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1、第47卷第2期吉林大學(xué)學(xué)報(bào)(理學(xué)版)Vo1.47No.22009年3月JournalofJilinUniversity(ScienceEdition)Mar2009蘋果酸和丁二酸對(duì)茶園土壤氟吸附能力及形態(tài)分布的影響謝忠雷,孫文田,郭平,郭曉靜,高福民(吉林大學(xué)環(huán)境與資源學(xué)院,長(zhǎng)春130012)摘要:通過茶園土壤采樣和實(shí)驗(yàn)室模擬,研究蘋果酸和丁二酸對(duì)茶園土壤外源氟吸附能力和形態(tài)分布的影響.在氟初始濃度較低的條件下(低濃度有機(jī)酸<0.42mmol/L,高濃度有機(jī)酸<2.1mmol/L),蘋果酸和丁二酸對(duì)茶園土壤氟的吸附有
2、一定的抑制作用;在氟初始濃度較高的條件下(低濃度有機(jī)酸>0.42mmol/L,高濃度有機(jī)酸>2.1mmol/L),蘋果酸和丁二酸對(duì)茶園土壤氟的吸附有增強(qiáng)作用,且增強(qiáng)作用隨吸附液氟初始濃度的增加而增大,蘋果酸比丁二酸的增強(qiáng)作用大.茶園土壤外源氟大部分以殘?jiān)鼞B(tài)存在,其次為水溶態(tài).不同濃度的蘋果酸和丁二酸對(duì)茶園土壤外源氟的形態(tài)轉(zhuǎn)化有不同影響,但外源氟進(jìn)入茶園土壤后形態(tài)分布的一般規(guī)律為:殘?jiān)鼞B(tài)>水溶態(tài)>有機(jī)態(tài)鐵錳態(tài)>交換態(tài).關(guān)鍵詞:茶園土壤;氟;蘋果酸;丁二酸;吸附能力;形態(tài)分布中圖分類號(hào):X142文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1
3、671.5489(2009)02-0392-05EfectsofMalicAcidandSuccinicAcidonSorptionandDistributionofFluorideinTeaGardenSoilXIEZhong—lei,SUNWen—tian,GUOPing,GUOXiao-jing,GAOFu—min(CollegeofEnvironmentandResources,JilinUniversity,Changchun130012,China)Abstract:Effectsofmalicacida
4、ndsuccinicacidonthesorptionanddistributionoffluorideinteagardensoilwasstudiedbythesamplingofteagardensoilandthesimulatedtesting.Thesorptioncapacityoffluoridebyteagardensoilwasdepressedtosomeextentinthepresenceofmalicacidandsuccinicacidwhentheinitialconcentratio
5、noffluoridewaslowerthan0.42mmol/Lforthelowconcentrationoftheorganicacidsand2.1mmol/Lforthehighconcentrationoftheorganicacids.Thedepressedfunctionofthetwoorganicaicdsforthesorptionoffluorideinteagardensoil,however,wasweakenedwhentheinitialconcentrationoffluoride
6、washigherthan0.42mmolfLforthelowconcentrationoftheorganicacidsand2.1mmol/Lforthehighconcentrationoftheorganicacids.Onthecontrary,therewasadistinctenhancingfunctionforthesorptioncapacityoffluorideinteagardensoilinthepresenceofthetwoorganicacidswithincreasingthei
7、nitialconcentrationoffluoride,andtheenhancingfunctionofmalicacidwaslargerthanthatofsuccinicacid.Theresidualspecieswasthemajorformandwatersolublespecieswassecondaryformforsorbedfluorideunderthecontroltreatmentandinthepresenceofmalicacidandsuccinicacid.Therewerea
8、lsodifferencesinthedistributionandtransformationofsorbedfluorideinteagardensoilinthepresenceofthedifferentorganicaicdsandtheirconcentrations.butthegenerMdistributionlawofsor