Air pollutants emission inventory from commercial ships of Tianjin Harbor

The air pollutants emissions from the marine engines have become a significant contributor to atmospheric environment in harbor.However,the few researches have been conducted on this field in China.In this paper,the emission level of main pollutants from the ships in Tianjin harbor is investigated firstly,and then the emission factors of four pollutants(NOx,HC,CO,and PM10,) are confirmed.According to the method based on fuel consumption,NOx,HC,CO and PM10 emissions from the commercial ships of Tianjin harbor in 2006 are estimated.In addition,based on the related data,those in Tianjin harbor in 2010 and 2020 are forecasted.The results of the emission inventory will provide references for establishing relevant standards and control measures.