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https://read.qxmd.com/read/30901690/enhancing-photocatalytic-activity-on-gas-phase-heavy-metal-oxidation-with-self-assembled-bioi-biocl-microflowers
#1
Xiaoming Sun, Jia Lu, Jiang Wu, Dayong Guan, Qizhen Liu, Naiqiang Yan
A one-pot synthetic approach to prepare self-assembled BiOI/BiOCl microflowers by a template-free coprecipitation method at room temperature has been developed. The physicochemical structure of BiOI/BiOCl microflowers were characterized using transmission electron microscopy (TEM), high resolution TEM (HRTEM), scanning electron microscopy (SEM). The composition information and bonding energy structure of the BiOI/BiOCl microflowers were studied by X-ray diffraction (XRD) and high-resolution X-ray photoelectron spectra (XPS), Fourier Transform Infrared Spectroscopy (FTIR), UV-vis diffuse reflectance spectroscopy (DRS) analysis and photoluminescence (PL) spectra...
March 15, 2019: Journal of Colloid and Interface Science
https://read.qxmd.com/read/30901684/comparative-studies-on-pb-ii-biosorption-with-three-spongy-microbe-based-biosorbents-high-performance-selectivity-and-application
#2
Nana Wang, Yuyin Qiu, Tangfu Xiao, Jianqiao Wang, Yuxiao Chen, Xingjian Xu, Zhichao Kang, Lili Fan, Hongwen Yu
Lead pollution in industrial-derived water has become an increasingly serious concern. The development of adsorbents with excellent efficiency, selectivity and separability using diverse microorganisms is ideal for treating lead pollution. In this study, gram-negative bacteria Pseudomonas putida I3, gram-positive bacteria Microbacterium sp. OLJ1 and mycelial fungus Talaromyces amestolkiae Pb served as raw materials to facilely synthesize sponge-like biosorbents via a one-step method at room temperature. SEM, EDS, FTIR, 13 C NMR, XRD and XPS were used for investigating the morphology and surface properties of these three biosorbents...
March 15, 2019: Journal of Hazardous Materials
https://read.qxmd.com/read/30901680/co-pyrolysis-of-metal-contaminated-oily-waste-for-oil-recovery-and-heavy-metal-immobilization
#3
Yuan Tian, Jianbing Li, Xiuyi Yan, Todd Whitcombe, Ron Thring
The treatment of metal-contaminated oily waste was investigated by using an approach of co-pyrolysis with hog fuel in a fixed bed reactor. Both oil recovery and heavy metal immobilization were evaluated. Three experimental factors, including pyrolysis temperature, reaction time, and hog fuel addition in the feedstock, were examined to find their effects on the treatment performance. Metal immobilization in the solid char obtained from co-pyrolysis was examined from its speciation characteristics. A higher pyrolysis temperature led to a decreased oil recovery but more non-bioavailable metal species in the char residue...
March 16, 2019: Journal of Hazardous Materials
https://read.qxmd.com/read/30901655/zn-overaccumulating-russula-species-clade-together-and-use-the-same-mechanism-for-the-detoxification-of-excess-zn
#4
Tereza Leonhardt, Jan Borovička, Jan Sácký, Jiří Šantrůček, Jan Kameník, Pavel Kotrba
It has been firmly established that macrofungi can accumulate large amounts of heavy metals in their sporocarps. However, the mechanisms of the accumulation and storage are being uncovered only recently. We have previously documented that Russula bresadolae can accumulate over 1 g Zn kg-1 dry weight and that sequestration of a substantial proportion of overaccumulated Zn involves binding with peptides, RaZBPs, seen so far only in this species. In this work we examined Zn contents of 360 sporocarp collections from unpolluted environments covering 114 species of the genus Russula...
March 12, 2019: Chemosphere
https://read.qxmd.com/read/30901653/geopolymers-produced-from-drinking-water-treatment-residue-and-bottom-ash-for-the-immobilization-of-heavy-metals
#5
Zehua Ji, Yuansheng Pei
Drinking water treatment residue (DWTR) and municipal waste incineration bottom ash (BA) have been traditionally considered as solid waste. With the development of urbanization, their subsequent treatment and resource regeneration need to be further researched. In this work, a composite geopolymer with BA and DWTR was successfully synthesized and applied in the immobilization of Cd, Pb and Zn. The analysis of the geopolymers with different ratios of BA and DWTR, curing times and heavy metals was performed through chemical analysis, SEM, FTIR, XRD, XPS, ICP-AES and compressive strength tests...
March 11, 2019: Chemosphere
https://read.qxmd.com/read/30901636/inhalation-bioaccessibility-of-cd-cu-pb-and-zn-and-speciation-of-pb-in-particulate-matter-fractions-from-areas-with-different-pollution-characteristics-in-henan-province-china
#6
Weiqin Xing, Qiang Zhao, Kirk G Scheckel, Lirong Zheng, Liping Li
Windowsill particulate matter (PM) samples were collected from an area near large lead-smelting facilities in Jiyuan (JP), the urban area of Jiyuan (JU) and the peri-urban area of Mianchi (MC) in Henan, China to investigate the concentration and inhalation bioaccessibility of Cd, Cu, Pb and Zn. The <10 μm portions of the samples were extracted with simulated lung fluid to assess the in vitro inhalation bioaccessibility. Lower concentrations of heavy metals were found in the MC samples than in the JP and the JU samples...
March 19, 2019: Ecotoxicology and Environmental Safety
https://read.qxmd.com/read/30901611/metal-and-metalloid-levels-in-blood-of-semipalmated-sandpipers-calidris-pusilla-from-brazil-suriname-and-delaware-bay-sentinels-of-exposure-to-themselves-their-prey-and-predators-that-eat-them
#7
Joanna Burger, David Mizrahi, Christian Jeitner, Nellie Tsipoura, Jason Mobley, Michael Gochfeld
Identifying animals as sentinels for humans and other animal species is an excellent method for understanding exposure to environmental contamination at different times and places. Shorebirds are useful sentinels because they have a world-wide distribution, eat a range of prey, and are eaten by a range of other species, including humans. We collected blood from semipalmated sandpipers (Calidris pusilla) wintering in northern (Suriname N = 71) and northeastern (Brazil N = 61) South America to examine levels of heavy metals and metalloids (arsenic, selenium), and compare them to blood levels in sandpipers at a heavily used stopover site in New Jersey (N = 30; Delaware Bay, NJ)...
March 1, 2019: Environmental Research
https://read.qxmd.com/read/30901586/hydrothermal-liquefaction-of-scenedesmus-abundans-biomass-spent-for-sorption-of-petroleum-residues-from-wastewater-and-studies-on-recycling-of-post-hydrothermal-liquefaction-wastewater
#8
Panneerselvam Sundar Rajan, Kannappan Panchamoorthy Gopinath, Jayaseelan Arun, Kirubanandam Grace Pavithra
In this study Scenedesmus abundans was used as a biosorbent material for removing hydrocarbons from simulated petroleum wastewater. Batch experiments resulted in the removal of 92.16% of hydrocarbons from simulated wastewater within 60 min. The spent biosorbent was converted to bio-oil through hydrothermal liquefaction process (HTL) at temperature range from 220 to 320 °C with 1 h holding time. Liquid hydrocarbons (bio-oil) yield was 43.4 wt% at 300 °C with 15 g of spent sorbent loading and possessed HHV of 39...
March 16, 2019: Bioresource Technology
https://read.qxmd.com/read/30901585/reduced-graphene-oxide-and-biofilms-as-cathode-catalysts-to-enhance-energy-and-metal-recovery-in-microbial-fuel-cell
#9
Yining Wu, Ling Wang, Min Jin, Fanying Kong, Hong Qi, Jun Nan
In this study, reduced graphene oxide (rGO) was developed and employed as cathode catalyst in a membrane-less microbial fuel cell (MFC) to improve energy and metal (copper) recovery in combined with biofilms. Results showed that rGO-based cathode exhibited better characterizations in structure and electron transfer than graphene oxide (GO)-based cathode. The voltage with rGO was about 67% increased, and Cu2+ removal efficiency was 43% improved as compared to GO. Cu species on cathode demonstrated the favorable Cu2+ reduction to Cu with the catalysis of rGO...
March 16, 2019: Bioresource Technology
https://read.qxmd.com/read/30900761/biosorption-of-heavy-metals-by-a-lead-pb-resistant-bacterium-staphylococcus-hominis-strain-amb-2
#10
Zeeshanur Rahman, Lebin Thomas, Ved Pal Singh
In the present study, a highly lead (Pb) resistant bacterium, Staphylococcus hominis strain AMB-2 was isolated from Mandoli industrial area, Delhi and selected for heavy metal biosorption considering multiple heavy metal resistance. In the batch experiment, both living and dead biomasses of strain AMB-2 showed biosorption of Pb and cadmium (Cd) in single and binary systems as analysed through ICM OES. Living biomass exhibited more biosorption of metals than dead biomass in both single and binary systems. However, in binary system, metals competed for the attachment sites on the bacterial surface, where Pb got more preference over Cd for the same...
March 22, 2019: Journal of Basic Microbiology
https://read.qxmd.com/read/30900214/heavy-metal-intoxication-and-amyotrophic-lateral-sclerosis-causal-or-casual-relationship
#11
Simona Portaro, Antonino Naro, Roberto Giorgianni, Emanuela Mazzon, Rocco Salvatore Calabrò
No abstract text is available yet for this article.
March 21, 2019: Aging Clinical and Experimental Research
https://read.qxmd.com/read/30900122/assessment-of-heavy-metals-in-different-organs-of-cattle-egrets-bubulcus-ibis-from-a-rural-and-urban-environment-in-pakistan
#12
Roheela Yasmeen, Hifsa Ali Muhammad, Syeda Shazia Bokhari, Uzma Rafi, Abdul Shakoor, Aisha Waheed Qurashi
The study was conducted to evaluate the concentration of essential elements (Cu, Fe, Mn, Ni, Se, Zn, and B) and non-essential elements (Cd, Pb, Hg, Cr, As, and Ni) in muscle, liver, bone, and intestine of matured cattle egret (Bubulcus ibis). Sampling was carried out at two sites of Lahore, Pakistan-Havalian Karbath (site I) and Mehmood Booti (site II)-over a period of 1 month in the winter season. Metal analyses of samples were carried out using inductively coupled plasma mass spectroscopy (ICPMS). The trend of essential elements in liver and intestine of site I was noticed as Fe > Zn > Cu > B > Mn > Se > Ni and almost same for bone and muscle as Fe > Zn > B > Mn > Cu > Se > Ni...
March 21, 2019: Environmental Science and Pollution Research International
https://read.qxmd.com/read/30900076/bioavailability-and-mobility-of-arsenic-cadmium-and-manganese-in-gold-mine-tailings-amended-with-rice-husk-ash-and-fe-coated-rice-husk-ash
#13
F S Tariq, A W Samsuri, D S Karam, A Z Aris, G Jamilu
This study was conducted to determine the effects of rice husk ash (RHA) and Fe-coated rice husk ash (Fe-RHA) on the bioavailability and mobility of As, Cd, and Mn in mine tailings. The amendments were added to the tailings at 0, 5, 10, or 20% (w/w) and the mixtures were incubated for 0, 7, 15, 30, 45, and 60 days. The CaCl2 extractable As, Cd, and Mn in the amended tailings were determined at each interval of incubation period. In addition, the tailings mixture was leached with simulated rain water (SRW) every week from 0 day (D 0) until day 60 (D 60)...
March 21, 2019: Environmental Monitoring and Assessment
https://read.qxmd.com/read/30900020/assessment-of-flood-induced-changes-in-soil-heavy-metal-and-nutrient-status-in-rajanpur-pakistan
#14
Farhan Hafeez, Noman Zafar, Rashid Nazir, Hafiz Muhammad Rashad Javeed, Muhammad Rizwan, Faridullah, Saeed Ahmad Asad, Akhtar Iqbal
Flood events around the globe have severely impaired the soil functioning resulting in compromised food security in several parts of the world. The current study was aimed to explore the impacts of floods on soil heavy metals and nutrients status at three locations; Tibbi Solgi (TS), Vinri Khosa (VK), and Noshehra West (NW-control) in the district Rajanpur of Punjab, Pakistan. TS and VK sites were under regular influence of flooding over the last many years, but no flood event was reported on NW site during the same tenure; hence, it served as control...
March 21, 2019: Environmental Monitoring and Assessment
https://read.qxmd.com/read/30898582/discovery-and-preclinical-development-of-iiim-160-a-bergenia-ciliata-based-anti-inflammatory-and-anti-arthritic-botanical-drug-candidate
#15
Sandip B Bharate, Vikas Kumar, Sonali S Bharate, Bikarma Singh, Gurdarshan Singh, Amarinder Singh, Mehak Gupta, Deepika Singh, Ajay Kumar, Surjeet Singh, Ram A Vishwakarma
OBJECTIVE: Bergenia ciliata (Haw.) Sternb. is used in the Indian traditional system of medicine to treat various ailments including rheumatism and to heal wounds. The objective of the present study was to perform a preclinical characterization of the B. ciliata-based botanical extract IIIM-160. METHODS: IIIM-160 was chemically standardized and analyzed for heavy metal content, aflatoxins, pesticides and microbial load. The in vitro and in vivo efficacies were determined in suitable models of inflammation, arthritis and nociception...
March 6, 2019: Journal of Integrative Medicine
https://read.qxmd.com/read/30897479/gasification-treatment-of-poplar-biomass-produced-in-a-contaminated-area-restored-using-plant-assisted-bioremediation
#16
Valeria Ancona, Anna Barra Caracciolo, Claudia Campanale, Benedetta De Caprariis, Paola Grenni, Vito Felice Uricchio, Domenico Borello
Remediation of polluted soils using phytoremediation techniques is an effective strategy. However, the use of the biomass from these soils for energy purposes may raise efficiency and pollution emission problems and there is currently little research on this issue. In this work, the main results of a fluidized-bed gasification treatment conducted on poplar biomass pruning residues from a multi-contaminated area are presented. The samples were collected from an experimental site in which a plant-assisted bioremediation (PABR) technology has been applied since 2013 to reduce the soil heavy metal (HM) and polychlorinated biphenyl (PCB) contents...
March 18, 2019: Journal of Environmental Management
https://read.qxmd.com/read/30897412/optimization-of-cadmium-biosorption-by-shewanella-putrefaciens-using-a-box-behnken-design
#17
Wenjuan Yuan, Juan Cheng, Hexiang Huang, Suli Xiong, Jingqi Gao, Jie Zhang, Su Feng
Microbial adsorption of heavy metals has been attracted more interest in the recent years. However, there are very few studies in investigating the biosorption of heavy metals by Shewanella putrefaciens, which is a metal reducing bacterium. Firstly, the effects of contact time, pH value, temperature, biomass dosage and initial cadmium concentration on the cadmium adsorption by Shewanella putrefaciens were studied by single factor experiments. Then, the response surface methodology (RSM) based on Box-Behnken design was used to optimize the cadmium adsorption by Shewanella putrefaciens...
March 18, 2019: Ecotoxicology and Environmental Safety
https://read.qxmd.com/read/30897184/green-olive-leaf-extract-ole-provides-cytoprotection-in-renal-cells-exposed-to-low-doses-of-cadmium
#18
Marianna Ranieri, Annarita Di Mise, Graziana Difonzo, Mariangela Centrone, Maria Venneri, Tommaso Pellegrino, Annamaria Russo, Maria Mastrodonato, Francesco Caponio, Giovanna Valenti, Grazia Tamma
Cadmium (Cd) is a heavy and highly toxic metal that contaminates air, food and water. Cadmium accumulates in several organs altering normal functions. The kidney is the major organ at risk of damage from chronic exposure to cadmium as a contaminant in food and water. This study aims to investigate the beneficial effects of OLE in renal collecting duct MCD4 cells exposed to a low dose cadmium (1 μM). In MCD4 cells cadmium caused an increase in ROS production, as well as generation of lipid droplets and reduced cell viability...
2019: PloS One
https://read.qxmd.com/read/30895545/fungi-as-potential-tool-for-polluted-port-sediment-remediation
#19
Grazia Cecchi, Greta Vagge, Laura Cutroneo, Giuseppe Greco, Simone Di Piazza, Massimo Faga, Mirca Zotti, Marco Capello
Contaminated sediments represent an important management problem that also concerns their remediation. Indeed, port dredging activities produce huge volumes of contaminated sediments that, in turn, require proper handling because of their quantity of inorganic and organic substances. Conventional management-remediation strategies of polluted sediment involve sediment washing, electron-chemical separation, and thermal treatment. Recently, bioremediation strategies have also been proposed as a promising answer to the problem of contaminated sediments...
March 20, 2019: Environmental Science and Pollution Research International
https://read.qxmd.com/read/30895541/effect-of-long-distance-inter-basin-water-transfer-on-the-bioavailability-of-cu-for-the-receiving-water
#20
Yan Zhang, Lei Kang, Shiwei Geng, Jinmei Wang, Cuiling Tan, Xiaoqiao Wang, Weijie Xu, Man Chai
Long-distance inter-basin water transfer solves the problem of unbalanced water resources in different regions. However, it also changes the natural water chemistry characteristics as well as the bioavailability of heavy metals in the receiving water. In this study, taking the South-to-North Water Transfer Project in China as an example, the basic physicochemical characteristics of the source water (in the Danjiangkou (DJK) Reservoir) and receiving water (in the Beitang (BT) Reservoir) were studied. The BLM (biotic ligand model) was used to study the effect of long-distance inter-basin water transfer on the bioavailability of Cu in receiving waters...
March 20, 2019: Environmental Science and Pollution Research International
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