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International Journal of Phytoremediation

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https://www.readbyqxmd.com/read/30156924/physiology-and-selected-genes-expression-under-cadmium-stress-in-arundo-donax-l
#1
Shahida Shaheen, Rafiq Ahmad, Qaisar Mahmood, Hussani Mubarak, Nosheen Mirza, Malik Tahir Hayat
The effects of cadmium stress (0, 25, 50, 75, and 100 mg/L) on morpho-physiological features and selected genes (carotenoid hydroxilase, amidase, GR, bHLH, NRAMP and YSL) expression were demonstrated in Arundo donax L. The plants were assessed for Cd uptake and its effects on chlorophyll and antioxidants after 30 days of exposure. The expression of genes conferring metal tolerance was evaluated after 10 days of Cd exposure. The results showed a maximum Cd uptake in roots (872 mg/kg) followed by stem (734 mg/kg) and leaves (298 mg/kg) at highest supplied Cd concentration...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156923/simultaneous-hyperaccumulation-of-cadmium-and-manganese-in-celosia-argentea-linn
#2
Jie Liu, Lingyun Mo, Xuehong Zhang, Shiyin Yao, Yixuan Wang
To indentify Mn/Cd co-hyperaccumulatoion in Celosia argentea Linn., 2 pot experiments were conducted using Cd/Mn-amended and real contaminated soils, respectively. The interaction between Cd and Mn with regard to their accumulation in the plants was also assessed. The results indicated that C. argentea can simultaneously hyperaccumulate Cd and Mn. The maximum Cd and Mn concentrations in leaves were 276 and 29,000 mg/kg, respectively. Mn application significantly enhanced the biomass production and Cd accumulation in shoots (p < 0...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156922/treatment-efficiency-of-a-hybrid-constructed-wetland-system-for-municipal-wastewater-and-its-suitability-for-crop-irrigation
#3
Zeshan Ali, Ashiq Mohammad, Yousaf Riaz, Umar Masood Quraishi, Riffat Naseem Malik
Design and implementation of wastewater treatment is inevitable due to toxic effects of wastewater irrigation on crops, soil and human health. Current investigation is the pioneer attempt on full-scale hybrid constructed wetland system (HCWS) built for municipal wastewater treatment from Pakistan. HCWS was comprised of vertical sub-surface flow constructed wetland (VSSF-CW) and five phyto-treatment ponds connected in series. Higher environmental risk was associated with untreated municipal wastewater usage in irrigation as estimated through discharge of metals to recipient soils...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156921/adsorption-of-ethidium-bromide-from-aqueous-solution-onto-nutraceutical-industrial-fennel-seed-spent-kinetics-and-thermodynamics-modeling-studies
#4
Razia Sulthana, Syed Noeman Taqui, Farhan Zameer, Usman Taqui Syed, Akheel Ahmed Syed
Dye pollutants from research laboratories are one of the major sources for environmental contamination. In the present study, a nutraceutical industrial fennel seed spent (NIFSS) was explored as potential adsorbent for removal of ethidium bromide (EtBr) from aqueous solution. The adsorbent was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Through batch experiments, the operating variables like initial dye concentration, adsorbent dosage, temperature, contact time, and pH were optimized...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156920/phycoremediation-resultant-lipid-production-and-antioxidant-changes-in-green-microalgae-chlorella-sp
#5
K V Ajayan, C C Harilal, M Selvaraju
In this investigation, we report on the treatment of tannery wastewater using microalgae Chlorella species to produce lipid and fatty acid as well as changes in antioxidant metabolism during the treatment. The variation in growth, production of pigments, antioxidant metabolism, lipid and fatty acids, and nutrient removal from wastewater during the remediation were observed. Surprisingly, a profuse growth was found in 50% diluted tannery wastewater (TW), which supported to accumulate high yield of lipid (18...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156919/enhancement-of-the-efficiency-of-cd-phytoextraction-using-bacterial-endophytes-isolated-from-chromolaena-odorata-a-cd-hyperaccumulator
#6
Onsiri Siripan, Arinthip Thamchaipenet, Wunrada Surat
Phytoextraction is a technique using a hyperaccumulator to remove heavy metals from soil. The efficiency of heavy metal uptake can be enhanced by the inoculation of endophytes. In this study, we isolated and identified 23 endophytes from Chromolaena odorata, a cadmium (Cd) hyperaccumulator that consisted of 19 bacteria, 2 actinomycetes and 2 fungi. All bacteria and fungi could produce at least 1 plant growth promoting factors. However, only 4 bacterial isolates; Paenibacillus sp. SB12, Bacillus sp. SB31, Bacillus sp...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156918/optimization-of-arsenic-phytoremediation-using-eichhornia-crassipes
#7
Tamara Daiane de Souza, Alisson Carraro Borges, Antonio Teixeira de Matos, Renato Welmer Veloso, Amanda Fernandes Braga
This study aimed to evaluate the pH, phosphate, and nitrate in the process of arsenic absorption by Eichhornia crassipes (water hyacinth), using the surface response methodology, in order to optimize the process. The plants were exposed to a concentration of arsenic of 0.5 mg L-1 (NaAsO2 ) over a period of 10 days. The results indicated optimal levels for the absorption of arsenic by E. crassipes at pH equal to 7.5, absence of phosphate, and minimum nitrate level of 0.0887 mmol L-1 . For the tested concentration, E...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156917/exogenous-glutathione-increased-lead-uptake-and-accumulation-in-iris-lactea-var-chinensis-exposed-to-excess-lead
#8
Haiyan Yuan, Zhi Guo, Qingquan Liu, Chunsun Gu, Yongheng Yang, Yongxia Zhang, Om Parkash Dhankher, Suzhen Huang
Long- and short-term hydroponic experiments were conducted to study the effect of different concentrations of exogenous glutathione (GSH) on Pb uptake, translocation, and gene expresses in Iris lactea var. chinensis exposed to excess lead (Pb). Exogenous GSH remarkedly promoted Pb uptake and translocation in long-term (14 d) experiment, and the GSH-dose-dependent increases in shoot and root Pb contents existed obviously when GSH concentrations were lower than 800 mg·L-1 . The fresh weight in gradual rise in plants was observed with the increase of exogenous GSH concentration...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156916/effects-of-plant-growth-regulators-da-6-and-6-ba-and-edds-chelator-on-phytoextraction-and-detoxification-of-cadmium-by-amaranthus-hybridus-linn
#9
Zhangwei Li, Rushan Zhang, Huimin Zhang
In this study, pot experiments were carried out to investigative the effects of growth-promoting hormone diethyl aminoethyl hexanoate (DA-6), 6-Benzylaminopurine (6-BA), and chelator [S,S]-Ethylenediaminedisuccinic acid (EDDS) when applied to soil contaminated with cadmium (Cd). The substances were applied alone and in combination to assess their impact on biomass, Cd phytoextraction, subcellular distribution, and chemical forms in Cd hyperaccumulator Amaranthus hybridus Linn. (A. hybridus). Results showed that the treatment of EDDS alone inhibited plant growth, and raised the Cd concentration in the plant shoot and root...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156915/subcellular-distribution-and-chemical-forms-of-cd-in-bougainvillea-spectabilis-willd-as-an-ornamental-phytostabilizer-an-integrated-consideration
#10
Wenjing Wang, Minzhe Zhang, Jianv Liu
The effects of Cd stress on the growth and Cd accumulation of Bougainvillea spectabilis Willd. as an ornamental plant and the related mechanisms were investigated in the study. We studied the impact of Cd on the plant ultrastructure, examined the cellular distribution of Cd, explored the Cd chemical forms and transformation, and determined the organic acid secretion in the plants. The results showed that B. spectabilis could grow well in the Cd treatment groups, and the roots could accumulate high concentration of Cd...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30156914/the-metal-distribution-and-the-change-of-physiological-and-biochemical-process-in-soybean-and-mung-bean-plants-under-heavy-metal-stress
#11
Fei Mao, Guanjun Nan, Meng Cao, Yuqiong Gao, Liying Guo, Xianxin Meng, Guangde Yang
Soybean [Glycine max (Linn.) Merrill] and mung bean [Vigna radiate (Linn.) Wilczek] plants were challenged with 5 kinds of heavy metals [cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb) and mercury (Hg)] in a hydroponic system. We applied 4 different metal treatments to study the effects of heavy metals on several physiological and biochemical parameters in these species, including root length, heavy metal concentrations and allocation in different organs, superoxide dismutase, catalase, and peroxidase activities, the content of malondialdehyde (MDA), protein and chlorophyll...
September 19, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095314/compared-the-physiological-response-of-two-petroleum-tolerant-contrasting-plants-to-petroleum-stress
#12
Hui Ma, Ao Wang, Menghua Zhang, Haoge Li, Sisi Du, Liping Bai, Shuisen Chen, Ming Zhong
Petroleum not only benefits the world economy but also contaminates the soil. In order to select the plants tolerant to petroleum, the physiological response of two petroleum tolerant-contrasting plants, Mirabilis jalapa and Orychophragmus violace, were investigated in variation of petroleum-contaminated soils (0, 5, 10, 20, and 40 g petroleum per kg soil) for 120 d. Petroleum degradation rate, seeds germination rate, free proline, and superoxide dismutase and peroxidase activities of M. jalapa were higher than that of O...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095313/the-chelating-effect-of-citric-acid-oxalic-acid-amino-acids-and-pseudomonas-fluorescens-bacteria-on-phytoremediation-of-cu-zn-and-cr-from-soil-using-suaeda-vera
#13
Melisa Gómez-Garrido, José Mora Navarro, Francisco J Murcia Navarro, Ángel Faz Cano
Phytoextraction is a green technique for the removal of soil contaminants by plants uptake with the subsequent elimination of the generated biomass. The halophytic plant Suaeda vera Forssk. ex J.F.Gmel. is an native Mediterranean species able to tolerate and accumulate salts and heavy metals in their tissues. The objective of this study was to explore the potential use of S. vera for soil metal phytoextraction and to assess the impact of different chelating agents such as natural organic acids (oxalic acid [OA], citric acid [CA]), amino acids (AA) and Pseudomonas fluorescens bacteria (PFB) on the metal uptake and translocation...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095312/comparison-of-distichlis-spicata-and-suaeda-aegyptiaca-in-response-to-water-salinity-candidate-halophytic-species-for-saline-soils-remediation
#14
Mohammad R Sabzalian, Soleyman Dayani, Mehran Torkian, John E Leake
Distichlis spicata and Suaeda aegyptiaca are two potential halophytic plant species for bioremediation of salt degraded soils, and development of saline agriculture. The physiological responses of the species to different levels of salinity (EC 0, 12, 24, 36, and 48 dS/m) in a controlled environment experiment were studied. Both species showed a high level of tolerance to elevated concentrations of salt in the irrigation water. The shoot fresh and dry weights in S. aegyptiaca increased till 36 dS/m and were sustained under 48 dS/m while in D...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095311/human-health-risks-from-consuming-cabbage-brassica-oleracea-l-var-capitata-grown-on-wastewater-irrigated-soil
#15
Tarek M Galal, Ahmed A Khalafallah, Omar E Elawa, Loutfy M Hassan
The present study investigated the impact of cumulative irrigation with wastewater on the soil properties and, its health hazards on the consumers of cabbage plants at south Cairo Province, Egypt. Irrigation water, soil and cabbage plants were sample d from two polluted and other two unpolluted farms. The physicochemical properties of water and soil were analyzed and the growth parameters, as well as nutrients and heavy metals concentration in cabbage were investigated. In addition, the daily intake of metals (DIM) and health risk index (HRI) were estimated...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095310/a-rapid-method-for-harvesting-and-immobilization-of-oleaginous-microalgae-using-pellet-forming-filamentous-fungi-and-the-application-in-phytoremediation-of-secondary-effluent
#16
Sirasit Srinuanpan, Arunothai Chawpraknoi, Supavadee Chantarit, Benjamas Cheirsilp, Poonsuk Prasertsan
A rapid method for harvesting and immobilization of oleaginous microalgae using pellet-forming filamentous fungi was developed. The suitable conditions for pellet formation by filamentous fungi were determined. Among the strains tested, Trichoderma reesei QM 9414 showed superior pellet forming ability. Its pellets were used to harvest oleaginous microalga Scenedesmus sp. With increasing volume ratio of fungal pellets to microalgae culture up to 1:2, >94% of microalgal cells were rapidly harvested within 10 min...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095309/prospect-of-phytoaccumulation-of-arsenic-by-brassica-juncea-l-in-bangladesh
#17
Moupia Rahman, Md Jakariya, Nazmul Haq, Mohammad Amirul Islam
The phytoaccummulation of arsenic by Brassica juncea (L.) was investigated for varying concentrations selected within the range that is evident in Bangladeshi soil. B. juncea (Rai and BARI-11) was grown in the hydroponic media under greenhouse condition with different concentrations (0.5, 1.0, 15, 30, 50 and 100 ppm) of sodium arsenite. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) was used to analyze the data. Mapping of potential area of phytoaccumulation of arsenic by B. juncea was done using Geographic information system (GIS)...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095308/adsorption-of-cationic-dye-from-aqueous-solutions-by-date-pits-equilibrium-kinetic-thermodynamic-studies-and-batch-adsorber-design
#18
R A Mansour, N M Aboeleneen, Nabil M AbdelMonem
The retention profile of methylene blue from aqueous solutions onto the solid adsorbent date pits has been investigated in a batch system. The characterization and adsorption efficiency for methylene blue was evaluated using date pits. Fourier Transform Infra-Red, Scanning Electron Microscope, Brunauer-Emmett-Teller analysis were performed to determine the characteristics of the material. The effect of contact time, initial dye concentration, adsorbent dosage, temperature, and solution pH were investigated...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095307/influence-of-alkyl-polyglucoside-citric-acid-and-nitrilotriacetic-acid-on-phytoremediation-in-pyrene-pb-co-contaminated-soils
#19
Xiaoyan Liu, Liya Cao, Xinying Zhang, Jing Chen, Zhuhao Huo, Ying Mao
At present, the remediation for organic pollutants and heavy metals co-contaminated soils is a challenge which needs to be broken through. In this study, alkyl polyglucoside (APG), citric acid (CA), and nitrilotriacetic acid (NTA) were chosen to enhance the phytoremediation of pyrene and Pb co-contaminated soils by perennial ryegrass. Through the comparison of the results with different applications, it could be found that the application of NTA was beneficial to the growth of perennial ryegrass, the underground and aboveground biomass were increased by 172...
August 24, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/30095306/evaluation-of-spinacia-oleracea-l-for-phytodesalination-and-augmented-production-of-bioactive-metabolite-20-hydroxyecdysone
#20
N S Muchate, N S Rajurkar, P Suprasanna, T D Nikam
In this study, adaptive features of Spinacia oleracea to different levels of salinity, its use in desalination and production of 20-Hydroxyecdysone were studied. Plants showed survival up to EC 12 dS/m with reduced growth as compared with control. Net photosynthesis rate, transpiration, stomatal conductance, and water use efficiency of salt treated plants declines with increasing salinity stress. Higher antioxidant enzyme activities and compatible solutes accumulation were observed in salt treated plants as function of osmotic adjustment...
August 24, 2018: International Journal of Phytoremediation
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