CAJ | 학술논문

通过室内静态吸附和盆栽实验，以新疆干旱区某石化污水库周边农田土为研究对象，考察了没食子酸(GA)、EDTA、柠檬酸（CA）对土壤中镉(Cd)的形态分布及Cd在紫花苜蓿中迁移规律的影响．结果表明：(1)在螯合剂考察浓度范围内(0～15 mmol/kg），三种螯合剂的投加均可提升水溶态Cd含量，且EDTA为15.0 mmol/kg时，水溶态Cd含量达到最大值；与对照相比，三种螯合剂均可提升可交换态Cd含量，但增幅差异不大．（2）投加（0～1.0 mmol/kg）螯合剂可显著提升Cd在紫花苜蓿中的富集量．其中，三种螯合剂对紫花苜蓿根、茎中Cd富集量的提升作用大小顺序为EDTA>GA>CA；与EDTA、CA相比，投加1.0 mmol/kg GA时，紫花苜蓿叶中Cd的富集量具有较大值．(3)通过比较转运系数表明，在供试土壤中投加0.25 mmol/kg GA时，Cd在紫花苜蓿中具有较好的转运能力，转运系数大小顺序为：GA>CA>EDTA.
통과실내정태흡부화분재실험，이신강간한구모석화오수고주변농전토위연구대상，고찰료몰식자산(GA)、EDTA、저몽산（CA）대토양중력(Cd)적형태분포급Cd재자화목숙중천이규률적영향．결과표명：(1)재오합제고찰농도범위내(0～15 mmol/kg），삼충오합제적투가균가제승수용태Cd함량，차EDTA위15.0 mmol/kg시，수용태Cd함량체도최대치；여대조상비，삼충오합제균가제승가교환태Cd함량，단증폭차이불대．（2）투가（0～1.0 mmol/kg）오합제가현저제승Cd재자화목숙중적부집량．기중，삼충오합제대자화목숙근、경중Cd부집량적제승작용대소순서위EDTA>GA>CA；여EDTA、CA상비，투가1.0 mmol/kg GA시，자화목숙협중Cd적부집량구유교대치．(3)통과비교전운계수표명，재공시토양중투가0.25 mmol/kg GA시，Cd재자화목숙중구유교호적전운능력，전운계수대소순서위：GA>CA>EDTA.
The effects of agents at levels 0-15 mmol/kg on various forms scale of cadium in soils was discussed by static adsorption and accumulation from alfalfa was analyzed by pot experiments,which soils collected from arid zoon around petrochemical waste-water reclaimed in Xinjiang .Results showed that:(1) When exogenous agents ranged concentration was 0-15 mmol/kg ,the percentage of water-soluble Cd in soils changed regularly and reached climax when EDTA at level of 15.0 mmol/kg ; contrasted with the blank, percentage of exchangeable Cd were increased slightly when agents increased .(2)Enrichment of Cd were increased greatly when agents at levels 0-1.0 mmol/kg, the promoting effect from agents was contrasted with EDTA> GA> CA in alfalfa root and stem,the significance of the effect from agents was contrasted with GA > EDTA >CA in alfalfa leaf .(3)In general,enrichment coe?cients in alfalfa was promoted by three agents. Transformation rate of Cd in alfalfa was reached the maximum values when 0.25 mmol/kg GA added in soils and contrasted with GA>CA>EDTA.