Desorption characteristics of waste activated carbons collected from chemicals manufacturing industries in Shiwha/Banwal industrial complex were investigated. Activated carbons were decomposed in a thermogravimetric analyzer (TGA) at 513K with heating rate of 10 ℃/min under nitrogen atmosphere. Activation energies and reaction orders for desorption, from the waste activated carbon were estimated by employing Friedman method and Freeman-Carroll method. It was found that the reaction orders of desorption in waste activated carbons were 0.27-1.69, and activation energies were 15.2-45.7 kJ/mol in Friedman method and 13.7-17.1 kJ/mol in Freeman-Carroll method.

when adopting and implementing GHS system in Korea and to draft the revision proposal for Industrial Safety and Health Act taking into account of unique domestic situation. The research method is to conduct a survey for 2 month period from early April to late May in 2006 to 830 randomly selected chemical manufacturing, importing and exporting, and consumption companies out of all the companies surveyed by the Ministry of Labor under 2004 Work Environment Status National Survey. A total of 610 survey was collected and analyzed. The results of this thesis is summarized as follows , First, based on the survey analysis it is vital to conduct a national PR using pamphlet, internet, and daily newspaper and to provide technical assistance such as training expert and publishing GHS manual by expert organization such as Korea Occupational Safety and Health Agency (KOSHA) for early settlement of GHS in Korea. Second, it is also needed to give a grace period of 1 to 2 years to minimize the dramatic impact for industry, to encourage the establishment of the GHS team utilizing safety managers within companies, and to develop and distribute the standard GHS software by government. Third, taking into account of difficult situation of small companies, KOSHA needs to provide a full technical and financial support for companies with less than 100 employees and especially for chemical manufacturing companies. Fourth, it is also needed to operate an Interministrial GHS Committee (IGC) involving 7 related ministries for smooth GHS implementation and to develop an infra by sharing responsibilities among related ministries and establishing internationally recognized organization for hazard classification, labelling, and MSDS.

In this study, the removal efficiency of 24 odorous compounds was measured in diverse control process units of 7 individual chemical companies located in Ban-Wall & Shi-Wha Industrial Complex in Gyeonggi-do, Korea from March to August, 2007. To quantify the removal efficiency rates of major odorous compounds, we collected odor samples from the inside process and both the front and rear side of 7 control process units. As the results of this study, it was shown that toluene, ammonia, trimethylamine (TMA) and acetaldehyde were dominant odorous compounds in the inside process. In addition, VOCs, TMA and acetaldehyde were also detected at higher concentrations in the stacks and 10 (toluene, acetone, ethyl benzene, xylene etc.) out of 24 index compounds were found to have negative removal efficiencies. According to the removal efficiency evaluation of seven odor control facilities, a company equipped with two connected absorption processes was shown to have positive (＋) removal efficiencies for 16 odor substances and NH₃, TMA, acetaldehyde, the priority odor substances, which meant the proper control system was installed and operated. Hence, to obtain best removal efficiency of odorous pollutant emission, the database on source characteristics and the development of management techniques of diverse control process units are continually needed.