英文摘要 |
The scope of this project includes: 1) Establishing and updating of the emission inventory; 2) Monitoring for the stationary emission and the ambient environment; 3) Providing counseling to emission reduction; 4) Assisting the control, reduction and emergency response of dioxins and heavy metal emission.
1) Establishing and updating of the emission inventory
The total dioxin emission quantity in Taiwan is estimated to be 54.645(±8%) g I-TEQ/year in 2014. As for the heavy metal emissions in 2014, the total lead emission is about 14.144(±9.7%) metric tons/year, cadmium emission is 0.834(±3.9%) metric tons/year, mercury emission is 1.827(±3.5%) metric tons/year, and arsenic emission is 3.786(±6.0%) metric tons/year.
2) Monitoring for the stationary emission and the ambient environment
Complete dioxin emission monitoring for catalyst restructuring and secondary lead processing. Complete heavy metal emission monitoring for incinerators, secondary lead processing, sintering furnace, semiconductor and optoelectronics industry. These results can be used as emission factors for estimating dioxin and heavy metals emission inventory.
This year the ambient dioxin monitoring is targeted on the general monitoring stations, traffic monitoring stations and monitoring stations around major sources. The monitored concentration of dioxin in February, May, August and October 2015 is 0.077 pg I-TEQ/m3 (0.068 pg WHO2005DF-TEQ/m3), 0.038 pg I-TEQ/m3 (0.033 pg WHO2005DF-TEQ/m3), 0.026 pg I-TEQ/m3 (0.023 pg WHO2005DF-TEQ/m3) and 0.031 pg I-TEQ/m3 (0.027 pg WHO2005DF- TEQ/m3). The monitored concentration of PCBs in February, May, August and October 2015 is 0.005 pg WHO2005-TEQ/m3, 0.004 pg WHO2005-TEQ/m3, 0.004 pg WHO2005-TEQ/m3, 0.003 pg WHO2005- TEQ/m3.
The monitoring of ambient heavy metal showed that the average concentrations of lead, cadmium, nickel and selenium didn’t rise comparing to last year. These results are all under the ambient air quality standards published by EU. Higher concentration of chromium(VI) was discovered around the Suao factory of the Taiwan Cement Corporation, which might be originated from its raw material, magnesia-chrome refractory bricks or chromium steel balls.
3) Providing counseling to emission reduction
This year 8 counseling services were provided to factories that exceed the dioxins or heavy metal emission limits.
4) Control and reduction of dioxins and heavy metal emission
To reduce the controversy regarding the correction of concentration to reference oxygen content, changes to the dioxin emission standards was proposed. This year new emission standards for cement kilns were also proposed, lowering the mercury emission limit. And to revise Oxygen contents for some stationary sources,the new dioxin standards for stationary sources will propose.
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