This study explores the use of Adolescent Problems and Risk Behaviours Inventory (IPERI) to predict the relationship of personal problems on risky behaviour among adolescence aged 14 to 17. The objective of this research is to analyse the influence of personal problems such as study problems, family support, financial problems, career indecision, peer influence, spiritual management and health condition on the development of risky behaviours among adolescents. The risky behaviours comprise of eight (8) behaviours which include discipline problems, physical bulling, suicidal thoughts, free sex, tobacco consumption, alcohol abuse, drug abuse and media influence. A survey using Adolescent Problems and Risk Behaviours Inventory (IPERI) is administered to three hundred and seventy-nine (379) respondents, age between 14 to 17. The analysis of Pearson Correlation Coefficient and Standard Multiple Regression showed the existence of significance between all the problem variables, study problems (r = .316), family support (r = .256), financial problems (r = .240), health condition (r = .134), peer influence (r = .189), career indecision (r = .185) and spiritual management (r = .242), with the risky behaviour variables. This research contributes to the profiling of adolescents’ risky behaviours which can guide the development of interventions in tackling adolescent’s risky behaviours.
Since landfilling is the common method of waste disposal in Malaysia, river water is greatly exposed to the risk of contamination from leachate unless proper leachate management is carried out. In this study, leachates from three different types of landfills, namely active uncontrolled, active controlled and closed controlled, were characterized, and their relationships with river water chemistry were examined monthly for a year. The influence of leachate on river water chemistry from each type of landfill depended on many factors, including the presence of a leachate control mechanism, leachate characteristics, precipitation, surface runoff and the applied treatment. The impact of leachate from an active uncontrolled landfill was the highest, as the organic content, NH(4)(+)-N, Cd and Mn levels appeared high in the river. At the same time, influences of leachate were also observed from both types of controlled landfills in the form of inorganic nitrogen (NH(4)(+)-N, NO(3)(-)-N and NO(2)(-)-N) and heavy metals (Fe, Cr, Ni and Mn). Improper treatment practice led to high levels of some contaminants in the stream near the closed controlled landfill. Meanwhile, the active controlled landfill, which was located near the coastline, was exposed to the risk of contamination resulting from the pyrite oxidation of the surrounding area.