نتایج جستجو برای: lead sulfide

تعداد نتایج: 356182  

Journal: :Chemical Engineering Journal 2022

A versatile, scalable, room temperature and surfactant-free route for the synthesis of metal chalcogenide nanoparticles in aqueous solution is detailed here production PbS Cu-doped nanoparticles. Subsequently, are annealed a reducing atmosphere to remove surface oxide, consolidated into dense polycrystalline materials by means spark plasma sintering. By characterizing transport properties sinte...

Journal: :Bioresource technology 2016
J Mal Y V Nancharaiah E D van Hullebusch P N L Lens

This study investigated bioreduction of selenite by anaerobic granular sludge in the presence of heavy metals and analyzed the fate of the bioreduced selenium and the heavy metals. Selenite bioreduction was not significantly inhibited in the presence of Pb(II) and Zn(II). More than 92% of 79 mg/L selenite was removed by bioreduction even in the presence of 150 mg/L of Pb(II) or 400mg/L of Zn(II...

Journal: :Nanotechnology 2009
Teng Huang Limin Qi

PbSe nanotubes were successfully synthesized by a reactive template approach via solvothermal transformation of trigonal selenium (t-Se) nanotubes in ethylene glycol. It was revealed that a relatively high reaction temperature (e.g., 200 degrees C), adequate ascorbic acid, and proper lead source were crucial for preparing PbSe nanotubes through shape-preserved transformation of t-Se nanotubes. ...

2016
Angela Corvino Beatrice Severino Ferdinando Fiorino Francesco Frecentese Elisa Magli Elisa Perissutti Vincenzo Santagada Mariarosaria Bucci Giuseppe Cirino Geoff Kelly Luigi Servillo Grzegorz Popowicz Annalisa Pastore Giuseppe Caliendo

Hydrogen sulfide is an essential catabolite that intervenes in the pathophysiology of several diseases from hypertension to stroke, diabetes and pancreatitis. It is endogenously synthesized mainly by two pyridoxal-5'-phosphate-dependent enzymes involved in L-cysteine metabolism: cystathionine-ß-synthase (CBS) and cystathionine-γ-lyase (CSE). Research in this field is currently impaired by the l...

2015
Soraia El Baz Mohamed Baz Mustapha Barakate Lahcen Hassani Abdelhay El Gharmali Boujamâa Imziln

Accumulation of high concentrations of heavy metals in environments can cause many human health risks and serious ecological problems. Nowadays, bioremediation using microorganisms is receiving much attention due to their good performance. The aim of this work is to investigate heavy metals resistance and bioaccumulation potential of actinobacteria strains isolated from some abandoned mining ar...

2016
Tatsuo Nozaki Jun-Ichiro Ishibashi Kazuhiko Shimada Toshiro Nagase Yutaro Takaya Yasuhiro Kato Shinsuke Kawagucci Tomoo Watsuji Takazo Shibuya Ryoichi Yamada Tomokazu Saruhashi Masanori Kyo Ken Takai

Seafloor massive sulphide deposits are potential resources for base and precious metals (Cu-Pb-Zn ± Ag ± Au), but difficulties in estimating precise reserves and assessing environmental impacts hinder exploration and commercial mining. Here, we report petrological and geochemical properties of sulphide chimneys less than 2 years old that formed where scientific boreholes vented hydrothermal flu...

Journal: :Journal of toxicology and environmental health. Part A 2015
Edgar Pinto Carlos Soares Cristina M C M Couto Agostinho Almeida

Because of the scientific evidence showing that arsenic (As), cadmium (Cd), and nickel (Ni) are human genotoxic carcinogens, the European Union (EU) recently set target values for metal concentration in ambient air (As: 6 ng/m(3), Cd: 5 ng/m(3), Ni: 20 ng/m(3)). The aim of our study was to determine the concentration levels of these trace elements in Porto Metropolitan Area (PMA) in order to as...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Keiichi Fujimori Kenta Tsujimoto Takayo Moriuchi-Kawakami Yasuhiko Shibutani Masato Ueda Takahiko Suzue Hideshi Kimoto Kei Okamura

A new chemiluminescence method is proposed for the determination of sulfide in seawater based on the chemiluminescence reaction between sulfide and an acidic permanganate solution. 3-Cyclohexylaminopropanesulfonic acid was used as a chemiluminescence enhancer. By use of this method, 1-150 µM of sulfide could be determined in artificial seawater. The limit of detection was 0.17 µM sulfide. We in...

Journal: :The Analyst 2016
Tailin Xu Nikki Scafa Li-Ping Xu Shufeng Zhou Khalid Abdullah Al-Ghanem Shahid Mahboob Bunshi Fugetsu Xueji Zhang

The measurement of sulfide, especially hydrogen sulfide, has held the attention of the analytical community due to its unique physiological and pathophysiological roles in biological systems. Electrochemical detection offers a rapid, highly sensitive, affordable, simple, and real-time technique to measure hydrogen sulfide concentration, which has been a well-documented and reliable method. This...

Journal: :Advanced Energy Materials 2022

Quantum Dot Solar Cells In article number 2202994, Yana Vaynzof and co-workers report on a strategy to eliminate excess lead halide species from the interdot spacing of sulfide quantum dot solar cells. This process significantly enhances coupling, resulting in improved efficiency stability photovoltaic devices.

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