The toxicity characteristic leaching procedure (TCLP) is one test used by the U.S. Environmental Protection Agency (EPA) to determine if a waste material is hazardous; the TCLP test is widely used by the environmental testing community. The elements of concern for toxicity are arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver. As an environmental forensic laboratory, the N...

Hard X-ray fluorescence (XRF) microscopy offers unparalleled sensitivity for quantitative analysis of most of the trace elements in biological samples, such as Fe, Cu, and Zn. These trace elements play critical roles in many biological processes. With the advanced nano-focusing optics, nowadays hard X-rays can be focused down to 30 nm or below and can probe trace elements within subcellular com...

The X-Ray Flash (XRF), 031203 with a host galaxy at z = 0.1055, is, apart from GRB 980425, the closest γ-Ray Burst (GRB) or XRF known to date. We have monitored its host galaxy from 1–100 days after the burst. In spite of the high extinction to the source and the bright host, a significant increase and subsequent decrease has been detected in the apparent brightness of the host, peaking between...

صخلملا Seasonal variation of zooplankton biomass has been carried out at two selected sites on Greater Zab River. Monthly samples of water were collected during period from January to December 2008. Some physico-chemical properties of water were studied including water temperature (from 8 to 30.5 C), hydrogen ion concentration (from 6.3 to 8), EC (from 255 to 821 μs.cm), turbidity (1085 NTU), d...

Abstract This research aims at producing and characterizing a low-wear friction lining material using hybrid mixture of burnt vehicle tyres, pulverized palm kernel shell (PKS), coconut (CS), iron brass filings obtained from the machine shop floor. The Taguchi method was used to determine optimum parameter settings obtain with low wear rate by exploring signal-to-noise ratios (S/N) smaller-the-b...

A sustainable, fast, feasible, and controlled approach is reported for the synthesis of silver nanoparticle (AgNP). The extract from natural ash plant (Fraxinus excelsior) flower was used as bio-based reducing stabilizing agent to synthesize AgNPs AgNO3 precursor. quantitative analysis AgNP performed by X-ray fluorescence (XRF) inductively coupled plasma optical emission spectroscopy (iCP-OES) ...

Samples of a naturally bioreduced, U-contaminated alluvial sediment were characterized with various microscopic and spectroscopic techniques and wet chemical extraction methods. The objective was to investigate U association and interaction with minerals of the sediment. Bioreduced sediment comprises approximately 10% of an alluvial aquifer adjacent to the Colorado River, in Rifle, CO, that was...

In this study, silica gel was extracted from rice husk ash using a modified acid-leaching process. The then characterized an X-ray Diffractometer (XRD) and Fluorescence (XRF). At different loadings of 0, 0.05 0.10 wt.%, used as cross-linker in the membrane formulation. Fourier Transform Infrared Spectroscopy (FTIR) Scanning Electron Microscopy (SEM) were to characterize membranes, while their p...

The present study was carried out on the effect of acid leaching on the modification and structure alteration of montmorillonite. A nanostructured, activated material was prepared by selective leaching of pure smectite clay with different concentrations of sulfuric acid (1 10 N/L) at 85 ̊C for 120 min using a solid/liquid ratio of 1:20 and a reflux system. The Fourier transform infrared (FTIR), ...

Bone lead measurements can assess long-term lead dosimetry because the residence time of lead in bone is long. Bone lead measurements thus complement blood and plasma lead measurements, which reflect more short-term exposure. Although the noninvasive, in vivo measurement of lead in bone by X-ray fluorescence (XRF) has been under development since the 1970s, its use is still largely confined to ...