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https://www.readbyqxmd.com/read/28633064/an-innovative-approach-to-bioremediation-of-mercury-contaminated-soils-from-industrial-mining-operations
#1
Damien McCarthy, Grant C Edwards, Mae S Gustin, Andrew Care, Matthieu B Miller, Anwar Sunna
Soils contaminated with mercury (Hg) have proved expensive and logistically difficult to remediate. Research continues into finding suitable environmentally-friendly and efficient ways of achieving this end. Bioremediation is an option, which employs the strategies microorganisms have evolved to deal with Hg. One microbial strategy involves uptake and intracellular volatilisation of mercuric ions, which passively diffuse from the cell and back into the atmosphere. In this work, Pseudomonas veronii cells grown to stationary phase were immobilised in a xanthan gum-based biopolymer via encapsulation...
June 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28629105/indispensable-role-of-biochar-inherent-mineral-constituents-in-its-environmental-applications-a-review
#2
Xiaoyun Xu, Yinghao Zhao, Jingke Sima, Ling Zhao, Ondřej Mašek, Xinde Cao
Biochar typically consists of both carbon and mineral fractions, and the carbon fraction has been generally considered to determine its properties and applications. Recently, an increasing body of research has demonstrated that mineral components inherent in biochar, such as alkali or alkaline earth metals in the form of carbonates, phosphates, or oxides, could also influence the properties and thus the applications. The review articles published thus far have mainly focused on multiple environmental and agronomic applications of biochar, including carbon sequestration, soil improvement, environmental remediation, etc...
June 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28628867/the-improvement-of-multi-contaminated-sandy-loam-soil-chemical-and-biological-properties-by-the-biochar-wood-ash-and-humic-substances-amendments
#3
Maria Pukalchik, Filip Mercl, Maria Panova, Kateřina Břendová, Vera A Terekhova, Pavel Tlustoš
Addition of low amount of humic substances, as a supplement to biochar or wood ash, can markedly enhance their remediation ability.
June 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28624637/developing-a-new-bayesian-risk-index-for-risk-evaluation-of-soil-contamination
#4
M T D Albuquerque, S Gerassis, C Sierra, J Taboada, J E Martín, I M H R Antunes, J R Gallego
Industrial and agricultural activities heavily constrain soil quality. Potentially Toxic Elements (PTEs) are a threat to public health and the environment alike. In this regard, the identification of areas that require remediation is crucial. In the herein research a geochemical dataset (230 samples) comprising 14 elements (Cu, Pb, Zn, Ag, Ni, Mn, Fe, As, Cd, V, Cr, Ti, Al and S) was gathered throughout eight different zones distinguished by their main activity, namely, recreational, agriculture/livestock and heavy industry in the Avilés Estuary (North of Spain)...
June 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28624590/maleic-acid-assisted-improvement-of-metal-chelation-and-antioxidant-metabolism-confers-chromium-tolerance-in-brassica-juncea-l
#5
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/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/28622649/influence-of-surface-chemistry-of-carbon-materials-on-their-interactions-with-inorganic-nitrogen-contaminants-in-soil-and-water
#7
REVIEW
Sumaraj, Lokesh P Padhye
Inorganic nitrogen contaminants (INC) (NH4(+), NO3(-), NO2(-), NH3, NO, NO2, and N2O) pose a growing risk to the environment, and their remediation methods are highly sought after. Application of carbon materials (CM), such as biochar and activated carbon, to remediate INC from agricultural fields and wastewater treatment plants has gained a significant interest since past few years. Understanding the role of surface chemistry of CM in adsorption of various INC is highly critical to increase adsorption efficiency as well as to assess the long term impact of using these highly recalcitrant CM for remediation of INC...
June 7, 2017: Chemosphere
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/28613079/rhizoremediation-of-residual-sulfonylurea-herbicides-in-agricultural-soils-using-lens-culinaris-and-a-commercial-supplement
#9
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
#10
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/28611742/analysis-of-the-genome-and-mobilome-of-a-dissimilatory-arsenate-reducing-aeromonas-sp-o23a-reveals-multiple-mechanisms-for-heavy-metal-resistance-and-metabolism
#11
Witold Uhrynowski, Przemyslaw Decewicz, Lukasz Dziewit, Monika Radlinska, Pawel S Krawczyk, Leszek Lipinski, Dorota Adamska, Lukasz Drewniak
Aeromonas spp. are among the most ubiquitous microorganisms, as they have been isolated from different environmental niches including waters, soil, as well as wounds and digestive tracts of poikilothermic animals and humans. Although much attention has been paid to the pathogenicity of Aeromonads, the role of these bacteria in environmentally important processes, such as transformation of heavy metals, remains to be discovered. Therefore, the aim of this study was a detailed genomic characterization of Aeromonas sp...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28609847/soil-contamination-with-cadmium-consequences-and-remediation-using-organic-amendments
#12
REVIEW
Muhammad Amjad Khan, Sardar Khan, Anwarzeb Khan, Mehboob Alam
Cadmium (Cd) contamination of soil and food crops is a ubiquitous environmental problem that has resulted from uncontrolled industrialization, unsustainable urbanization and intensive agricultural practices. Being a toxic element, Cd poses high threats to soil quality, food safety, and human health. Land is the ultimate source of waste disposal and utilization therefore, Cd released from different sources (natural and anthropogenic), eventually reaches soil, and then subsequently bio-accumulates in food crops...
June 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28609121/alleviatory-effect-of-spent-pleurotus-eryngii-quel-substrate-on-replant-problem-of-rehmannia-glutinosa-libosch
#13
Bao Zhang, Xuanzhen Li, Liuji Zhang, Li Gu, Fajie Feng, Ming-Jie Li, Fengji Wang, Wenxiong Lin, Zhong-Yi Zhang
Rehmannia glutinosa Libosch. is a medicinal plant cultivated at a commercial scale in China. However, replanting problems result in a severe decline in both the biomass and quality of its roots which are of greatest medicinal value. This study attempted to remediate the replant soil using spent Pleurotus eryngii Quel substrate for alleviating this issue, and to investigate the underlying mechanisms. Results showed that R. glutinosa grew successfully in fresh soil and remedial replant soil, while no roots were harvested in the unremedied replant soil...
June 13, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28605844/combination-of-aquatic-species-and-safeners-improves-the-remediation-of-copper-polluted-water
#14
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/28602003/evaluation-of-ethyl-lactate-as-solvent-in-fenton-oxidation-for-the-remediation-of-total-petroleum-hydrocarbon-tph-contaminated-soil
#15
Seyedeh Pegah Jalilian Ahmadkalaei, Suyin Gan, Hoon Kiat Ng, Suhaimi Abdul Talib
Due to the health and environmental risks posed by the presence of petroleum-contaminated areas around the world, remediation of petroleum-contaminated soil has drawn much attention from researchers. Combining Fenton reaction with a solvent has been proposed as a novel way to remediate contaminated soils. In this study, a green solvent, ethyl lactate (EL), has been used in conjunction with Fenton's reagents for the remediation of diesel-contaminated soil. The main aim of this research is to determine how the addition of EL affects Fenton reaction for the destruction of total petroleum hydrocarbons (TPHs) within the diesel range...
June 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28597163/shift-in-microbial-group-during-remediation-by-enhanced-natural-attenuation-rena-of-a-crude-oil-impacted-soil-a-case-study-of-ikarama-community-bayelsa-nigeria
#16
Chioma Blaise Chikere, Christopher Chibueze Azubuike, Evan Miebaka Fubara
Acute and chronic pollution of environments with crude oil does not bode well for biota living within the vicinity of polluted environments. This is due to environmental and public health concerns on the negative impact of crude oil pollution on living organisms. Enhancing microbial activities by adding nutrients and other amendments had proved effective in pollutant removal during bioremediation. This study was carried out to determine how microbial group respond during remediation by enhanced natural attenuation (RENA) during a field-scale bioremediation...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28595145/potential-value-of-phosphate-compounds-in-enhancing-immobilization-and-reducing-bioavailability-of-mixed-heavy-metal-contaminants-in-shooting-range-soil
#17
B Seshadri, N S Bolan, G Choppala, A Kunhikrishnan, P Sanderson, H Wang, L D Currie, Daniel C W Tsang, Y S Ok, G Kim
Shooting range soils contain mixed heavy metal contaminants including lead (Pb), cadmium (Cd), and zinc (Zn). Phosphate (P) compounds have been used to immobilize these metals, particularly Pb, thereby reducing their bioavailability. However, research on immobilization of Pb's co-contaminants showed the relative importance of soluble and insoluble P compounds, which is critical in evaluating the overall success of in situ stabilization practice in the sustainable remediation of mixed heavy metal contaminated soils...
June 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28584447/analysis-of-eawag-bbd-pathway-prediction-system-for-the-identification-of-malathion-degrading-microbes
#18
Subramaniam Sivakumar, Palanivel Anitha, Balsubramanian Ramesh, Gopal Suresh
Insecticides are the toxic substances that are used to kill insects. The use of insecticides is believed to be one of the major factors behind the increase in agricultural productivity in the 20th century. The organophosphates are now the largest and most versatile class of insecticide used and Malathion is the predominant type utilized. The accumulation of Malathion in environment is the biggest threat to the environment because of its toxicity. Malathion is lethal to beneficial insects, snails, micro crustaceans, fish, birds, amphibians, and soil microorganisms...
2017: Bioinformation
https://www.readbyqxmd.com/read/28582748/mediational-influence-of-spent-mushroom-compost-on-phytoremediation-of-black-oil-hydrocarbon-polluted-soil-and-response-of-megathyrsus-maximus-jacq
#19
Michael Dare Asemoloye, Segun Gbolagade Jonathan, Adeniyi A Jayeola, Rafiq Ahmad
Ability of a plant to develop different adaptive strategies can also determine its capability for effective soil remediation. In this study, influence of spent mushroom compost (SMC) was tested on the phytoremediation of black oil hydrocarbon polluted soil and the response of Megathyrsus maximus (guinea grass). Studies were carried out in microcosm conditions by mixing different concentration of SMC viz., 10, 20, 30 and 40% in a 5 kg of contaminated soil along with control. Seeds of M. maximus was sown in tray for two weeks and allowed to grow for height of 10 cm and transplanted in to the different experimental pots...
June 2, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28578809/formulation-and-utilisation-of-spent-anaerobic-digestate-fluids-for-the-growth-and-product-formation-of-single-cell-algal-cultures-in-heterotrophic-and-autotrophic-conditions
#20
Alla Silkina, Myrto-Panagiota Zacharof, Guillaume Hery, Thibaud Nouvel, Robert W Lovitt
Spent anaerobically digested effluents of agricultural origin were collected and treated using membrane filtration to achieve three-large particle free-nutrient streams of N:P ratios of 16.53, 3.78 and 14.22. Three algal species were grown on these streams, achieving good levels of bioremediation of digester fluids simultaneously with biomass and associated end product formation. Nannochloropsis oceanica and Scenedesmus quadricuada, where proven highly effective in remediating the streams achieving ammonia and phosphate reduction over 60% while for Schizochytrium limacinum SR21 these serve as an ideal production medium for lipids and biomass reaching 16...
May 24, 2017: Bioresource Technology
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