Abstract：
:Dioxins generated by iron and steel industry account for the majority of industrial dioxins emissions. This study compares the performance of different additives (including calcium sulphate dehydrate CaSO4·2H2O; calcium polysulphide CaSx; ammonium sulphate (NH4)2SO4; 4-methylthiosemicarbazide H3C-SC(NH)2NH2 and thiourea H2NCSNH2) as suppressant of chlorinated aromatics in iron ore sintering. The formation of chlorobenzenes (CBz) and polychlorinated biphenyls (PCBs), used as surrogates for dioxins, was suppressed significantly in the present of various inhibitors (1 wt%) except for CaSO4·2H2O. Moreover, a larger molar ratio of (S + N)/Cl leads to a higher suppression efficiency, so that the inhibition capacity of (NH4)2SO4 on both CBz and PCBs was weaker than H2NCSNH2. The generation of dioxin-like PCBs (Co- or dl-PCB) was also analysed.
journal_name
Chemospherejournal_title
Chemosphereauthors
Zhang Y,Buekens A,Liu L,Zhang Y,Zeng X,Sun Ydoi
10.1016/j.chemosphere.2016.04.065subject
Has Abstractpub_date
2016-07-01 00:00:00pages
300-307eissn
0045-6535issn
1879-1298pii
S0045-6535(16)30539-2journal_volume
155pub_type
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