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Vladica Čudić, Dragoslava Stojiljković, Aleksandar Jovović
Phytoremediation is an emerging technology that employs higher plants to cleanup contaminated environments, including metal-polluted soils. Because it produces a biomass rich in extracted toxic metals, further treatment of this biomass is necessary. The aim of our study was to assess the five-year potential of the following native wild plants to produce biomass and remove heavy metals from a polluted site: poplar (Populus ssp.), ailanthus (Ailanthus glandulosa L.), false acacia (Robinia pseudoacacia L.), ragweed (Artemisia artemisiifolia L...
September 1, 2016: Arhiv za Higijenu Rada i Toksikologiju
Qing Fang, Zhengqiu Fan, Yujing Xie, Xiangrong Wang, Kun Li, Yafeng Liu
The quest for new, promising and indigenous plant growth-promoting rhizobacteria and a deeper understanding of their relationship with plants are important considerations in the improvement of phytoremediation. This study focuses on the screening of plant beneficial Cu/Zn-resistant strains and assessment of their bioremediation potential (metal solubilization/tolerance/biosorption and effects on growth of Brassica napus seedlings) to identify suitable rhizobacteria and examine their roles in microbes-assisted phytoremediation...
2016: Frontiers in Plant Science
Xu Wang, Can Chen, Jianlong Wang
Cs accumulation characteristics by S. bicolor were investigated in hydroponic system (Cs level at 50∼1000 μmol/L) and in soil (Cs-spiked concentration was 100 and 400 mg/kg soil). Two varieties of S. bicolor Cowly and Nengsi 2# grown on pot soil during the entire growth period (100 days) did not show significant differences on the height, dry weight (DW) and Cs accumulation. S. bicolor showed the potential phytoextraction ability for Cs-contaminated soil with the bioaccumulation factor (BCF) and the translocation factor (TF) values usually higher than 1 in soil system and in hydroponic system...
October 14, 2016: International Journal of Phytoremediation
G Dąbrowska, K Hrynkiewicz, A Trejgell, C Baum
The test strains Bacteroidetes bacterium (Ba), Pseudomonas fluorescens (Pf) and Variovorax sp. (Va) were selected in advance for their in vitro capability for growth promotion of rapeseed in the presence of increased concentrations of Cd, Cu, Pb and Zn in the medium. In the pot experiment the strains were used for single Ba, Pf, Va or combined Ba+Pf, Ba+Va, Pf+Va, Ba+Pf+Va inoculation of B. napus growing in contaminated soil from alluvial deposits. The positive effect of bacterial strains on plant growth was observed in vitro, but was not confirmed in situ in the contaminated soil, where the tested strains inhibited biomass production, rather than stimulating it...
October 14, 2016: International Journal of Phytoremediation
Dorine Bouquet, Armelle Braud, Thierry Lebeau
Urban garden soils are a potential repository of heavy metal pollution, resulting from either anthropogenic or geogenic origin. The efficiency of phytoextraction was compared on two garden soils with the same texture and topsoil Pb concentration (170 mg kg(-1)) but not the same origin: one geogenic, the other anthropogenic. Two varieties of Brassica juncea were tested with citric acid (25 mmol kg(-1)) or Ethylene Diamine Tetraacetic Acid (EDTA, 2.5 mmol kg(-1)). Geogenic Pb was shown to be two times less available than anthropogenic Pb, with as a result the phytoextraction efficiency being reduced by 59%...
October 14, 2016: International Journal of Phytoremediation
Zhugui Wen, Liang Shi, Yangze Tang, Zhenguo Shen, Yan Xia, Yahua Chen
We used Pisolithus tinctorius and Cenococcum geophilum to determine the copper (Cu) resistance of ectomycorrhizal (ECM) fungi and their potential for improving phytoremediation of Cu-contaminated soil by Chinese red pine (Pinus tabulaeformis). The results showed that nutrient accumulation in C. geophilum mycelium was significantly lower under higher Cu concentrations in the soil, which was not observed in P. tinctorius. Meanwhile, P. tinctorius exhibited greater Cu tolerance than C. geophilum. Inoculation with ECM fungi significantly improved the growth of pine shoots planted in polluted soil in pot experiments (p < 0...
October 14, 2016: International Journal of Phytoremediation
Yanan Shi, Huarong Xie, Lixiang Cao, Renduo Zhang, Zaichao Xu, Zhuoya Wang, Zujun Deng
Metal-resistant endophytic fungi from roots improved phytoremediation efficacy of host plants; however, the effects of endophytic fungi from plant aerial parts on host plants are unknown. The aim of this study was to develop a feasible method to screen fungal endophytes from stems and roots of Brassica napus and to investigate effects of the endophytic fungi on growth and phytoremediation efficiency of the plant. Endophytic Fusarium sp. CBRF44, Penicillium sp. CBRF65, and Alternaria sp. CBSF68 with different traits were isolated from roots and stems of rapes grown in a metal-contaminated soil...
October 10, 2016: Environmental Science and Pollution Research International
N Fiorentino, V Ventorino, C Rocco, V Cenvinzo, D Agrelli, L Gioia, I Di Mola, P Adamo, O Pepe, M Fagnano
Phytoremediation is a cost-effective "green technology" that uses plants to improve the soil properties of polluted sites, preventing the dispersion of pollutants and reducing the mobility of potentially toxic elements (PTEs) through their adsorption and accumulation by roots or precipitation within the root zone. Being highly tolerant to pollutants and other abiotic stresses, giant reed (Arundo donax L.) is a suitable biomass crop for phytoremediation of contaminated soils. We report the results of a two-year open-air lysimeter study aimed at assessing the adaptability of giant reed to grow on industrial substrates polluted by Pb and Zn and at testing commercial humic acids from leonardite as improvers of plant performance...
October 6, 2016: Science of the Total Environment
Xiaoming Wan, Mei Lei, Tongbin Chen, Jie Ma
Arsenic (As) contamination and its harmful consequences have gained increasing attention in research. Phytoextraction, which uses the As hyperaccumulator Pteris vittata L., is a well-established technology adopted in many countries. However, the hyperaccumulation mechanisms of this plant remain controversial. This study investigated the species and the micro-distribution of As species in three P. vittata L. ecotypes after exposure to arsenite (AsIII) and arsenate (AsV) for 7d. Arsenic-accumulating abilities and preferences to As species varied among different ecotypes...
January 2017: Chemosphere
Tingting Ma, Liqiang Zhou, Li 'ke Chen, Zhu Li, Longhua Wu, Peter Christie, Yongming Luo
Excessive use of antibiotics potentially threatens human health, agricultural production and soil phytoremediation. This arouses concern over the potential adverse effects of a commonly used antibiotic, oxytetracycline (OTC), on plants used for soil remediation and possible stimulation of antibiotic resistance genes in soils. A greenhouse experiment was conducted to investigate different rates (0, 1, 5, and 25 mg kg-1) and frequencies (one single high and daily low application) of OTC addition to soil on phytoremediation of a heavy metal contaminated soil by Sedum plumbizincicola and/or Medicago sativa (alfalfa)...
October 5, 2016: Journal of Agricultural and Food Chemistry
Helga Kovacs, Katalin Szemmelveisz
Reducing or preventing damage caused by environmental pollution is a significant goal nowadays. Phytoextraction, as remediation technique is widely used, but during the process, the heavy metal content of the biomass grown on these sites special treatment and disposal techniques are required, for example liquid extraction, direct disposal, composting, and combustion. These processes are discussed in this review in economical and environmental aspects. The following main properties are analyzed: form and harmful element content of remains, utilization of the main and byproducts, affect to the environment during the treatment and disposal...
January 2017: Chemosphere
Luis Rodríguez, Jacinto Alonso-Azcárate, José Villaseñor, Laura Rodríguez-Castellanos
The efficiency of white lupine (Lupinus albus) to uptake and accumulate mercury from a soil polluted by mining activities was assessed in a pot experiment with chemically assisted phytoextraction. The mobilizing agents tested were ethylenediaminetetracetic acid (EDTA) and hydrochloric acid (HCl). Two doses of each amendment were used (0.5 and 1.0 g of amendment per kg of soil), and unamended pots were used as a control. Addition of HCl to the soil did not negatively affect plant biomass, while the use of EDTA led to a significant decrease in plant growth when compared to that found for non-treated pots, with plants visually showing symptoms of toxicity...
September 22, 2016: Environmental Science and Pollution Research International
Mir Md Abdus Salam, Erik Kaipiainen, Muhammad Mohsin, Aki Villa, Suvi Kuittinen, Pertti Pulkkinen, Paavo Pelkonen, Lauri Mehtätalo, Ari Pappinen
Salix schwerinii was tested in a pot experiment to assess plant growth performance i.e., relative height and dry biomass and the potential for heavy metal uptake in soils polluted with chromium, zinc, copper, nickel and total petroleum hydrocarbons. The soil used in the pot experiment was collected from a landfill area in Finland. Peat soil was added at different quantities to the polluted soil to stimulate plant growth. The plants were irrigated with tap water or processed water (municipal waste water) to further investigate the effects of nutrient loading on plant biomass growth...
December 1, 2016: Journal of Environmental Management
Amanullah Mahar, Ping Wang, Amjad Ali, Zhanyu Guo, Mukesh Kumar Awasthi, Altaf Hussain Lahori, Quan Wang, Feng Shen, Ronghua Li, Zengqiang Zhang
Soil heavy metals pollution is a serious problem worldwide due to its potential human health risks through food chain. Therefore, a sustainable solution is needed to efficiently remediate HMs contaminated soils. Our study aimed to assess the impact of CaO, fly ash, sulfur, and Na2S on the immobilization of Cd, Cu, and Pb and their uptake by Chinese cabbage (Brassica rapa chinensis) in a contaminated soil. The concentration of DTPA-extractable Cd, Cu, and Pb was significantly decreased as compared to control in treated soil...
September 6, 2016: Ecotoxicology and Environmental Safety
Jacek Antonkiewicz, Barbara Kołodziej, Elżbieta Jolanta Bielińska
The aim of the study was to evaluate the efficacy of the multiflora rose var. 'Jatar' (Rosa multiflora Thunb. ex Mur) and the Virginia fanpetals (Sida hermaphrodita Rusby) to phytoextract heavy metals from municipal sewage sludge. The 6-year field experiment involved four levels of fertilization with sewage sludge at doses of 0, 10, 20, 40, and 60 Mg DM sludge · ha(-1). The increasing doses of sewage sludge were found to increase significantly the yield of multiflora rose and Virginia fanpetals biomass. They also significantly elevated the content of heavy metals in these plants...
September 7, 2016: International Journal of Phytoremediation
Jing He, Lijin Lin, Qianqian Ma, Ming'an Liao, Xun Wang, Yunsong Lai, Dong Liang, Hui Xia, Yi Tang, Jin Wang, Li Wang
The effects of uniconazole (S-3307) appliation on the growth and cadmium (Cd) accumulation of accumulator plant Malachium aquaticum (L.) Fries. were studied through a pot experiment. The application of S-3307 increased the biomass and photosynthetic pigment content of M. aquaticum under Cd-contaminated soil, and also improved the SOD and POD activities in M. aquaticum. Applying S-3307 increased Cd content in shoots and decreased Cd content in roots of M. aquaticum, but the translocation factor (TF) of M. aquaticum increased with the increase of S-3307 concentration...
September 3, 2016: International Journal of Phytoremediation
Nicholson N Jeke, Adenike O Hassan, Francis Zvomuya
Land spreading of biosolids as a disposal option is expensive and can disperse pathogens and contaminants in the environment. This growth room study examined phytoremediation using switchgrass (Panicum virgatum) and cattail (Typha latifolia) as an alternative to land spreading of biosolids. Seedlings were transplanted into pots containing 3.9 kg of biosolids (dry wt.). Aboveground biomass (AGB) was harvested either once or twice during each 90-d growth period. Switchgrass AGB yield was greater with two harvests than with one harvest during the first 90-d growth period, whereas cattail yield was not affected by harvest frequency...
September 3, 2016: International Journal of Phytoremediation
Wafa Atma, Mohammed Larouci, Boumedienne Meddah, Khéloufi Benabdeli, Pascal Sonnet
This study investigates the accumulation and distribution of Nickel in Arundo donax L. parts to assess potential use in phytoremediation of Ni contaminated soils. The effect of EDTA and nutrient solution NPK was probed. A 35 days pot experiment was held in the laboratory and the pots were irrigated with Ni contaminated solution combined or not with EDTA and NPK. The growth of plants was evaluated at the end of the experiment. The accumulation was analysed by AAS. The Obtained results indicate that plant was able to survive with high Ni content...
September 3, 2016: International Journal of Phytoremediation
Gangrong Shi, Shenglan Xia, Caifeng Liu, Zheng Zhang
This study investigated the cadmium (Cd) accumulation and growth response to Cd stress of 18 plant species. After growth for 30 days in the sand containing 0, 2, or 10 mg Cd kg(-1), seedlings were evaluated for growth parameters, specific root length, and Cd accumulation. The 18 species differ greatly in Cd accumulation and resistance to Cd stress, depending on Cd concentrations in the sand. Under high Cd condition (10 mg kg(-1)), the 18 species were classified into two groups: (1) Indian mustard and rapeseed having high Cd tolerance and increased accumulation capacity in shoots could be considered as Cd accumulators, and (2) the remaining 16 non-accumulators constitute a species continuum from the indicators to excluders...
September 1, 2016: Environmental Science and Pollution Research International
Kateřina Břendová, Veronika Zemanová, Daniela Pavlíková, Pavel Tlustoš
In the present study, the content of risk elements and content of free amino acids were studied in spinach (Spinacia oleracea L.) and mustard (Sinapis alba L.) subsequently grown on uncontaminated and contaminated soils (5 mg Cd/kg, 1000 mg Pb/kg and 400 mg Zn/kg) with the addition of activated carbon (from coconut shells) or biochar (derived from local wood residues planted for phytoextaction) in different seasons (spring, summer and autumn). The results showed that activated carbon and biochar increased biomass production on contaminated site...
October 1, 2016: Journal of Environmental Management
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