Environmental Assessment of Atmospheric Dioxin Dispersion from a Municipal Wastes Power Plant, Indonesia

We assess of environemental effect of the dioxin dispersion from municipal waste power plant (MWPP) covering, characteristic of the dispersion and health risk affected communities in Indonesia. The dispersion studies through modeling which is done with the following steps 1 ) estimate dioxin emissions from incinerator processing, 2 ) design the dioxin dispersion by literature review, 3 ) calculate health risk of communities based on the dispersion modeling. The results show that the dispersion of dioxin is represented in the form of a non-Gaussian solution of the advection-diffusion equation with taking into account the settling and deposition velocity. In the case of MWPP with capacity, 80 tonnes per day produce a concentration of 0.04 pg TEQ/Nm3 in residential areas which are located 200m from chimney. Inhalation exposure resulting is 5.28 pg 1-TEQ/( kg-day ) to adults and 6.95 pg 1-TEQ/( kg-day ) to children. The strategy took to adjust by WHO environmental quality standard 4 pg 1-TEQ /( kg-day ), we increase the reduction of APC 25%. The calculation of emissions based on combustion processes shows that the dioxin concentration of MWPP is still below the threshold required by WHO.

PCDD/FS LEVEL IN HUMAN ADIPOSE TISSUE OF BIENHOA RESIDENTS IN COMPARISON WITH DEVELOPED INDUSTRIAL COUNTRIES

Dioxin exhibits serious health effects when it reaches as concentration a few ppt in human body fat. Dioxin is a powerful hormone disrupting chemical. By binding to a cell's hormone receptor, it literally modifies the functioning and genetic mechanism of the cell, causing a wide range of effects, from cancer to reduced immunity, nervous system disorders, miscarriages and birth deformity. Median i-TEQ in adipose tissue of the BienHoa residents is comparable with that of the developed countries while mean i-TEQ of the Bien Hoa residents is higher in both groups, especially older people group. This group has some exceptional cases with i-TEQ value up to 1148.7pg/g. The i-TEQ value in our studies is higher than that conducted by other studies. However, our result supports a conclusion: at present, the dioxin concentration in natural environment and human bodies in Southern Vietnam is only a residue and not higher than that in developed countries.