Results 211 to 220 of about 301,057 (248)

Cd(II) Speciation in Alginate Gels

Environmental Science & Technology, 2008
Polysaccharides, such as those occurring in cell walls and biofilms, play an important role in metal speciation in natural aqueous systems. This work describes the speciation of Cd(II) in alginate gels chosen as a model system for biogels. The gels are formed by bridging calcium ions at junction zones present along adjacent homopolymeric guluronic acid
Davis, T. A., Kalis, E. J. J., Pinheiro, J. P., Town, R. M., Van Leeuwen, H. P.   +4 more
openaire   +6 more sources

Binding of Cd(II) to birnessite and fulvic acid organo-mineral composites and controls on Cd(II) availability

Chemosphere, 2023
Manganese oxide minerals (MnOs) are major controls on cadmium (Cd) mobility and fate in the environment. However, MnOs are commonly coated with natural organic matter (OM), and the role of this coating in the retention and availability of harmful metals remains unclear. Herein, organo-mineral composites were synthesized using birnessite (BS) and fulvic
Changsheng, Jin, Zhongwu, Li, Mei, Huang, Xiang, Ding, Mi, Zhou, Jia, Chen, Bolin, Li   +6 more
openaire   +2 more sources

Complexation of sulfamethazine with Cd(II) and Pb(II): implication for co-adsorption of SMT and Cd(II) on goethite

Environmental Science and Pollution Research, 2018
This study quantified the complex stability constants of sulfamethazine (SMT) with cadmium (Cd2+) and lead (Pb2+) under different pH conditions. The UV-Vis spectrophotometer was used for acquiring the complexation data. Results showed that the complex stability constants of SMT with cadmium (Cd2+) and lead (Pb2+) increased as a function of the solution
Ting Tang, Chen Yang, Li Wang, Xianying Jiang, Zhi Dang, Weilin Huang   +5 more
openaire   +2 more sources

Simultaneous Removal of Cd(Ii) and As(V) by Ferrihydrite-Biochar Composite: Enhanced Effects of As(V) on Cd(Ii) Adsorption

SSRN Electronic Journal, 2022
The coexistence of cadmium (Cd(II)) and arsenate (As(V)) pollution has long been an environmental problem. Biochar, a porous carbonaceous material with tunable functionality, has been used for the remediation of contaminated soils. However, it is still challenging for the dynamic quantification and mechanistic understanding of the simultaneous ...
Wenjun Zeng, Yang Lu, Jingyan Zhou, Jie Zhang, Yuanxiao Duan, Changxun Dong, Wencheng Wu   +6 more
openaire   +2 more sources

Synthesis, characterization and removal of Cd(II) using Cd(II)-ion imprinted polymer

Journal of Hazardous Materials, 2009
A novel ion imprinted polymer (IIP), phenol-formaldehyde-Cd(II)-2-(p-sulphophenylazo)-1,8-dihydroxynaphthalene-3,6-disulphonate (PF-Cd(II)-SPANDS) has been synthesized for selective solid phase extraction (SPE) of Cd(II) from aqueous solutions. IIP was prepared by the copolymerization of phenol and formaldehyde in the presence of Cd(II)-SPANDS complex ...
Dhruv K, Singh, Shraddha, Mishra
openaire   +2 more sources

The binary Cd(II)-Zn(II) cyclo-tetraphosphates

Thermochimica Acta, 2000
Abstract The cyclo-tetraphosphates of the type Cd 2− x Zn x P 4 O 12 have been synthesized. The synthesis is based on a thermal procedure making use of the reversible transformation of cyclo-tetraphosphates to higher linear phosphates. This is the method used in our laboratory for synthesis of special pigments of binary cyclo-tetraphosphates ...
Miroslav Trojan, Petra Šulcová
openaire   +1 more source

Activation of yeast enolase by Cd(II)

Journal of Inorganic Biochemistry, 1984
Activation of yeast enolase by Cd2+ exhibits properties similar to activation by the physiological cofactor Mg2+. The activity is weakly stimulated, then inhibited by increasing ionic strength. The activity increases, then falls with increasing Cd2+ concentration.
S G, Spencer, J M, Brewer
openaire   +2 more sources

On the Problems of CD Spectropolarimeters. II: Artifacts in CD Spectrometers

Applied Spectroscopy, 1985
The Mueller matrix approach is used to investigate the artifacts resulting from the coupling of anisotropic samples and imperfect hardwares of commercially available CD spectropolarimeters. On the basis of the results obtained, attention is called to the instrumental limitation of CD spectropolarimeters in the study of CD phenomena of systems with ...
Yohji Shindo, Masayuki Nakagawa, Yasuhiro Ohmi   +2 more
openaire   +1 more source

EUV photoabsorption spectra of Cd II and Cd III

Journal of Physics B: Atomic, Molecular and Optical Physics, 2004
The photoabsorption spectrum of singly ionized cadmium has been measured in the 23.6–110 eV region using the dual laser plasma technique. We have observed many of the 4d105s → 4d95s np, mf transitions (7 ≤ n ≤ 9, 4 ≤ m ≤ 9) for the first time and identified them with the aid of Hartree–Fock and quantum defect calculations.
Deirdre Kilbane, Eugene T Kennedy, Jean-Paul Mosnier, John T Costello, Paul van Kampen   +4 more
openaire   +1 more source

Structures and stabilities of Cd(II) and Cd(II)-phthalate complexes at the goethite/water interface

Geochimica et Cosmochimica Acta, 2005
The complexation of Cd(II) and Cd(II)-phthalate at the goethite/water interface were investigated by EXAFS and IR spectroscopy, by batch adsorption experiments and by potentiometric titrations at 298.15 K. The EXAFS spectra showed Cd(II) to form only inner-sphere corner-sharing complexes with the goethite surface sites in the presence and absence of ...
Jean-François Boily, Staffan Sjöberg, Per Persson   +2 more
openaire   +1 more source