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Nongnuch Wiangkham, Benjaphorn Prapagdee
This work mainly aims to explore the potential of synergistic use of cadmium-resistant bacteria and Napier grass to promote cadmium phytoremediation and the possibility of using the harvested Napier grass for biomass fuel. A pot experiment was carried out by transplanting Napier grass with and without bacterial inoculation in cadmium contaminated soil for 6 months. The results found that Micrococcus sp. significantly promoted the shoot biomass of Napier grass but not the root biomass. Micrococcus sp. and Arthrobacter sp...
March 6, 2018: Chemosphere
S Mykolenko, V Liedienov, M Kharytonov, N Makieieva, T Kuliush, I Queralt, E Marguí, M Hidalgo, G Pardini, M Gispert
The work was conducted to establish contamination from improper disposal of hazardous wastes containing lead (Pb) and antimony (Sb) into nearby soils. Besides other elements in the affected area, the biological role of Sb, its behaviour in the pedosphere and uptake by plants and the food chain was considered. Wastes contained 139532 ± 9601 mg kg-1 (≈14%) Pb and 3645 ± 194 mg kg-1 (≈0.4%) Sb respectively and variability was extremely high at a decimetre scale. Dramatically high concentrations were also found for As, Cd, Cu, Mn, Ni, Sn and Zn...
March 7, 2018: Environmental Pollution
Honghua He, Zhigang Dong, Jiayin Pang, Gao-Lin Wu, Jiyong Zheng, Xingchang Zhang
Coal fly ash (CFA) is an industrial waste generated in huge amounts worldwide, and the management of CFA has become an environmental concern. Recovery of valuable metals from CFA is one of the beneficial reuse options of CFA. Rhenium (Re) is one of the rarest metals in the Earth's crust and one of the most expensive metals of strategic significance in the world market. A CFA at the Jungar Thermal Power Plant, Inner Mongolia, China, contains more Re than two alkaline soils in the surrounding region. Pot experiments were undertaken to grow lucerne (Medicago sativa) and erect milkvetch (Astragalus adsurgens) in a loessial soil and an aeolian sandy soil amended with different rates (5%, 10%, 20%, and 40%) of CFA...
February 26, 2018: Science of the Total Environment
Tania Pardo, Beatriz Rodríguez-Garrido, Ramez F Saad, Jose Luis Soto-Vázquez, Mariana Loureiro-Viñas, Ángeles Prieto-Fernández, Guillaume Echevarria, Emil Benizri, Petra S Kidd
Nickel (Ni) agromining of ultramafic soils has been proposed as an eco-friendly option for metal recovery, which can also improve the fertility and quality of these low productive soils. The selection of adequate plant species and the analysis of their performance under the different climatic conditions are of interest for optimising the process and evaluating its full viability. A one-year field experiment was carried out to evaluate the viability of the two Ni-hyperaccumulating Mediterranean species, Alyssum murale and Leptoplax emarginata, for agromining purposes in ultramafic soils under a humid-temperate climate...
February 22, 2018: Science of the Total Environment
Natielo Almeida Santana, Caroline Maria Rabuscke, Valdemir Bittencourt Soares, Hilda Hildebrand Soriani, Fernando Teixeira Nicoloso, Rodrigo Josemar Seminoti Jacques
The phytoremediation of copper (Cu)-contaminated sandy soils can be influenced by the addition of vermicompost to the soil and the mycorrhization of plants. The objective of this study was to evaluate the effects of inoculation with the mycorrhizal fungus Rhizophagus clarus and the addition of different doses of bovine manure vermicompost on the phytoremediation of a sandy soil with a high Cu content using Canavalia ensiformis. Soil contaminated with 100 mg kg-1 Cu received five doses of vermicompost and was cultivated with C...
February 21, 2018: Environmental Science and Pollution Research International
Yu Zhang, Junli Hu, Jianfeng Bai, Junhua Wang, Rui Yin, Jingwei Wang, Xiangui Lin
An 8-week pot experiment was conducted to investigate the growth and responses of sunflower (Helianthus annuus L.) to arbuscular mycorrhizal (AM) fungal inoculations on a heavily heavy metal (HM)-contaminated (H) soil and a lightly HM-enriched (L) soil, both of which were collected from a waste electrical and electronic equipment (WEEE)-recycling site. Compared with the L soil, the H soil induced significantly larger (P<0.05) concentrations of Cd, Cu, Pb, Cr, Zn and Ni in sunflower (except for root Cr and shoot Ni), which impaired the thylakoid lamellar folds in leaves...
February 10, 2018: Science of the Total Environment
Xia Jia, Chunyan Zhang, Yonghua Zhao, Tuo Liu, Yunhua He
Few studies have explored the long-term effects of elevated atmospheric CO2 combined with lead (Pb) contamination on plants. The objective of this study was to examine the effects of 3 years of elevated CO2 (700 ± 23 μmol mol-1) on Pb accumulation and plant defenses in leaves of Robinia pseudoacacia L. seedlings in exposed to Pb (500 mg kg-1 soil). Elevated CO2 increased Pb accumulation in leaves and Pb removal rate in soils. In plants exposed to Pb stress, total chlorophyll and carotenoid contents in leaves were lower under elevated CO2 than under ambient CO2, but seedling height and width increased under elevated CO2 relative to ambient CO2...
February 6, 2018: Journal of Hazardous Materials
Guangxu Zhu, Huayun Xiao, Qingjun Guo, Bo Song, Guodi Zheng, Zhongyi Zhang, Jingjing Zhao, Chukwunonso Peter Okoli
A field investigation on the content of heavy metals in soils and 17 kinds of dominant plants from wasteland of the downstream of a Pb-Zn mine in Northwest Guangxi Zhuang Autonomous Region was carried out. The absorption and accumulation characteristics of heavy metals between plants and soil were compared, and the candidate species for ecosystem restoration of the area were selected. The results indicated that the soils had been subjected to pollution of heavy metals in varying degrees. The concentrations of Cd, Pb, Zn were 46...
February 1, 2018: Ecotoxicology and Environmental Safety
Vivek Rana, Subodh Kumar Maiti
Opencast bituminous coal mining invariably generates huge amount of metal-polluted waste rocks (stored as overburden (OB) dumps) and reclaimed by planting fast growing hardy tree species which accumulate metals in their tissues. In the present study, reclaimed OB dumps located in Jharia coal field (Jharkhand, India) were selected to assess the accumulation of selected metals (Pb, Zn, Mn, Cu and Co) in tissues (leaf, stem bark, stem wood, root bark and root wood) of two commonly planted tree species (Acacia auriculiformis A...
January 24, 2018: Environmental Science and Pollution Research International
Nicole C Smith, Sherri L Christian, Richard G Taylor, Javier Santander, Matthew L Rise
The innate immune system provides the first barrier to infection and disease through various processes including activation of inflammation. Inflammation is a biological process whereby immune cells, including macrophages, respond to, and work together to eliminate, damage from injury and disease. Chronic or sustained inflammation, however, can be detrimental to the health and growth of animals, including fish. Immune modulating functional plant compounds, supplemented as feed additives, may be safe and natural approaches to controlling inflammation and disease...
January 19, 2018: Molecular Immunology
Werther Guidi Nissim, Emily Palm, Stefano Mancuso, Elisa Azzarello
The current field study aims to assess the suitability of four different plant species (i.e. poplar, willow, hemp and alfalfa) to be used for trace element (TE) (i.e. Cd, Cu, Ni, Pb and Zn) phytoextraction under hot-arid Mediterranean climate conditions. Plants were grown for two consecutive years on a moderate TE contaminated soil, supplied with water and mineral nutrients. The growth and physiological parameters were assessed throughout the trial to compare the response of plants to the environmental pollution, and TE uptake rates were measured for aboveground plant tissues...
January 16, 2018: Environmental Science and Pollution Research International
Reza Hesami, Azam Salimi, Seyed Majid Ghaderian
In the current study, soils of Tang-e Douzan mine, located in Isfahan, Iran, were collected and analyzed for soluble, exchangeable, and total amounts of Pb, Zn, Cd, Ca, and Mg. The maximum Pb, Zn, Cd, Ca, and Mg concentrations in soils were 2500, 1100, 59, 43,800, and 1320 mg/kg for total metals, 86, 83, 6.3, 4650, and 48 mg/kg for their exchangeable fractions, and 59, 3.7, 0.53, 430, and 6.4 mg/kg for their soluble fractions, respectively. All specimens collected, including 69 plant species, were analyzed for Pb, Zn, and Cd...
January 10, 2018: Environmental Science and Pollution Research International
Xin Yao, Fengfeng Ma, Youzhi Li, Xiaohui Ding, Dongsheng Zou, Yandong Niu, Hualin Bian, Jiajun Deng
The growth performance of Salix triandroides cuttings at three water cadmium (Cd) concentrations (0, 20, and 40 mg L-1) and three water levels (- 40 cm, water level 40 cm below the soil surface; 0 cm, water level even with the soil surface; and 40 cm, water level 40 cm above soil surface) was investigated to evaluate its potential in phytoextraction strategies. Compared to cuttings in the - 40 or 0 cm water levels, cuttings in the 40 cm water level showed significantly lower biomass, height, and adventitious root length and significantly fewer leaves and adventitious roots...
January 5, 2018: Environmental Science and Pollution Research International
Yohan Liber, Clarisse Létondor, Sophie Pascal-Lorber, François Laurent
Because of its high persistence in soils, t1/2=30years, chlordecone (CLD) was classified as a persistent organic pollutant (POP) by the Stockholm Convention in 2009.The distribution of CLD over time has been heterogeneous, ranging from banana plantations to watersheds, and contaminating all environmental compartments. The aims of this study were to (i) evaluate the potential of Miscanthus species to extract chlordecone from contaminated soils, (ii) identify the growth parameters that influence the transfer of CLD from the soil to aboveground plant parts...
December 20, 2017: Science of the Total Environment
Aniqa Aziz, Nudrat Aisha Akram, Muhammad Ashraf
Phytoextracts are being widely used these days as a source of bioactive compounds for mitigating the harmful effects of abiotic stresses including drought stress. In this study, it was assessed how far foliar applied pure synthetic ascorbic acid (AsA) or natural sweet orange juice (OJ) enriched with AsA could mitigate the drought stress induced adverse effects on growth and some key metabolic processes in quinoa (Chenopodium quinoa Willd.; cultivar V9) plants. Two weeks old quinoa seedlings were subjected to varying irrigation regimes as control [100% field capacity (FC)] and drought stress (60% FC, 40% FC and 20% FC)...
December 5, 2017: Plant Physiology and Biochemistry: PPB
Daihua Ye, Tingxuan Li, Xizhou Zhang, Zicheng Zheng
Polygonum hydropiper is a dominant plant species in Shifang phosphorus (P) mine area and is a promising P-accumulator used for P-phytoextraction. To date, little information is available on the physiological response involved in alleviating P toxicity of P. hydropiper under high P. A pot experiment was carried out to investigate growth, P subcellular distribution, chemical forms in two ecotypes of P. hydropiper under high levels (1, 4, and 8 mmol P L-1) of inorganic P (Pi) and organic P (Po), supplied as KH2PO4 and myo-inositol hexaphosphoric acid dodecasodium salt, respectively...
December 6, 2017: Chemosphere
Zhu Li, Longhua Wu, Yongming Luo, Peter Christie
Phytoextraction is one of the most promising technologies for the decontamination of metal-polluted agricultural soils. Effects of repeated phytoextraction by the cadmium (Cd)/zinc (Zn) hyperaccumulator Sedum plumbizincicola on metal (Cd, Zn, copper (Cu) and lead (Pb)) mobility were investigated in three contaminated soils with contrasting properties. EDTA kinetic extraction and the two first-order reactions model showed advantages in the assessment of soil metal mobility and clearly discriminated changes in metal fractions induced by phytoextraction...
March 2018: Chemosphere
Munir Ahmad, Adel R A Usman, Abdullah S Al-Faraj, Mahtab Ahmad, Abdelazeem Sallam, Mohammad I Al-Wabel
Biochar (BC) was produced by pyrolyzing the date palm leaf waste at 600 °C and then loaded with phosphorus (P) via sorption process. Greenhouse pot experiment was conducted to investigate the application effects of BC and P-loaded biochar (BCP) on growth and availability of P and heavy metals to maize (Zea mays L.) plants grown in contaminated mining soil. The treatments consisted of BC and BCP (at application rates of 5, 10, 20, and 30 g kg-1 of soil), recommended NK and NPK, and a control (no amendment)...
March 2018: Chemosphere
Vibha Sinha, Kannan Pakshirajan, Rakhi Chaturvedi
In the current industrial scenario, chromium (Cr) as a metal is of great importance, but poses a major threat to the environment. Phytoremediation provides an environmentally sustainable, ecofriendly, cost effective approach for environmental cleanup of Cr. This review presents the current status of phytoremediation research with particular emphasis on cleanup of Cr contaminated soil and water systems. It gives a detailed account of the work done by different authors on the Cr bioavailability, uptake pathway, toxicity and storage in plants following the phytoextraction mechanism...
November 17, 2017: Journal of Environmental Management
Dávid Tőzsér, Sándor Harangi, Edina Baranyai, Gyula Lakatos, Zoltán Fülöp, Béla Tóthmérész, Edina Simon
We tested the suitability of Salix viminalis for phytoextraction with the analysis of selected elements in soil, root, and leaf, and by visual tree condition assessment in an area with varying levels of contamination. Bioconcentration factor (BCF) and translocation factor (TF) were used to assess the phytoextraction potential of willows. The middle part of the study area was strongly contaminated, while the northern and southern parts were moderately contaminated. We found increasing element concentrations toward deeper layers...
November 16, 2017: Environmental Science and Pollution Research International
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