Distribution and mobility of arsenic species in solids and leachate composts

Because arsenic can exist in toxic and non-toxic forms, it is important to identify them in compost. This organic material prepared from urban and agricultural wastes, is often used for recovering or remedying soils. As a matter of fact, it’s important to control the mobility of arsenic and its different forms present in leachate composts. In this work total arsenic was determined in compost samples, previously submitted to acid digestion using Inductively Coupled Plasma Mass Spectroscopy (ICP–MS). Total inorganic arsenic and As(III) results were compared with those directly determined in solids samples by Square Wave Voltammetry (SWV). It was found that two thirds of arsenic present in solids are in inorganic forms. As(III) is a minor component in the solid, detectable only in agricultural composts. In leachates, the inorganic arsenic was mobilized in his majority as As(III)

Ano yun? : an experimental study on the influence of an open and closed environment on an individual\u27s curiosity

This study focused on two variables among students of DLSU-Manila: curiosity and environment. There is one question asked in relation to these variables: Will a closed environment increase the curiosity level of an individual? Independent samples T-test analysis was used to analyze the data coming from 92 participants divided equally into two groups: closed and open. The results of the data show that there is a significant difference between the shock pen clicks of the open and closed environment with a p-value of (p\u3c0.0001, a=0.05). Results showed that a closed environment includes more shock pen clicks than an open environment. The implication of this study is that a closed environment induces curiosity more than an open environment. This information can be utilized in education institutions and workplace environments to foster creative learning and increase and creative thinking, through curiosity