Results 211 to 220 of about 178,335 (241)

Adsorption of Pb(II), EDTA, and Pb(II)-EDTA onto TiO2

Journal of Colloid and Interface Science, 1998
The adsorption of aqueous Pb(II), EDTA, and Pb(II)-EDTA complexes onto TiO{sub 2} were studied at both stoichiometric and non-stoichiometric Pb(II)/EDTA concentrations. For Pb(II)-TiO{sub 2} and ECTA-TiO{sub 2}, a typical cationic and anionic-type of adsorption was noted, respectively.
Muhammad S Vohra, Allen P Davis
openaire   +1 more source

Catalytic determination of Pb(II) in the presence of Cu(II)

Analytical and Bioanalytical Chemistry, 2002
A kinetic method is presented to determine micro-molar amounts of Pb(II) from various river and wastewater samples, in the presence of trace copper. The procedure is based on the catalytic effect of both species on the oxidation of mercaptosuccinic acid by chromate in acidic media. The extent of the reaction is followed spectrophotometrically at 420 nm
A, Rustoiu-Csavdari, S, Bâldea, D, Mihai   +2 more
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Pb(II) Ion-Imprinted Micro-Porous Particles for the Selective Separation of Pb(II) Ions

Journal of Nanoscience and Nanotechnology, 2014
Pb(II) ion-imprinted micro-porous particles were prepared from the ionic complexes formed between vinyl pyridine functional monomers and template Pb(II) ions. The self-assembled Pb(II)/monomer complex was suspension polymerized in the presence of divinylbenzene cross-linker. The prepared micro-particles were 400-600 μm in size.
Yang, Jiang, Dukjoon, Kim
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Microbial Pb(II) Precipitation: Kinetic Modelling of Pb(II) Removal and Microbial Growth

2020
The study aimed to propose a preliminary kinetic model for Pb(II) bioremoval by an industrially obtained microbial consortium. The consortium has previously been shown to be extremely effective at precipitating Pb(II) from solution. For data generation, 100 mL batch reactors were set up anaerobically and spiked with either 80 ppm Pb(II) or 500 ppm Pb ...
Horstmann, Carla, Brink, Hendrik Gideon, Chirwa, Evans M.N.   +2 more
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M1–E2 interference in the Zeeman spectra of Pb I and Pb II

Journal of Physics B: Atomic, Molecular and Optical Physics, 2009
Studies of the M1–E2 interference effect in the Zeeman spectra of two mixed-type forbidden lines, 733.2 nm of Pb I and 710.2 nm of Pb II, are reported. In the experiment, the odd isotope 207 of Pb was used. By the use of computer modelling techniques the simulated contours were fitted to the recorded spectra in order to determine the electric ...
S Werbowy, J Kwela
openaire   +1 more source

A novel lead(II) framework containing Pb–O–Pb and Pb–Cl–Pb helical chains

Inorganic Chemistry Communications, 2008
Abstract Under hydrothermal conditions, using 5-methyl-pyrazine-2-carboxylic acid (HL) and lead(II) chloride, a new 2D lead(II) framework [Pb(L)(μ2-Cl)(H2O)]n can be isolated, in which infinite Pb–O–Pb helical chains can be observed. Interestingly 1 stacks in ABAB… ways, in one layer right-handed Pb–O–Pb and left-handed Pb–Cl–Pb helical chains are ...
Bin Ding, En-Cui Yang, Jian-Hua Guo, Xiao-Jun Zhao, Xiu-Guang Wang   +4 more
openaire   +1 more source

Isotope shifts of multipole lines of Pb i and Pb II

Journal of the Optical Society of America B-Optical Physics, 2010
Studies of isotope shifts of three multipole lines between levels of the ground configuration 6s26p2 of Pb I, i.e.: 461.9 nm(1S0→3P1), 531.5 nm(1S0→3P2) and 733.2 nm(1D2→3P1), as well as 710.2 nm line (6s26p2P3∕2→6s26p2P1∕2) of Pb II are presented. We determined the isotope shifts between four stable isotopes: 204, 206, 207, 208.
Tomasz Jaroslaw Wasowicz, Slawomir Werbowy, Jerzy Kwela, Ryszard Drozdowski   +3 more
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Pb(II)-Carboxylate Structure and Reactivity: from Pb(II) Coordination Compounds to PbS Colloidal Nanocrystals

Inorganic Chemistry
Lead(II)-carboxylates are important precursors for preparing Pb-based semiconductor nanocrystals (NCs). However, the atomic structure of common Pb-carboxylate precursors (e.g., Pb-oleate) remains elusive. Here, we use a rigid yet soluble 4-tert-butylbenzoate (TBBA) as a model ligand to probe the binding and reactivity of Pb-carboxylates.
Joshua O. Gibson, Robert A. Brown, Fuyan Ma, Saryvoudh A. Mech, Chenjie Zeng   +4 more
openaire   +2 more sources

High-pressure and high-temperature transformation of Pb(ii)-natrolite to Pb(ii)-lawsonite

Dalton Transactions, 2016
We report on high-pressure and high-temperature chemical transformations of Pb2+-exchanged natrolite (Pb-NAT, Pb8Al16Si24O80·16H2O) using a combination ofin situsynchrotron X-ray powder diffraction andex situHAADF-STEM real space imaging.
Junhyuck, Im, Yongmoon, Lee, Douglas A, Blom, Thomas, Vogt, Yongjae, Lee   +4 more
openaire   +2 more sources

Cystine-modified biomass for Cd(II) and Pb(II) biosorption

Journal of Hazardous Materials, 2007
The surface of dried biomass of baker's yeast was modified by crosslinking cystine with glutaraldehyde. X-ray photoelectron spectroscopy and microscope were used to characterize the modified biomass. The adsorption capacity of the modified biomass for Cd(2+) and Pb(2+) showed an increase compared with the pristine biomass due to the presence of cystine
Junxia, Yu, Mi, Tong, Xiaomei, Sun, Buhai, Li   +3 more
openaire   +2 more sources