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We report here on a photo-Fenton process powered by concentrated sunlight applied for the treatment of surfactant-rich (5–20 g/L) industrial wastewaters. Degradation yields of 89% in 2 min in homogenous and 23% in 1 h for heterogenous conditions pave the way for the development of a low-cost/high-yield wastewater treatment process. Employed as a preliminary stage in wastewater treatment plants or as a small-scale stand-alone operated by small-medium enterprises, it could reduce the environmental and economic impact of wastewaters. [ABSTRACT FROM AUTHOR]

This study investigated the impact of the 9/11 attacks on substance use in Chicago, Illinois. The study design was a cross-sectional, audio-computer-assisted self-interview survey conducted in 2001 and 2002. Biological samples were also collected for toxicological analyses. Using a multistage area probability design, residents between the ages of 18 and 40 years were randomly selected. Compared to pre-9/11 interviewees, post-9/11 interviewees showed significantly less self-reported marijuana use, marijuana use per test results, and cocaine use per test results. Law enforcement and social-structural explanations for the findings are discussed. [ABSTRACT FROM AUTHOR]

To better understand and control the spread of sexually transmitted diseases among high-risk youth, we must first acquire reliable reports of sexual risk behavior. This study evaluates one potential method for validating such reports. We examined the association between marijuana and cocaine use reporting patterns and the number of reported recent sexual partners in a sample of juvenile arrestees/detainees. Using urinalysis to validate self-reported drug use, we categorized drug use reporting patterns into four groups: overreporters, underreporters, honest users, and honest nonusers. Analyses showed, in general, that overreporters reported more sexual partners than either underreporters or accurate reporters, suggesting that overreporters of drug use may also exaggerate sex partner reports. Findings suggest a new method for validating self-reported sexual behavior and provide a challenge to theories of juvenile delinquency. [ABSTRACT FROM AUTHOR]

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