The arsenic contained reagent was added to the cement raw meal to produce clinkers.Leaching test

sequential extraction procedures and SEM-EDS analysis were employed to evaluate the migration characteristics and the mineralogy change of arsenic during the sintering and hydration process.The results show the retention rate of arsenic during the sintering process is higher than 60%

while the content of arsenic in C3S

the major mineral phase in clinker was only 0.4%—0.6%.The SEM-EDS analysis of clinkers show arsenic has a strong dependent relationship with Fe.XRD analysis of clinkers showed the complex compounds with the chemical form of AsCrxFey or AsCrxVy were generated during the clinkerisation process

which were more stable under the high pH environment during the hydration process.Leaching test shows that the leaching concentration of arsenic has no considered increase compared to the blank samples.The BCR sequential extraction procedure analysis of the clinkers showed that the exchangeable water and acid-soluble phase of arsenic was only account for 0.01% of the total

while the easily reduced phase of arsenic had the biggest ratio

up to 39.35%.Finally

the residue fraction of arsenic accounts for 25.41% of the total

which show that the co-processing of high arsenic contained waste in the cement kiln has the potential environmental impact.