The pollution control of fluorine and arsenic in roasted corn in "coal-burning" fluorosis area Yunnan, China.
Pilot experiments were carried out to reduce the fluorine (F) and arsenic (As) pollution of roasted corn dried by open ovens in "coal-burning" fluorosis area Yunnan, China. The results indicated that the average emission amount of F and As in briquettes in experimental group were 29.20mg/kg and 0.76 mg/kg in Xiaolongdong, and 46.8 mg/kg and 0.54 mg/kg in Mangbu respectively. The results also indicated that the fixing rate of F and As in briquettes in experimental group was more than 4 times and 1.2 times of that in control group respectively. The average concentration of F and As in roasted corn in experimental group were 3.86 mg/kg and 13.23 μg/kg in Xiaolongdong, and 4.77 mg/kg and 122.96 μg/kg in Mangbu respectively, which reduced by more than 65% and 75% respectively compared with that in control group. Adding local natural calcium-based materials in briquettes can reduce the emission of F and As and their pollution on roasted corn largely, and thus will reduce the risk of fluorosis for residents greatly in "coal-burning" fluorosis area of southwestern China.
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Beijing 100101, China.
Ling
L
Li
Kun-li
KL
Luo
Yong-lin
YL
Liu
Yong-xin
YX
Xu
D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D016902:Air Pollution, Indoor / Q000032:analysis / Q000517:prevention & control*; D000538:Aluminum Silicates / Q000737:chemistry; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D002681:China; D000077215:Clay; D003031:Coal; D005461:Fluorine / Q000032:analysis* / Q000737:chemistry; D009050:Fluorosis, Dental / Q000517:prevention & control; D005506:Food Contamination / Q000517:prevention & control*; D006801:Humans; D003313:Zea mays
D000393:Air Pollutants; D000538:Aluminum Silicates; D003031:Coal; D005461:Fluorine; D001151:Arsenic; D000077215:Clay