable and H2O-soluble TE concentrations and pools significantly decreased under most cultivars (Fish, SX67). Yet, TE changes showed inconsistent patterns and localized soil TE increases (Ni, Pb) were measured. Temporal changes in soil TE were also detected in control plots and sometimes exceeded changes in planted plots...
January 13, 2017: International Journal of Phytoremediation
François Courchesne, Marie-Claude Turmel, Benoît Cloutier-Hurteau, Simon Constantineau, Lara Munro, Michel Labrecque
The phytoextraction of the trace elements (TE) As, Cd, Cu, Ni, Pb and Zn by willow cultivars (Fish Creek, SV1 and SX67) was measured during a three-year field trial in a mildly contaminated soil. Biomass ranged from 2.8 to 4.4 Mg/ha/yr at 30 000 plants/ha. Shoots (62%) were the main component followed by leaves (23%) and roots (15%). Biomass was positively linked to soluble soil dissolved organic carbon (DOC), K and Mg while TE, notably Cd and Zn, had a negative effect. The TE concentration ranking was: Zn > Cu > Cd > Ni, Pb > As and distribution patterns were: i) minima in shoots (As, Ni), ii) maxima in leaves (Cd, Zn) or iii) maxima in roots (Cu, Pb)...
December 20, 2016: International Journal of Phytoremediation
Andrea Petroselli, Maurizio Giannotti, Tatiana Marras, Elena Allegrini
In dry regions, water resources have become increasingly limited, and the use of alternative sources is considered one of the main strategies in sustainable water management. A highly viable alternative to commonly used water resources is treated municipal wastewater, which could strongly benefit from advanced and low-cost techniques for depuration, such as the integrated system of phytodepuration (ISP). The current manuscript investigates four Italian case studies with different sizes and characteristics. The raw wastewaters and final effluents were sampled on a monthly basis over a period of up to five years, allowing the quantification of the ISP performances...
December 15, 2016: International Journal of Phytoremediation
Fatih Deniz, Remziye Aysun Kepekci
A green type composite biosorbent composed of pine, oak, hornbeam and fir sawdust biomasses modified with cetyltrimethylammonium bromide (CTAB) was used for biosorption of an unsafe synthetic food dye, Food Green 3 from liquid medium. Batch studies were carried by observing the effects of pH, dye concentration, biosorbent amount and contact time. The equilibrium data were analyzed using Freundlich, Langmuir and Dubinin-Radushkevich equations. Freundlich model gave a better conformity than other equations. The maximum dye removal potential of biosorbent was found to be 36...
December 12, 2016: International Journal of Phytoremediation
K Vijayaraghavan, Jesu Arockiaraj, Seralathan Kamala-Kannan
Finding appropriate rooftop vegetation may improve the quality of runoff from green roofs. Portulaca grandiflora was examined as possible vegetation for green roofs. Green roof substrate was found to have low bulk density (360.7 kg/m(3)), high water holding capacity (49.4%), air-filled porosity (21.1%) and hydraulic conductivity (5270 mm/h). The optimal substrate also supported the growth of P. grandiflora with biomass multiplication of 450.3% and relative growth rate of 0.038. Phytoextraction potential of P...
December 12, 2016: International Journal of Phytoremediation
Vimal Chandra Pandey, Tripti Mishra
A field study was carried out on fly ash dumps of Panki Thermal Power Station to assess the phytoaccumulation of elements in various plant parts of edible fruit tree Ziziphus mauritiana. Out of the twelve analysed elements, the highest concentration was found for Fe followed by Mn > Se > Zn > Mo > Cu > Cr > Pb > Cd >Ni > As > Co in rhizospheric substrate of Z. mauritiana grown on fly ash dumps. Metal accumulation, bioconcentration factor and translocation factor for each metal was calculated in various parts of the edible fruit tree...
December 12, 2016: International Journal of Phytoremediation
Xu Wang, Can Chen, Jianlong Wang
The cadmium (Cd) uptake characteristics by Sorghum bicolor cv. Nengsi 2# and Cowley from the acidic sandy loam soil (pH = 6.1) during the entire growth period (100 d) were investigated in pot outdoors in tropical district of southern China, Hainan Island. The Cd-spiked levels in soil were set as 3 mg/kg and 15 mg/kg. Correspondingly the available Cd levels in soil extracted by Mechlich III solution were 2.71 and 9.41 mg/kg, respectively. Two varieties in full growth period (100 d) basically did not show the significant difference in their growth and Cd uptake...
December 12, 2016: International Journal of Phytoremediation
Kalpana C Lakra, B Lal, T K Banerjee
Toxicity of the effluent generated at the Rajrappa coalmine complex under the Central Coalfields Limited, (CCL, a subsidiary of Coal India Limited) in Jharkhand, India was investigated. The concentrations (mg L(-1)) of all the toxic metals (Fe, Mn, Ni, Zn, Cu, Pb, Cr and Cd) in the coalmine effluent were above the safe limit suggested by the Environmental Protection Agency (EPA, 2003). Amongst these, Fe showed the highest concentration (18.21±3.865), while Cr had the lowest effluent concentration (0.15±0...
December 12, 2016: International Journal of Phytoremediation
Meenu Gautam, Divya Pandey, Madhoolika Agrawal
Due to hostile condition of red mud (RM), its utilization for vegetation is restricted. Therefore, RM with bio-wastes as soil amendment may offer suitable combination to support plant growth with reduced risk of metal toxicity. To evaluate the effects of RM on soil properties, plant growth performance and metal accumulation in lemongrass, a study was conducted using different RM concentrations (0, 5, 10 and 15% w/w) in soil amended with bio-wastes (cowdung manure (CD) or sewage-sludge (SS)). Application of RM in soil with bio-wastes improved organic matter and nutrient contents, and caused reduction in phytoavailable metal contents...
December 12, 2016: International Journal of Phytoremediation
Tamoor Ul Hassan, Asghari Bano, Irum Naz
The study was aimed to determine tolerance of PGPR in different concentration of Cu, Cr, Co, Cd, Ni, Mn and Pb and to evaluate the PGPR modulated bio-availability of different heavy metals, in the rhizosphere soil and wheat tissues, grown in saline sodic soil. Bacillus cereus and Pseudomonas moraviensis were isolated from Cenchrus ciliaris L. growing in Khewra salt range. Seven days old cultures of PGPR were applied on wheat as single inoculum, co- inoculation and carrier based biofertilizer (using maize straw and sugarcane husk as carrier)...
December 12, 2016: International Journal of Phytoremediation
Maria Sotenko, Stuart Coles, Guy Barker, Lijiang Song, Ying Jiang, Philip Longhurst, Tamara Romanova, Olga Shuvaeva, Kerry Kirwan
During the last few decades, phytoremediation process has attracted much attention because of the growing concerns about the deteriorating quality of soil caused by anthropogenic activities. Here, a tandem phytoremediation/biorefinery process was proposed as a way to turn phytoremediation into a viable commercial method by producing valuable chemicals in addition to cleaned soil. Two agricultural plants (Sinapis alba and Helianthus annuus) were grown in moderately contaminated soil with ca. 100 ppm of Ni and further degraded by a fungal lignin degrader - Phanerochaete chrysosporium...
December 12, 2016: International Journal of Phytoremediation
B Annicaert, S De Moor, L Van Nevel, E Michels, M De Fraeye, L Meiresonne, J Vangronsveld, F M G Tack, E Meers
Poplar clones were studied for their phytoextraction capacity in the second growth cycle (6 growth years) on a site in the Belgian Campine region which is contaminated with Cd and Zn via historic atmospheric deposition of nearby zinc smelter activities. The field trial revealed regrowth problems for some clone that could not be predicted in the first growth cycle. Four allometric relations were assessed for their capacity to predict biomass yield in the second growth cycle. A power function based on the shootdiameter best estimate the biomass production of poplar with R² values between 0...
December 8, 2016: International Journal of Phytoremediation
Anam Ashraf, Irshad Bibi, Nabeel Khan Niazi, Yong Sik Ok, Ghulam Murtaza, Muhammad Shahid, Anitha Kunhikrishnan, Dongwei Li, Tariq Mahmood
In the present study, we examined sorption of chromate (Cr(VI)) to acid-activated banana peel (AABP) and organo-montmorillonite (O-mont) as a function of pH, initial Cr(VI) concentration at a sorbent dose of 4 g L(-1) and at 20±1°C in aqueous solutions. In sorption edge experiments, maximum Cr(VI) removal was obtained at pH 3 after 2 hours by AABP and O-mont (88% and 69%). Sorption isotherm data showed that sorption capacity of AABP was higher than O-mont (15.1 vs. 6.67 mg g(-1), respectively, at pH 4)...
November 16, 2016: International Journal of Phytoremediation
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