A simple, novel and sensitive spectrophotometric method was described for simultaneous determination of aluminum and bismuth mixtures. All factors affecting the sensitivity were optimized, and the linear dynamic range for determination of aluminum and bismuth found. The simultaneous determination of aluminum and bismuth and use of spectrophotometric methods is a difficult problem due to the spectral interference. The multivariate chemometrics methods were used for this study. Chemometrics methods such as continuous wavelet transform (CWT), wavelet orthogonal signal correction-partial least squares (WOSC-PLS) and least squares-support vector machine (LS-SVM) methods were used without prior separation steps. The method is based on the colored complexes formed by aluminum and bismuth with hematoxylin in the presence of cetyltrimethylammonium bromide as a surfactant at pH 5.8. In this study, absorption spectra were recorded in the wavelength range 400–650 nm. The results showed that aluminum and bismuth could be determined simultaneously in the range of 0.1–11.0 and 0.1–7.0 μg mL–1, respectively. The validation of the developed methods was tested by analyzing various synthetic mixtures of the aluminum and bismuth. The proposed methods have been applied to the simultaneous determination of aluminum and bismuth in vegetables and different water samples.
Spragues’ Ready Mix deploys closed loop recycling equipment - Case Study
California’s Spragues’ Ready Mix (SRM) has deployed the first closed-loop recycling equipment combination of its kind: A concrete reclaimer separating fine and coarse aggregate, coupled with a slurry-recycling filter that dewaters cement fines to yield nearly ASTM C-94 grade batch water (less than 60 ppm). The company decided to purchase the Liebherr LRS 708 Concrete Reclaimer and ALAR Auto-Vac AV640-C® Slurry-Water Recycling Filter combination. “The Liebherr/ALAR recycling system is...
Pet Recycun6 Plant Opens in Germany
German plastics recycling company TM Recycling has invested about €10 million ($13.4 million) to build a new PET plastics recycling facility. Construction of the plant is associated with the formation of PFR Nord GmbH in Hohenwestedt TM Recycling, along with AFA Nord GmbH, are a part of the German company Mensing Group, headquartered in Germany. The facility has been operating since June 2013 and is processing around 100 tonnes of PET bottles per day, according to Redwave systems, which supplied sensor...
New PET recycling plant at PFR Nord
The Mensing Unternehmensgruppe in Hohenwestedt (Germany) invests almost 10 million Euros in the construction of a new PET recycling plant. The construction of the recycling plant is associated with the new foundation of the PFR Nord GmbH in Hohenweststedt, where almost 30 new workplaces have been created. Altogether, the Mensing Group, which also includes the AFA Nord GmbH and the TM Recycling GmbH, employs a staff of 80. A modern PET recycling plant should be set up. PET in different qualities will be purchased,...
Oil mixing – color unimportant
A mineral oil is straight line product of oil refining that’s why their cost isn’t high. Properties of mineral oils: high evaporability, convertibility of chemical parameters in various service conditions of cars. Large numbers of additives in oil mixing process improve mineral oil properties.Synthetic oil has been manufactured by a synthesis method of chemical components. Properties of synthetic oils count theoretically, with the optimum and constant operational properties which aren’t depending...
Factors Affecting Oil in Water Testing Methods
Various factors need to beconsidered when comparing methods to measure oil and grease in water. Whether you are trying to meet effluent limits for an NPDES (National Pollutant Discharge Elimination System) permit, comply with oil and grease limits for the Clean Water Act (CWA), or an industry satisfying a POTW’s (Publically Owned Treatment Works) discharge permit, it is important to understand what could make oil in water readings vary. The following factors need to be considered when comparing oil in...