CAJ | 학술논문

腐殖质有很重要的环境属性，它通过和金属物质的相互作用而影响其运输、积累和吸收。在本项研究中，用于表征的沉积物中的腐殖质来自圣保罗的第三大甘蔗栽培区，这个地区生产的甘蔗约占巴西全国甘蔗总产量的60%。根据国际腐植酸学会提出的碱抽提方法可以将腐殖质提取出来，然后通过红外光谱、紫外可见光谱和分子荧光光谱对其进行表征。从红外光谱中获得的腐殖质的特征带以及从紫外可见光谱中分析所得的E4/E6＜5的结果均表明腐殖质分子结构的聚合度很高。在分子荧光发射光谱中显示的主要是芳香结构的特征带。分子荧光光谱的同步检测图则显示腐殖质在400 n m处的荧光强度最大，而在此处含有五个芳香环的多环芳烃的荧光强度恰好也是最大。因此，实验结果表明腐殖质分子有很高的聚合度，并且其芳香性大于脂肪性。
부식질유흔중요적배경속성，타통과화금속물질적상호작용이영향기운수、적루화흡수。재본항연구중，용우표정적침적물중적부식질래자골보라적제삼대감자재배구，저개지구생산적감자약점파서전국감자총산량적60%。근거국제부식산학회제출적감추제방법가이장부식질제취출래，연후통과홍외광보、자외가견광보화분자형광광보대기진행표정。종홍외광보중획득적부식질적특정대이급종자외가견광보중분석소득적E4/E6＜5적결과균표명부식질분자결구적취합도흔고。재분자형광발사광보중현시적주요시방향결구적특정대。분자형광광보적동보검측도칙현시부식질재400 n m처적형광강도최대，이재차처함유오개방향배적다배방경적형광강도흡호야시최대。인차，실험결과표명부식질분자유흔고적취합도，병차기방향성대우지방성。
Humic substances(HS) have an important environmental property, interacting with metal species and inlfu-encing their transport, accumulation and bioavailabilty. In this study, the HS of sediment from an area of intensive sugar cane cultivation, considered the third largest in the state of SP were characterized. This region accounts for about 60%of production in Brazil. The HS were extracted according to the method suggested by IHSS using an alkali extraction, followed by characterization by infrared spectroscopy(IR), ultraviolet/visible(UV/Vis) spectroscopy and molecular lfuo-rescence. The IR spectra showed characteristic bands of HS and the E4/E6 ratio obtained in the UV/Vis analysis were <5 suggesting, a more condensed structure. The results obtained in the emission lfuorescence spectra also showed charac-teristics of predominantly aromatic structures. In the synchronous molecular lfuorescence highest lfuorescence intensity was in the region of 400nm, which is assigned to aromatic polycyclic hydrocarbons with ifve aromatic rings. Thus, the results showed that the humic substances have a molecular structure with a higher degree of condensation, having thus more aromatic structures than aliphatics.