Characterization of mechanochemically synthesized lead selenide (original) (raw)

Investigation of Selenium Recovery on Oxidizing Roasting of “Bio-Selenium&rdquo

Journal of the Japan Institute of Metals, 2015

We have developed a method for recycling selenium from Se containing wastewater using the selenium oxyanion reducing aerobic bacterium Pseudomonas stutzeri NT . The treatment of Se containing wastewater with the NT  strain provided bio selenium, which is mainly composed of organic matter and 11 14 mass of Se. In the present study, we investigated the recovery of Se from bio selenium by oxidizing roasting and chemical reduction. After thermodynamic calculations were performed to estimate the oxidation behavior during the roasting process, roasting experiments were conducted on bio selenium under varying roasting conditions. The selenium in bio selenium was recovered in the form of solid SeO 2 with a purity of 99 in a maximum yield of 97 after roasting at 700°C. Furthermore, the chemical reduction of SeO 2 to Se was carried out, and metallic Se with a purity of 99 (based on metal) was obtained.

Analysis of synthetic approaches described in papers of the journal Synthesiology

Synthesiology, 2012

Analysis of synthetic approaches described in papers of the journal Synthesiology-Towards establishing synthesiological methodology for bridging the gap between scientific research results and society-The methodology of synthesis has been studied by analyzing 70 papers published in the academic journal, Synthesiology, launched in 2008. As a result, it has been found that each technological field has its distinctive features, e.g. there are many breakthrough type syntheses in biotechnology and nanotechnology, and the strategic selection types are commonly observed in the metrology and measurement field. In addition, we have found a common synthetic method as a whole. A kind of methodology called "technological synthesis" has been found to be important in the Full Research, and continuous follow-up process called "synthesis for social introduction" is also found to be one of the features to introduce the research results to society. Both the former and the latter involve feedback processes, and moreover, in the latter case, a dynamic synthetic method that can be called a spiral-up process is observed, where many feedback processes are repeated successively through social trials.