CAJ | 학술논문

氢氧化钠（NaOH）和焦磷酸钠（Na4P2O7）是从陆相环境中分离腐植酸（HA）最常用的2种萃取剂。为了评价萃取剂对HA性质和微量元素的影响，采用3种不同溶液，即（a）0.5moi／L NaOH；（b）01mol／LNa4P2O7；（c）0．5mol／LNaOH＋0.1mol／LNa。巳0。从54-泥炭藓泥炭样品中分离HA，并分析了萃取得到的HA的灰分含量、元素组成和主要原子比，以及傅立叶变换红外光谱（FT-IR）和发光光谱特征。此外，还用X射线荧光法测定泥炭样品和HA中的Br、Cu、Fe、Ni、Pb和Zn的含量。试验结果表明：用NaOH和NaOH＋Na4P2O7萃取的HA在灰分、元素含量和光谱特征上十分相似，而Na4P2O7溶液通常降低了萃取率，似乎是影响了HA的本质，使之具有更加复合和芳香性的特征。与原泥炭样品比较，不论什么萃取剂萃取得到的HA，其Br、Cu和Ni含量均增加，而Fe、Pb和Zn含量减少。相比于其他的方法，用Na4P2O2萃取得到的HA含有更多Br、Cu、Ni和Zn，可能是因为HA的芳香性分子对这些元素显示出更大的亲和力。
경양화납（NaOH）화초린산납（Na4P2O7）시종륙상배경중분리부식산（HA）최상용적2충췌취제。위료평개췌취제대HA성질화미량원소적영향，채용3충불동용액，즉（a）0.5moi／L NaOH；（b）01mol／LNa4P2O7；（c）0．5mol／LNaOH＋0.1mol／LNa。사0。종54-니탄선니탄양품중분리HA，병분석료췌취득도적HA적회분함량、원소조성화주요원자비，이급부립협변환홍외광보（FT-IR）화발광광보특정。차외，환용X사선형광법측정니탄양품화HA중적Br、Cu、Fe、Ni、Pb화Zn적함량。시험결과표명：용NaOH화NaOH＋Na4P2O7췌취적HA재회분、원소함량화광보특정상십분상사，이Na4P2O7용액통상강저료췌취솔，사호시영향료HA적본질，사지구유경가복합화방향성적특정。여원니탄양품비교，불론십요췌취제췌취득도적HA，기Br、Cu화Ni함량균증가，이Fe、Pb화Zn함량감소。상비우기타적방법，용Na4P2O2췌취득도적HA함유경다Br、Cu、Ni화Zn，가능시인위HA적방향성분자대저사원소현시출경대적친화력。
Among several extractants used to isolate humic acids （HA） from terrestrial environments, sodium hydroxide （NaOH） and sodium pyrophosphate （Na4P207） are the most utilized. In order to evaluate the influence of these different extractant solutions on the HA quality and on their trace elements content, HA were isolated from five Sphagnum- peat samples using three different solutions：（a）0.5 mol/L NaOH; （b）0.1 mol/L Na4P207; （c）0.5 mol/L NaOH ＋ 0.1 mol/L Na4P207. The obtained HA have been analyzed with respect to ash content, elemental composition, main atomic ratios and characterized by FT-IR and total luminescence （TL） spectroscopies. In addition, both raw peat and HA have been analyzed using X-ray fluorescence in order to determine the Br, Cu, Fe, Ni, Pb and Zn contents. Results showed that HA extracted with NaOH and NaOH ＋Na4P207 are quite similar with respect to ash, elemental contents and spectroscopic characteristics, while Na4P207 solution, which in general reduces the extraction yield, seems to affect the nature of HA, featuring a more complex and aromatic character. With respect to the contents in the corresponding raw peat samples, the HA fractions were richer in Br, Cu and Ni, regardless of the extractant used, and poorer in Fe, Pb and Zn. Further, Br, Cu, Ni and Zn were more concentrated in the HA extracted with Na4P207 than in those extracted with NaOH and NaOH ＋Na4P2OT, probably because of the greater affinity of these elements for these more aromatic humic molecules