New Organo-Inorganic Materials for Water Contaminants Remediation

2007 ◽  
Vol 1007 ◽  
Author(s):  
Araceli Ortiz-Polo ◽  
Rosa M Richards-Uribe ◽  
Elena M Otazo-Sánchez ◽  
Francisco Prieto-García ◽  
Juan Hernández-Ávila ◽  
...  
Keyword(s):  
Metal Ions ◽  
Low Cost ◽  
Toxic Metal ◽  
Inorganic Materials ◽  
Contaminated Water ◽  
Metallic Ions ◽  
Water Contaminants ◽  
Natural Mineral ◽  
X Ray ◽  
Mineral Soils

ABSTRACTMaterials with high specific surface areas such as pillared clays and zeolites have been studied and can be used to remediate contaminated water. Chemical functionality or compounds can be anchored or attached to the surface of a low-cost material used as a support matrix. This work studied the suitability of inexpensive natural mineral soils to decontaminate waste water from mine and metallurgic industries. Native mineral soils were also impregnated with commercial 1,3 diphenyltiourea (DFT) to improve retention of heavy metal ions. The natural mineral soils were from Hidalgo State in Mexico: white marble (calcite: CaCO3), volcanic gravels named “red and black tezontles” (anorthite matrix: CaO.Al2O3.(SiO2)2 with FexOy and PbxOy), green zeolites (mordenite: Na2CaK2. OAl2O3.10SiO2.7H2O) and kaolin (kaolinite: Al2O3(SiO2)2.H2O). They were ground and sieved. The 50 mesh fraction was studied by Raman and FTIR spectroscopy, X ray powder diffraction and scanning electronic microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDX). From these solids new hybrid materials were prepared by impregnation with DFT in ethanolic solutions. Products were characterized and compared with untreated materials. Tezontles, zeolites and kaolinite showed the best impregnation levels. In their surfaces, grown DFT crystals showed different structures. The obtained hybrid solids were tested using several metallic ion solutions: Mn(II), Ni(II), Co(II), Cd(II), Hg(II), Pb(II), Cu(II) and Zn(II). The metallic adducts were analyzed and the adsorption capacity is discussed. The materials showed high remotion percentages for all metal ions and low Hg(II), Pb(II) and Cd(II) final concentrations. They have good potential for use in remediation of contaminated water with highly toxic metal ions. The metallic adducts were characterized by FTIR and Raman spectroscopy, as well as SEM/EDX analysis. However, all of mentioned methods were not useful for detection of impregnated DFT nor adsorbed or coordinated metallic ions on the supporting materials. Only the SEM/EDX method was found to be suitable for analysis.

scholarly journals Triple-Ringed Luminescent Heptanuclear Zn(II) Cluster for Efficient Ag(I) Ion Sensing Materials

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 374 ◽  
Author(s):  
Qian-Jun Deng ◽  
Min Chen ◽  
Dong-Chu Chen ◽  
Zhong-Hong Zhu ◽  
Hua-Hong Zou
Keyword(s):  
Metal Ions ◽  
Toxic Metal ◽  
Organic Ligands ◽  
Single Crystal Diffraction ◽  
Coordination Environment ◽  
X Ray ◽  
Ion Sensing ◽  
Efficient Detection ◽  
Recognition Ability ◽  
Efficient Recognition

The organic ligands (E)-8-hydroxyquinoline-2-carbaldehyde oxime (H2L1) and furan-2-ylmethanamine (H2L2) were used to react with Zn(NO3)2·6H2O at 140 °C solvothermal for two days to obtain the heptanuclear Zn(II) cluster [Zn7(L1)4(HL1)2(H2L2)(µ2-OH)(µ2-O)(NO3)] (1). The X-ray single crystal diffraction reveals that every five-coordinated Zn(II) ions are surrounded by two N atoms and three O atoms with the N2O3 coordination environment and four-coordinated Zn(II) ion surrounded by one N atom and three O atoms in the NO3 coordinated environment. The photoluminescence of cluster 1 is obvious. Moreover, in the presence of Ag(I) ions, cluster 1 exhibits an efficient recognition ability, and it realizes the recognition of toxic metal ions. Here, we have developed cluster-based sensing materials for the efficient detection of heavy metal ions Ag(I) strategies.

Fabrication and Application of Low-Cost Thiol Functionalized Coal Fly Ash for Selective Adsorption of Heavy Toxic Metal Ions from Water

2017 ◽  
Vol 56 (6) ◽  
pp. 1461-1470 ◽  
Author(s):  
Subhajit Dash ◽  
Haribandhu Chaudhuri ◽  
Radha Gupta ◽  
Udayabhanu G. Nair ◽  
Ashis Sarkar
Keyword(s):  
Fly Ash ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Toxic Metal ◽  
Toxic Metal Ions

The Application of Red Mud on Restoring Heavy Metal Contaminated Water and Soil

2011 ◽  
Vol 225-226 ◽  
pp. 1262-1265 ◽  
Author(s):  
Yan Fei Ma ◽  
Xue Dong Feng
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Red Mud ◽  
Heavy Metal Ions ◽  
Alkali Treatment ◽  
Low Cost ◽  
Soil Microbial Activity ◽  
Contaminated Water ◽  
Environmental Restoration ◽  
Soil Microbial

Red mud as environmental restoration materials has the characteristics of low cost, simple process and controlling waste by waste. The paper introduced the application of red mud on heavy metal contaminated water and soil in details. Powdered or granular red mud both has good adsorption efficiency of Cu , Zn, Pb, Ni, Ca, Cd, As and other heavy metal ions in wastewater. Langmiur or Frendlich model can express the adsorption isotherm of red mud on heavy metal ions. Red mud can not only solidify the heavy metals in soils, but also increase the soil microbial activity and population types. At the same time, de-alkali treatment can not be ignored in the process of using red mud avoiding the second pollution to environment, and achieve the zero pollution release of red mud.

Evaluation of a low-cost adsorbent for removal of toxic metal ions from wastewater of an electroplating factory

2009 ◽  
Vol 90 (11) ◽  
pp. 3340-3344 ◽  
Author(s):  
Francisco W. Sousa ◽  
Marcelo James Sousa ◽  
Isadora R.N. Oliveira ◽  
André G. Oliveira ◽  
Rivelino M. Cavalcante ◽  
...  
Keyword(s):  
Metal Ions ◽  
Low Cost ◽  
Toxic Metal ◽  
Toxic Metal Ions

Bulgarian natural diatomites: modification and characterization

2013 ◽  
Vol 67 (3) ◽  
Author(s):  
Paunka Vassileva ◽  
Madlena Apostolova ◽  
Albena Detcheva ◽  
Elisaveta Ivanova
Keyword(s):  
Manganese Oxide ◽  
Surface Area ◽  
Low Cost ◽  
Toxic Metal ◽  
Sorption Properties ◽  
Contaminated Water ◽  
Sorption Behavior ◽  
High Sorption Capacity ◽  
High Sorption ◽  
Modified Diatomite

AbstractNatural Bulgarian diatomite modified by oxidation with sulfuric acid and H2O2 or by coating with manganese oxide was characterized considering its chemical composition, surface area, pore volume, and structure. Modified diatomites displayed larger surface area and pore volumes in comparison with untreated natural diatomite, which favored their sorption behavior. Sorption properties of diatomites towards Fe3+, Pb2+, Cu2+, Cd2+, Mn2+, Ni2+, Co2+, Cr3+, Pd2+, Ca2+, and Mg2+ were investigated and their sorption capacities were determined. Sorption properties of manganese oxide-modified diatomite were superior to those of diatomite modified by oxidation. Owing to its high sorption capacity towards Co2+, Ni2+, Pb2+, Cr3+, Fe2+, Cu2+, and Cd2+, the manganese oxide-modified diatomite is a promising low-cost sorbent for selective removal of milligram amounts of these toxic metal ions from contaminated water.

scholarly journals LignoPhot: Photoactive Hybrid lignin/Bi4O5Br2/BiOBr Composite for Complex Pollutants Removal

2021 ◽  
Author(s):  
Tetyana Budnyak ◽  
Joy Onwumere ◽  
Ievgen V. Pylypchuk ◽  
Aleksander Jaworski ◽  
Jianhong Chen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Metal Ions ◽  
Photoelectron Spectroscopy ◽  
Organic Dyes ◽  
Dye Degradation ◽  
Low Cost ◽  
Resonance Spectroscopy ◽  
Hydrolysis Lignin ◽  
X Ray ◽  
Main Component

Valorization of lignin is still an open question and lignin has therefore remained an underutilized biomaterial. This situation is even more pronounced for hydrolysis lignin, which is characterized by a highly condensed and excessively cross-linked structure. We report on photoactive lignin/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>/BiOBr bio-inorganic composites consisting of a lignin substrate that is coated by Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>/BiOBr nanosheet photocatalysts. The structure of the hybrid material was investigated by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy including energy dispersive X-ray (EDX) spectroscopy, and solid state <sup>1</sup>H−<sup>13</sup>C nuclear magnetic resonance spectroscopy (<sup>1</sup>H−<sup>13</sup>C NMR). The material contains 18.9% of Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>/BiOBr and was found to be effective for the photocatalytic degradation of cationic methylene blue (MB) and zwitterionic rhodamine B (RhB) dyes under irradiation with 405 nm light. Lignin/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>/BiOBr was able to decrease the dye concentration from 80 mg·L<sup>–1</sup> to 12.3 mg·L<sup>–1</sup> for RhB (85%) and from 80 mg·L<sup>–1</sup> to 4.4 mg·L<sup>–1</sup> for MB (95%). Complementary to the dye degradation, the lignin as a main component of the composite, was found to be efficient and rapid biosorbent for metal ions in aqueous solutions. The highest adsorption capacity was found after 2 hours of phases contact and reached 0.45 mmol·g<sup>–1 </sup>for Ni(II) ions (neutral media). The low cost, simplicity of the synthesis, good stability and ability to simultaneously photooxidize organic dyes and to adsorb metal ions, make the developed photoactive lignin/Bi<sub>4</sub>O<sub>5</sub>Br<sub>2</sub>/BiOBr composite a prospective material for textile wastewaters remediation

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