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phytoremediation

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https://www.readbyqxmd.com/read/28628983/immobilized-oleaginous-microalgae-for-production-of-lipid-and-phytoremediation-of-secondary-effluent-from-palm-oil-mill-in-fluidized-bed-photobioreactor
#1
Benjamas Cheirsilp, Tipawan Thawechai, Poonsuk Prasertsan
Oleaginous microalga Nannochloropsis sp. was immobilized in alginate gel beads and cultivated under optimal conditions that their growth and lipid production were comparable to those of free cells. The immobilized cells were used in phytoremediation of secondary effluent from palm oil mill and easily recovered by simple sieving method. The immobilized cells contributed to removal of nitrogen and phosphorus >90% and CO2 mitigation >99%. They also gave the biomass and lipid production of 1.300±0.050g/L and 0...
June 14, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28628902/recycling-stabilised-solidified-drill-cuttings-for-forage-production-in-acidic-soils
#2
Reginald B Kogbara, Bernard B Dumkhana, Josiah M Ayotamuno, Reuben N Okparanma
Stabilisation/solidification (S/S), which involves fixation and immobilisation of contaminants using cementitious materials, is one method of treating drill cuttings before final fate. This work considers reuse of stabilised/solidified drill cuttings for forage production in acidic soils. It sought to improve the sustainability of S/S technique through supplementation with the phytoremediation potential of plants, eliminate the need for landfill disposal and reduce soil acidity for better plant growth. Drill cuttings with an initial total petroleum hydrocarbon (TPH) concentration of 17,125 mg kg(-1) and low concentrations of metals were treated with 5%, 10%, and 20% cement dosages...
June 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28624942/toxicity-of-56-substances-to-trees
#3
Lauge Peter Westergaard Clausen, Stefan Trapp
Toxicity data of substances to higher plants is needed for the purpose of risk assessment, site evaluation, phytoremediation, and plant protection. However, the results from the most common phytotoxicity tests, like the OECD algae and Lemna test, are not necessarily valid for higher terrestrial plants. The willow tree toxicity test uses inhibition of transpiration (aside of growth and water use efficiency) of willow cuttings grown in spiked solutions or soils as end point to quantify toxicity. This overview presents results from 60 studies including 24 new unpublished experiments for 56 different chemicals or substrates...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624590/maleic-acid-assisted-improvement-of-metal-chelation-and-antioxidant-metabolism-confers-chromium-tolerance-in-brassica-juncea-l
#4
Jubayer Al Mahmud, Mirza Hasanuzzaman, Kamrun Nahar, Anisur Rahman, Md Shahadat Hossain, Masayuki Fujita
Chromium (Cr) is a highly toxic environmental pollutant that negatively affects plant growth and development. Thus, remediating Cr from soil or increasing plant tolerance against Cr stress is urgent. Organic acids are recognized as agents of phytoremediation and as exogenous protectants, but using maleic acid (MA) to attain these results has not yet been studied. Therefore, our study investigated the effects of MA on Cr uptake and mitigation of Cr toxicity. We treated 8-d-old Indian mustard (Brassica juncea L...
June 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28624459/overexpression-of-a-bacterial-mercury-transporter-mert-in-arabidopsis-enhances-mercury-tolerance
#5
Sheng Xu, Bin Sun, Rong Wang, Jia He, Bing Xia, Yong Xue, Ren Wang
The phytoremediation by using of green plants in the removal of environmental pollutant is an environment friendly, green technology that is cost effective and energetically inexpensive. By using Agrobacterium-mediated gene transfer, we generated transgenic Arabidopsis plants ectopically expressing mercuric transport protein gene (merT) from Pseudomonas alcaligenes. Compared with wild-type (WT) plants, overexpressing PamerT in Arabidopsis enhanced the tolerance to HgCl2. Further results showed that enhanced total activities or corresponding transcripts of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (POD) were observed in transgenic Arabidopsis under HgCl2 stress...
June 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28623832/a-review-on-in-situ-phytoremediation-of-mine-tailings
#6
REVIEW
Li Wang, Bin Ji, Yuehua Hu, Runqing Liu, Wei Sun
Mine tailings are detrimental to natural plant growth due to their physicochemical characteristics, such as high pH, high salinity, low water retention capacity, high heavy metal concentrations, and deficiencies in soil organic matter and fertility. Thus, the remediation of mine tailings has become a key issue in environmental science and engineering. Phytoremediation, an in situ cost-effective technology, is emerging as the most promising remediation method for mine tailings by introducing tolerant plant species...
June 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28623746/electrokinetic-enhanced-ryegrass-cultures-in-soils-polluted-with-organic-and-inorganic-compounds
#7
Gustavo Acosta-Santoyo, Claudio Cameselle, Erika Bustos
The effect of electric fields on seed germination and development of ryegrass (Lolium perenne L.) was studied in clean and contaminated soil with heavy metals and/or PAHs. The application of 0.2 DCV/cm in clean soil near ryegrass seeds enhanced the germination by 75%. The presence of contaminants in soil hindered the germination and growing of ryegrass. However, the application of DC electric field favored the germination and growing of plants compensating the negative effects of the contaminants. The electrode material in anodes has a decisive influence in the germination and growing of ryegrass...
June 14, 2017: Environmental Research
https://www.readbyqxmd.com/read/28618276/common-explosives-tnt-rdx-hmx-and-their-fate-in-the-environment-emphasizing-bioremediation
#8
REVIEW
Soumya Chatterjee, Utsab Deb, Sibnarayan Datta, Clemens Walther, Dharmendra K Gupta
Explosive materials are energetic substances, when released into the environment, contaminate by posing toxic hazards to environment and biota. Throughout the world, soils are contaminated by such contaminants either due to manufacturing operations, military activities, conflicts of different levels, open burning/open detonation (OB/OD), dumping of munitions etc. Among different forms of chemical explosives, 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro- 1,3,5,7-tetrazocine (HMX) are most common...
June 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28614741/iopromide-exposure-in-typha-latifolia-l-evaluation-of-uptake-translocation-and-different-transformation-mechanisms-in-planta
#9
Hao Cui, Martin Hrabě de Angelis, Peter Schröder
Iopromide is frequently detected in water bodies due to its widespread use as an X-ray contrast agent in medicine. Due to its rapid clearance from the human body and its incomplete removal by wastewater treatment, an elevation of its concentration in the environment is observed that might lead to a serious impact on human and environmental health. Alternative or additional removal technologies may be more effective to remove iopromide from the effluents of wastewater treatment facilities, like phytoremediation with aquatic macrophytes...
June 4, 2017: Water Research
https://www.readbyqxmd.com/read/28613914/effect-of-rhizobacteria-on-arsenic-uptake-by-macrophyte-eichhornia-crassipes-mart-solms
#10
Parvinder Kaur, Simranjeet Singh, Vivek Kumar, Nasib Singh, Joginder Singh
Wastewater from municipal systems and industrial processes carries several trace metals including metalloid arsenic (As) which are considered serious environmental contaminants due to toxicity, and recalcitrant nature. In this study, we determined the phytoremediation of As by Eichhornia crassipes (Mart.) Solms either alone or in association with plant growth promoting rhizobacteria. Pseudomonas and Azotobacter inoculation to E. crassipes resulted in enhanced As removal compared to uninoculated control. Co-inoculation with a consortium of Pseudomonas, Azotobacter, Azospirillum, Actinomyces and Bacillus resulted in higher As (p<0...
June 14, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28613080/wetland-based-phytoremediation-of-biosolids-from-an-end-of-life-municipal-lagoon-a-microcosm-study
#11
Inoka Amarakoon, Adenike O Hassan, Francis Zvomuya
This study examined the effectiveness of a wetland system for phytoremediation of biosolids from an end-of-life municipal lagoon. The microcosm experiment tested the effects of one vs. two harvests of cattail per growth cycle in biosolids without (PB) or with (PBS) the addition of soil on phytoremediation. Cattail (Typha latifolia)) seedlings were transplanted into pots containing 4.5 kg (dry wt.) of biosolids, above which a 10-cm deep water column was maintained. Results showed that two harvests per growth cycle significantly increased N and P phytoextraction relative to a single harvest...
June 14, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28613079/rhizoremediation-of-residual-sulfonylurea-herbicides-in-agricultural-soils-using-lens-culinaris-and-a-commercial-supplement
#12
B Rainbird, R H Bentham, K L Soole
Sulfonylureas are a popular herbicide used today for controlling weeds. While beneficial for this purpose they present a persistent problem in agricultural treated areas proving detrimental for successive crops. This study assessed the phytoremediative properties of lentils (Lens culinaris) grown in uncontaminated and Chlorsulfuron-contaminated soil, with and without the addition of a growth supplement, PulseAider™. The results show that in the presence of lentils the degradation of Chlorsulfuron is enhanced and this degradation rate is significantly increased when the PulseAider™ supplement was included during seed sowing...
June 14, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28611799/endophytic-paecilomyces-formosus-lhl10-augments-glycine-max-l-adaptation-to-ni-contamination-through-affecting-endogenous-phytohormones-and-oxidative-stress
#13
Saqib Bilal, Abdul L Khan, Raheem Shahzad, Sajjad Asaf, Sang-Mo Kang, In-Jung Lee
This study investigated the Ni-removal efficiency of phytohormone-producing endophytic fungi Penicillium janthinellum, Paecilomyces formosus, Exophiala sp., and Preussia sp. Among four different endophytes, P. formosus LHL10 was able to tolerate up to 1 mM Ni in contaminated media as compared to copper and cadmium. P. formosus LHL10 was further assessed for its potential to enhance the phytoremediation of Glycine max (soybean) in response to dose-dependent increases in soil Ni (0.5, 1.0, and 5.0 mM). Inoculation with P...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28609852/engaging-with-residents-perceived-risks-and-benefits-about-technologies-as-a-way-of-resolving-remediation-dilemmas
#14
Jason Prior, Tapan Rai
In recent decades the diversity of remediation technologies has increased significantly, with the breadth of technologies ranging from dig and dump to emergent technologies like phytoremediation and nanoremediation. The benefits of these technologies to the environment and human health are believed to be substantial. However, they also potentially constitute risks. Whilst there is a growing body of knowledge about the risks and benefits of these technologies from the perspective of experts, little is known about how residents perceive the risks and benefits of the application of these technologies to address contaminants in their local environment...
June 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28609737/enantioselective-uptake-translocation-and-degradation-of-the-chiral-pesticides-tebuconazole-and-imazalil-by-phragmites-australis
#15
Tao Lv, Pedro N Carvalho, Mònica Escolà Casas, Ulla E Bollmann, Carlos A Arias, Hans Brix, Kai Bester
Phytoremediation of realistic environmental concentrations (10 μg L(-1)) of the chiral pesticides tebuconazole and imazalil by Phragmites australis was investigated. This study focussed on removal dynamics, enantioselective mechanisms and transformation products (TPs) in both hydroponic growth solutions and plant tissues. For the first time, we documented uptake, translocation and metabolisation of these pesticides inside wetland plants, using enantioselective analysis. Tebuconazole and imazalil removal efficiencies from water reached 96...
June 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28605844/combination-of-aquatic-species-and-safeners-improves-the-remediation-of-copper-polluted-water
#16
Ivan Panfili, Maria Luce Bartucca, Eleonora Ballerini, Daniele Del Buono
In the last decades, many anthropogenic activities have resulted in heavy metal contamination of freshwaters and surrounding environments. This poses serious threats to human health. Phytoremediation is a cost-effective technology which is useful for remediating polluted soils and water. Recently, the use of aquatic free-floating plants has been proposed to remediate polluted water. In this context, a study on the capacity of two aquatic plants, Lemna minor (duckweed) and Salvinia auriculata (salvinia), to remediate Cu(+2) (Cu) polluted water was carried out...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28598217/influence-of-biochar-and-compost-on-phytoremediation-of-oil-contaminated-soil
#17
Lindsey Saum, Macario Bacilio Jiménez, David Crowley
The use of pyrolyzed carbon, biochar, as a soil amendment is of potential interest for improving phytoremediation of soil that has been contaminated by petroleum hydrocarbons. To examine this question, research reported here compared the effects of biochar, plants (mesquite tree seedlings), compost and combinations of these treatments on the rate of biodegradation of oil in a contaminated soil and the population size of oil degrading bacteria. The presence of mesquite plants significantly enhanced oil degradation in all treatments except when biochar was used as the sole amendment without compost...
June 9, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28598215/enhanced-atrazine-removal-by-hydrophyte-bacterium-associations-and-in-vitro-screening-of-the-isolates-for-their-plant-growth-promoting-potential
#18
Anina James, D K Singh, P J Khankhane
Emergent hydrophytes Acorus calamus, Typha latifolia and Phragmites karka and epiphytic root bacteria isolated from their rhizoplanes were exposed to atrazine (5 mg l(-1) and 10 mg l(-1)) individually and in plant‒bacterium combination for 15 days hydroponically. It was observed that A. calamus‒Pseudomonas sp. strain ACB combination was best in decontamination, showing 91% and 87% removal of 5 mg l(-1) and 10 mg l(-1) atrazine. Plant‒bacterium association led to significant increase in atrazine decontamination as compared to decontamination by either plant or bacterium alone indicating synergistic action of the hydrophytes and isolates which led to enhanced atrazine removal...
June 9, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28598213/characterization-and-degradation-potential-of-diesel-degrading-bacterial-strains-for-application-in-bioremediation
#19
María Balseiro-Romero, Panagiotis Gkorezis, Petra S Kidd, Jonathan Van Hamme, Nele Weyens, Carmen Monterroso, Jaco Vangronsveld
Bioremediation of polluted soils is a promising technique with low environmental impact, which uses soil organisms to degrade soil contaminants. In this study, 19 bacterial strains isolated from a diesel-contaminated soil were screened for diesel-degrading potential, biosurfactant production, and biofilm formation abilities, all desirable characteristics when selecting strains for re-inoculation into hydrocarbon-contaminated soils. Diesel degradation rates were determined in vitro in minimal medium with diesel as the sole carbon source...
June 9, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28598199/phytoremediation-of-domestic-wastewater-using-a-hybrid-constructed-wetlands-in-mountainous-rural-area
#20
Saloua Elfanssi, Naaila Ouazzani, Lahbib Latrach, Abdessamed Hejjaj, Laila Mandi
The purpose of this study is to evaluate the efficiency of a hybrid constructed wetlands (HCW) in a rural mountainous area. The experiment was set up in small rural community named Tidili within the region of Marrakech-Morocco. The wastewater treatment plant was composed of three vertical flow constructed wetlands (VFCWs) working in parallel, followed by two parallel horizontal-subsurface flow constructed wetlands (HFCWs), with hydraulic loading rate of 0.5 m(3)/ m(2).d and 0.75 m(3)/m(2).d, respectively...
June 9, 2017: International Journal of Phytoremediation
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