Pre-Concentration Capability for Trace Heavy Metal Ions with Manual-Controlled Injection Porous Nano-Barium-Strontium Titanate Microspheres Enricher

2012 ◽  
Vol 433-440 ◽  
pp. 689-692
Author(s):  
Dong Zhang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Heavy Metal Ions ◽  
Silver Ions ◽  
Barium Strontium ◽  
Nickel Copper ◽  
Copper Manganese ◽  
Zinc Nickel

The micro-column packed with porous nano-barium- strontium titanate microspheres, joining with injector, a new manual-controlled injection porous nano-barium- strontium titanate microspheres enricher (PBSTME) was prepared. The enrichment capability of the PBSTME for the heavy metal ions, such as zinc, nickel, copper, manganese, cobalt and silver was investigated. The results showed that all the heavy metals studied could be quantitatively retained by the PBSTME in the pH range of 5–8, and then eluted completely with 2 mol•L-1 HNO3. The detection limits of this method for zinc, nickel, copper, manganese, cobalt and silver ions were 0.028 μg•L-1, 0.2μg•L-1, 0.031 μg•L-1, 0.022 μg•L-1, 0.057μg•L-1 and 0.039 μg•L-1 with an enrichment factor of 50, respectively. A new method has been developed for the determination of trace heavy metal ions based on pre-concentration with a PBSTME prior to their determination by flame atomic absorption spectrometry. The method has been applied to the simultaneous determination of trace amounts of zinc, nickel, copper, manganese, cobalt and silver ions in water sample with satisfactory results.

Removal of Heavy Metal Ions from Water Using Nano-Barium Strontium Titanate Immobilized on the Silica Gel G as an Adsorbent

2011 ◽  
Vol 71-78 ◽  
pp. 3500-3503 ◽  
Author(s):  
Dong Zhang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Heavy Metal Ions ◽  
Silver Ions ◽  
Copper Nickel ◽  
Barium Strontium ◽  
Nickel Cobalt ◽  
Manganese Copper

A new method based on the sorption of the nano-barium strontium titanate immobilized on the silica gel G(GBST) to heavy metal ions, included Mn(Ⅱ), Cu2+, Ni2+,Co2+and Ag+, in waste water. The effects of process parameters such as pH, contact time, regeneration conditions and the effects of common coexisting ions on the ions uptake were investigated. The results showed that the manganese, copper, nickel, cobalt and silver ions studied could be quantitatively retained at a pH value range of 7~9. The adsorption capacities of GBST for manganese, copper, nickel, cobalt and silver ions were found to be 8.2 mg/g, 18.3 mg/g, 4.2 mg/g, 2.2 mg/g and 3.1 mg/g, respectively. The heavy metal ions adsorbed on the sorbent could be eluated completely with diluted HNO3solutions. The GBST can be used as an effective adsorbent for the treatment of wastewaters contaminated with manganese, copper, nickel, cobalt and silver ions.

Synthesis and characterizations of metal ions doped barium strontium titanate (BST) nanomaterials for photocatalytic and electrical applications: A mini review

2021 ◽  
Vol 112 (8) ◽  
pp. 665-677
Author(s):  
Kiflom Gebremedhn Kelele ◽  
Aschalew Tadesse ◽  
Tegene Desalegn ◽  
Suresh Ghotekar ◽  
Ruthramurthy Balachandran ◽  
...  
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Barium Titanate ◽  
Metal Ions ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Metal Ion ◽  
Dielectric Characteristics ◽  
Characterization Methods ◽  
Barium Strontium

Abstract The ferroelectric barium strontium titanate (Ba1-xSrxTiO3) is a homogeneous solid solution prepared from the mixture of barium titanate (BaTiO3), strontium titanate (SrTiO3) and titanium (IV) isopropoxide. Barium strontium titanate (BST) nanomaterials with improved permittivity and dielectric properties due to their nano-properties have attracted great interest for extensive and versatile applications as super capacitors, dielectrics, ceramics and catalysts. Introduction of metal ion dopants into the parent system of BST significantly alters its structural, morphological, electrical, optical and dielectric characteristics. This review is aimed at addressing synthesis, characterization methods, photocatalytic and electrical applications of metal ions doped BST nanomaterials. The effect of doping BST, through metal ions, on its properties and application with most probable reasons have been thoroughly discussed.

Target-initiated impedimetric proximity ligation assay with DNAzyme design for in situ amplified biocatalytic precipitation

The Analyst ◽  
2014 ◽  
Vol 139 (12) ◽  
pp. 2998-3001 ◽  
Author(s):  
Juan Tang ◽  
Minghua Lu ◽  
Dianping Tang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Silver Ions ◽  
Proximity Ligation Assay ◽  
Proximity Ligation ◽  
Precipitation Technique ◽  
First Time ◽  
Assay Protocol

A target-initiated proximity ligation assay protocol with DNAzyme formation was for the first time designed for ultrasensitive impedimetric monitoring of heavy metal ions (silver ions were used in this case) by coupling with an enzymatic biocatalytic precipitation technique.

scholarly journals Solubility and Selectivity Effects of the Anion on the Adsorption of Different Heavy Metal Ions onto Chitosan

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2482 ◽  
Author(s):  
Janek Weißpflog ◽  
Alexander Gündel ◽  
David Vehlow ◽  
Christine Steinbach ◽  
Martin Müller ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Heavy Metal Ions ◽  
Batch Experiments ◽  
Sorption Mechanism ◽  
Iron Cobalt ◽  
Cobalt Nickel ◽  
Adsorption Capacities ◽  
Nickel Copper

The biopolymer chitosan is a very efficient adsorber material for the removal of heavy metal ions from aqueous solutions. Due to the solubility properties of chitosan it can be used as both a liquid adsorber and a solid flocculant for water treatment reaching outstanding adsorption capacities for a number of heavy metal ions. However, the type of anion corresponding to the investigated heavy metal ions has a strong influence on the adsorption capacity and sorption mechanism on chitosan. In this work, the adsorption capacity of the heavy metal ions manganese, iron, cobalt, nickel, copper, and zinc were investigated in dependence on their corresponding anions sulfate, chloride, and nitrate by batch experiments. The selectivity of the different heavy metal ions was analyzed by column experiments.

Synthesis of Nano-Strontium Titanate Immobilised on the Silica Gel G and its Application in Removal of Heavy Metal Ions from Water

2011 ◽  
Vol 194-196 ◽  
pp. 751-754
Author(s):  
Dong Zhang ◽  
Yan Cheng
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Silica Gel ◽  
Strontium Titanate ◽  
Heavy Metal Ions ◽  
X Ray Diffraction ◽  
Promising Candidate ◽  
Experimental Conditions ◽  
Mixture System

A new adsorption agent, nanosized strontium titanate immobilized on the silica gel G (GSTO) was prepared, and it was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The ability of the new adsorption to remove heavy metal Pb, Cd, Zn, Cu, Ni and Mn from water samples was assessed. The research results displayed that adsorbent has the highest adsorption capacity for Pb, Cd, Zn, Cu, Ni and Mn in ions mixture system. Optimal experimental conditions including pH and contact time have been established. Desorption studies were carried out successfully with diluted HNO3 solutions. Thus, nano-strontium titanate immobilized on the silica gel G is favorable and useful for the removal of these heavy metal ions, and the high adsorption capacity makes it a good promising candidate material for Pb, Cd, Zn, Cu, Ni and Mn removal.

Synthesis and Application of Novel Heavy Metal Ions Chelator

2011 ◽  
Vol 374-377 ◽  
pp. 937-940
Author(s):  
Zhuan Nian Liu ◽  
Ye Jing Song ◽  
Xiao Gang Han
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Heavy Metal Ions ◽  
Reaction Parameters ◽  
Synthesis Conditions ◽  
Nickel Copper ◽  
Heavy Metals Ions ◽  
Copper Lead

Polyacrylamide-urea-sulfanilamide(PUS) was prepared as a novel heavy metal ions chelator and successfully used to simultaneously remove heavy metals from wastewater effluents. The effects of reaction parameters (sodium hydroxide, material ratio, temperature and contact time) were monitored to specify the best synthesis conditions. PUS was chemically characterized by means of infrared spectroscopy (FTIR). The simultaneous chelation performance of PUS towards selected heavy metals ions, nickel, copper, lead, cadmium and zinc, was discussed, and Ni2+, Cu2+, Pb2+, Zn2+ can be chelated better especially, indicating that the synthesized PUS is a potential remediation material when used for the treatment of wastewater containing metal ions.

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