CAJ | 학술논문

在赣南稀土高背景区和稀土低背景区不同地质环境脐橙果同,系统采集岩、土、脐橙植物样,用ICP-MS法测定样品中15种稀土元素的含量,并对稀土元素在岩石、土壤和脐橙植物体内的分布、迁移、累积特征进行了研究.结果表明:a.基岩的稀土元素含量影响(决定)土壤各层位的稀土元素含量;b.土壤环境中稀土元素含量高低直接影响脐橙植物体稀土元素含量,但不完全成正比;c.基岩的稀土元素配分模式基本上贯穿土壤各层位、脐橙植物体各器官;d.岩、土、脐橙三大环节稀土无素的百分含量,总的趋势是轻稀土比重逐渐增高,重稀土比重逐渐降低,但重稀土在脐橙植物体末稍器官比例有所增加;e.岩土脐橙生态系统立体刮面中,稀土元素的垂直方向运动呈向量关系;f.由于土壤-植物壁垒作用和脐橙植物体自身的选择性吸收、控制性积累功能,高、低稀土背景区脐橙果肉的稀土含量均低于国家食品卫生限量标准.
재공남희토고배경구화희토저배경구불동지질배경제등과동,계통채집암、토、제등식물양,용ICP-MS법측정양품중15충희토원소적함량,병대희토원소재암석、토양화제등식물체내적분포、천이、루적특정진행료연구.결과표명:a.기암적희토원소함량영향(결정)토양각층위적희토원소함량;b.토양배경중희토원소함량고저직접영향제등식물체희토원소함량,단불완전성정비;c.기암적희토원소배분모식기본상관천토양각층위、제등식물체각기관;d.암、토、제등삼대배절희토무소적백분함량,총적추세시경희토비중축점증고,중희토비중축점강저,단중희토재제등식물체말초기관비례유소증가;e.암토제등생태계통입체괄면중,희토원소적수직방향운동정향량관계;f.유우토양-식물벽루작용화제등식물체자신적선택성흡수、공제성적루공능,고、저희토배경구제등과육적희토함량균저우국가식품위생한량표준.
Samples of rocks, soils and navel orange trees were taken systematically in several orchards located in different geological conditions characterized by rich or poor REE in southern Jiangxi Province. The contents of 15 rare earth elements in these samples were measured by using the method of ICP-MS, and the distribution, migration and accumulation of REE in rocks, soils and navel orange plants were studied. Some conclusions have been reached: a. The content of REE in the bedrock affects or decides the content of REE in all layers; b. The content of REE in soil directly affects the content of REE in navel orange plants; nevertheless, they are sometimes not in a direct proportion with each other; c. The distribution pattern of REE in bedrock seems to be the same in every layer of the soil and in all organs of the navel orange plants; d. General trend of the percentage content of REE in rock, soil and navel orange plants is that the proportion of the light REE increases gradually and that of the heavy REE decreases gradually. However, the percentage content of the heavy REE somewhat increases in the peripheral organs of navel orange plants; e. In the three-dimensional profile of the rock-soil-navel orange system, the vertical direction of movement of the REE assumes the relationship between vectors, f. The content of REE in navel orange flesh is lower than the limitation standard stipulated by national food and health regulations.