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[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。
[Objective] The research aimed to discuss the existence and bioavailability of vanadium in soil and mineral in Panzhihua area. [Method] The collected Xigeda soil and vanadium-titanium magnetite in the farmland of Xigeda soil and mine in Panzhihua were collected to determine the existence of vanadium in soil and minerals. The in vitro biomimetic digestion model was established by invitro method, The bioavailability of vanadium in three samples was studied. [Result] The contents of vanadium in soil and minerals in gastric juice were 5.02, 9.50 and 3.88 mg / kg respectively, the bioavailability was 0.09% -3.00%. The contents of dissolved vanadium in intestinal juice were 2.98 and 5.43 And 4.49 mg / kg respectively, and the bioavailability was 0.10% -1.78%. The content of vanadium in various forms was significantly different. The contents of non-specifically adsorbed vanadium and specifically adsorbed vanadium were very low while the residual vanadium content was very low High, accounting for 75.06%, 95.32% and 86.27% of the total vanadium content of the samples, respectively. [Conclusion] The bioavailability of vanadium in the stomach is higher than that of vanadium in the small intestine, which is mainly related to the pH value of gastric juice being much lower than the pH value of small intestinal fluid. It is difficult for vanadium in soil and minerals to take shape Of the transformation and migration, which is the main reason for low bioavailability of the sample.