CAJ | 학술논문

通过温室盆栽试验.开展了凹凸棒土和钠基蒙脱石处理对铜锌镉污染红壤的改良效应研究.结果表明:添加凹凸棒土和钠基蒙脱石处理能显著增加黑麦草(Lolium multiflorum Lam)两茬的地上部生物量(鲜重).未施入改良剂时,两茬黑麦草地上部的生物量分别为是7.60 g/盆和5.67 g/盆,添加80 g/kg 凹凸棒土处理的两茬地上部生物量分别增加了184%和15%添加80 g/kg钠基蒙脱石处理的两茬地上部生物量分别增加了113%和99.3%.黏土矿物的加入使土壤的pH提高了0.26～1.02个单位.从而降低了植株对Cu、Zn、Cd的生物有效性.随着添加量从20 g/kg增加到80 g/kg,黑麦草地上部Cu、Zn、Cd的含量降低,钠基蒙脱石钝化Cu、Cd的效果好于凹凸棒土,但两者钝化Zn的效果没有显著差异性.添加40 g/kg和80 g/kg的凹凸棒土或钠基蒙脱石处理都显著降低了污染上壤TCLP提取液中Cu、Zn的浓度,对于TCLP提取液中Cd浓度的显著降低只有添加80 g/kg的凹凸棒上这一种处理达到.
통과온실분재시험.개전료요철봉토화납기몽탈석처리대동자력오염홍양적개량효응연구.결과표명:첨가요철봉토화납기몽탈석처리능현저증가흑맥초(Lolium multiflorum Lam)량치적지상부생물량(선중).미시입개량제시,량치흑맥초지상부적생물량분별위시7.60 g/분화5.67 g/분,첨가80 g/kg 요철봉토처리적량치지상부생물량분별증가료184%화15%첨가80 g/kg납기몽탈석처리적량치지상부생물량분별증가료113%화99.3%.점토광물적가입사토양적pH제고료0.26～1.02개단위.종이강저료식주대Cu、Zn、Cd적생물유효성.수착첨가량종20 g/kg증가도80 g/kg,흑맥초지상부Cu、Zn、Cd적함량강저,납기몽탈석둔화Cu、Cd적효과호우요철봉토,단량자둔화Zn적효과몰유현저차이성.첨가40 g/kg화80 g/kg적요철봉토혹납기몽탈석처리도현저강저료오염상양TCLP제취액중Cu、Zn적농도,대우TCLP제취액중Cd농도적현저강저지유첨가80 g/kg적요철봉상저일충처리체도.
The greenhouse pot experiment was conducted to investigate the modified effects of attapulgite and Na-Montmorillonite on Cu-Zn-Cd contaminated red soil. The results showed that the above-ground biomass of ryegrass (Lolium multiflorum Lain) of the two crops significantly increased with the application of the two kinds of clays. The fresh biomass of the two crops were 7.60 g/pot and 5.67 g/pot for the CK treatment respectively, and the biomass increased by 184% and 159% with the application of 80 g/kg attapulgite, and increased by 113% and 99.3% with the application of 80 g/kg Na-Montmorillonite. Application of the two clays increased soil pH value from 0.26 units to 1.02 units, and decreased the bioavailability of Cu, Zn and Cd. Cu, Zn and Cd concentrations in the ground part of ryegrass decreased as the addition amount of the two clays increased from 20 g/kg to 80 g/kg. The reductions in Cu and Cd concentrations were in the order of Na-Montmorillonite > attapulgite, and there was no significant differences for Zn. Available Cu and Zn in the TCLP extraetant solutions significantly decreased with the application of 40 g/kg and 80 g/kg attapulgite and Na-Montmorillonite, while available Cd significantly decreased only with the application of 80 g/kg attapulgite.