Two polymeric resins, Polymal and Hetron, were evaluated to solidify/stabilize (S/S) for ultimate disposal brake lining dust containing asbestos. This dust was generated as part of a sequence of processing steps in the manufacture of automobile brake linings. The mean grain size of the lining dust for disposal was 298.2 m m, the range being from 24.9 to 567.3 m m. Based on the Toxicity Characte...

The large production volume combined with the high lignocellulose content makes elephant dung an attractive and underutilized biomass resource, but also presents waste management problems for orphanages. This study explored conversion of into biochars by slow pyrolysis at 500°C recovery phosphate. unmodified biochar (BC500) had a specific surface area (SBET) 62.5 m2×g-1 point zero charge (pHPZC...

Purpose. Attapulgite was modified by sodium dihydrogen phosphate, oxalic acid-activated phosphate rock powder, potassium calcium superphosphate, ammonium and fused calcium-magnesium used in the remediation of Cd, Zn, Ni. Materials Methods. six kinds (ratio: 1 : 2), improvement effect passivation material on soil polluted cadmium, zinc, nickel determined. CaCl2-extractable toxicity characteristi...

A method in combination of acid leaching, chemical exchange and ferrite process was applied to recycle copper and confer higher chemical stability to the sludge generated from etching process in printed circuit board industry. Ninety-five percent copper could be recycled in the form of powder from the sludge. Moreover, not only the wastewater after chemical exchange can be treated to fulfill th...

Ingestion of soil represents one the critical exposure pathways in human health risk assessment (HHRA) framework at sites contaminated by inorganic species, especially for residential scenarios. HHRA is typically carried out through starting from so-called “total concentration”, which estimated fraction species extracted using standardized approaches, i.e., microwave acid extraction. Due to mil...

The objective of the study was to estimate how water treatment (stimulation of real conditions) by H2O2 and/or UV affects carbon nanotube (CNT) properties and fate (stability/aggregation) in water and tannic acid solution. The processes studied had only a slight effect on SBET, porosity, and surface composition of CNTs. There was a change in the morphology of CNTs. After H2O2 and/or UV treatmen...

Ceria-based gold catalysts were successfully deposited on ferritic stainless steel (Fecralloy) and aluminium monoliths. The prepared monolithic and reference powder catalysts were characterized by means of SBET, X-ray diffraction, glow discharge optical emission spectroscopy and scanning electron microscopy–energy dispersive X-ray analysis techniques and tested in the CO oxidation reaction. Cha...

[email protected] spheres with a structure were synthesized and thermally annealed at 800 ºC to obtain (SiO2@CSs). The silica core was removed by etching NaOH, hollow carbon (CSs) being obtained. particle size of SiO2@CSs CSs increased the ethanol/water (E/W) volumetric ratio (2, 4.5, 7) employed in first synthesis step (i.e., Stöber's method particles). Moreover, average diameter materials pre...

Passiflora nitida Kunth, an Amazonian species, is little studied, although the specie’s high biological potential. Herein plant’s pharmacognostic characterization, extract production, antioxidant potential evaluation, and application of this in cosmetic products reported. The physical chemical parameters analyzed were particle size by sieve analysis, loss through drying, extractive yield, total...