Risk perception about education-research institute and improvement of reliability on relevant information

这项研究加深了人们对教育和研究中使用的化学品对环境和工人影响的理解。化学品综合控制系统PRRR要求进行的物质平衡研究包括对液体废物和废水进行调查，结果显示，氯仿等挥发性化合物可能排放到大气中的比例高达40%。为了最大限度地减少蒸发收集过程中的挥发损失，常压冷凝器被证明是有效的。除正常作业区调查外，还通过峰值浓度监测对作业人员的健康影响进行评估，发现相对较高的浓度经常超过10-4危险水平。然而，风险应该取决于暴露的时间和浓度。风险估计采用期望寿命损失率的直角近似法，证明吸烟相当于吸入267 mg/m~3的苯。

The study developed the understanding of the effect of chemicals used in education and research on the environment and workers. The mass balance study required by PRTR, the system for overall chemicals control, involved survey on the liquid waste and waste effluents, which revealed that volatile compounds such as chloroform were possibly emitted to atmosphere as much as 40 %. In order to minimize the volatile loss during evaporation-collection procedure, the cold trap at atmospheric pressure was proved to be efficient. The health effect on workers were assessed by peak concentration monitoring in addition to normal working area survey, which found frequently relative high concentration exceeding 10-4 risk level. However, the risk should depends on the exposure period as well as the concentration. The risk estimation was facilitated by loss of life expectancy rate with a rectangular approximation method, which proved tobacco smoking is equivalent with benzene inhalation at the concentration of 267 mg/m3.