Bleach, nitrite, chromate, and hydrogen peroxide-peroxidase are effective urine adulterants used by the illicit drug users to conceal marijuana-positive results. Methods for detecting nitrite and chromate are available. Effects of other oxidizing agents that could possibly be used as adulterants and are difficult to detect or measure are presented in this report. Urine samples containing 40 ng/...

Heat-activated persulfate was tested for destruction of polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) in the laboratory. Combined technology of in situ chemical oxidation (ISCO) and in situ thermal remediation (ISTR) using heat-activated persulfate can be applied for destruction of the PCDD/Fs polluted soil and the PCDD/Fs containing fly ash from incineration process. To explore the treata...

The impact of chemical on the native microbial population during in situ chemical oxidation (ISCO) is not well understood. As a result, some concerns exist within the remediation community as to the potential of negative impacts ISCO may have on bioremediation processes, especially its impact on down-gradient plume control via bioremediation and its impact on subsequent natural attenuation proc...

The mechanical properties of regenerated collagen composite materials are use in diverse applications. However, there few efficient strategies to enhance the fibers. Herein, oxidized cellulose nanocrystals (oCNCs) were successfully prepared aqueous media via oxidation hydroxyl groups on surface (CNCs) using ammonium persulfate (APS) as an oxidant. Collagen fibers then by introducing oCNCs into ...

Aqueous emulsion acrylic adhesive was prepared by batch polymerization With 2-ethylhexyl acrylate (2-EHA) and butyl (BA) as soft monomers, methyl methacrylate (MMA) hard monomer, acid (AA), amide (AM) hydroxyethyl (HEA) hydrophilic functional dodecanethiol (NDM) molecular weight regulator, Sodium dodecyl benzene sulfonate (SDBS) octyl phenol polyoxyethylene ether (op-10) mixed emulsifiers, ammo...

ENVIRONMENTAL APPLICATIONS OF PERSULFATE: REMEDIATION CONTAMINATED GROUNDWATER AND SOILS. Environmental remediation represents a major technological challenge due to the complexity of environmental matrices and high treatment cost. In recent years, in situ chemical oxidation technologies (ISCO) have shown good cost/benefit ratio, which as favored their use degradation several relevant pollutant...

Determination of total nitrogen in aqueous samples after potassium persulfate digestion compared favorably in both precision and nitrogen recovery with determinations obtained using Kjeldahl digestion. The determination of total nitrogen (TN = inorganic and organic fixed nitrogen) has largely depended either on acid Kjeldahl digestion ( cf. Strickland and Parsons 1972) or on photo-oxidation (Ar...

Zero-valent iron [Fe(0)]-biochar composites, namely, Fe(0)-included biochar and biochar-coated Fe(0), were synthesized their catalytic performance in the activation of persulfate for phenol degradation water was evaluated. In presence Fe(0)-biochar biochar-persulfate Fe(0)-persulfate systems showed higher removal than a system by 11.6% 20.7%, respectively. The difference between Fe(0) because h...