CAJ | 학술논문

[目的]探讨攀枝花地区土壤及矿物中钒的存在形态和生物可给性。[方法]采集攀枝花地区具有代表性的农田昔格达土、矿山受污染的昔格达土和钒钛磁铁矿,测定土壤及矿物中钒的存在形态;采用invitro方法建立体外仿生消化模型,对3种样品中钒的生物可给性进行研究。[结果]土壤及矿物中的钒在胃液中的溶解态含量分别为5.02、9.50和3.88mg/kg,生物可给性为0.09%～3.00%;肠液中钒的溶解态含量分别为2.98、5.43和4.49mg/kg,生物可给性为0.10%～1.78%;各种形态的钒含量差异显著,非专性吸附态钒和专性吸附态钒的含量均很低,而残渣态钒含量很高,分别占样品总钒含量的75.06%、95.32%和86.27%。[结论]胃中钒的生物可给性高于小肠中钒的生物可给性,这主要是与胃液的pH值远低于小肠液的pH值有关;土壤及矿物中的钒很难发生形态的转化与迁移,这是样品生物可给性低的主要原因。
[목적]탐토반지화지구토양급광물중범적존재형태화생물가급성。[방법]채집반지화지구구유대표성적농전석격체토、광산수오염적석격체토화범태자철광,측정토양급광물중범적존재형태;채용invitro방법건입체외방생소화모형,대3충양품중범적생물가급성진행연구。[결과]토양급광물중적범재위액중적용해태함량분별위5.02、9.50화3.88mg/kg,생물가급성위0.09%～3.00%;장액중범적용해태함량분별위2.98、5.43화4.49mg/kg,생물가급성위0.10%～1.78%;각충형태적범함량차이현저,비전성흡부태범화전성흡부태범적함량균흔저,이잔사태범함량흔고,분별점양품총범함량적75.06%、95.32%화86.27%。[결론]위중범적생물가급성고우소장중범적생물가급성,저주요시여위액적pH치원저우소장액적pH치유관;토양급광물중적범흔난발생형태적전화여천이,저시양품생물가급성저적주요원인。
[Objective] This study aimed to investigate the existing forms and bioaccessibility of vanadium(V) from soil and mineral of Panzhihua region.[Method] The representative Xigeda soil and vanadium-titanium magnetite were collected from Panzhihua region to determine the existing forms of vanadium from soil and mineral;in vitro bionic digestion model was established to measure the bioaccessibility of vanadium.[Result] The dissolved concentrations of vanadium from farmland,mining area and vanadium-titanium magnetite in gastric juice were respectively 5.02,9.50 and 3.88 mg/kg,and the bioaccessibility ranged from 0.09% to 3.00%;the dissolved concentrations of vanadium in intestinal juice were respectively 2.98,5.43 and 4.49 mg/kg,and the bioaccessibility ranged from 0.10% to 1.78%.The content of vanadium in various existing forms varied significantly,the contents of vanadium in non-specific adsorption state and specific adsorption state were low,but residual content was completely high,which accounted for 75.06%,95.32% and 86.27% of the total content of vanadium in samples.[Conclusion] Bioaccessibility of dissolved vanadium in gastric juice was higher than that in small intestinal juice.Vanadium from soil and mineral was difficult to generate morphological transformation and migration,which was the main reason for low bioaccessibility.