CAJ | 학술논문

利用沉积物磷吸附指数(PSI)和磷吸附饱和度(DPS)研究了小兴凯湖表层沉积物的磷吸附容量,分析了沉积物中磷的吸附饱和度(DPS)与其他指标的相关关系,并讨论了不同采样点湖泊沉积物中磷的潜在释放风险.结果表明：13个采样点的表层沉积物的 PSI 为9.78~197.53(mg·L)/(100g·μmol),平均值为59.77(mg·L)/(100g·μmol)；DPS为9.95%~24.47%,平均值为15.41%.PSI与草酸铵提取的磷(Pox)极显著正相关,与草酸铵提取的铁、铝(Feox,Alox)显著正相关,草酸铵提取的铁是影响PSI的主导因素；DPS主要受沉积物中原有吸附态磷的影响.此外,磷释放风险指数(ERI)8.99%~129.94%的计算结果表明：小兴凯湖表层沉积物中磷释放诱发富营养化的风险处于高度风险范围,其中,受农业面源污染影响较大的北岸区域相比其他区域发生富营养化的风险更高.
이용침적물린흡부지수(PSI)화린흡부포화도(DPS)연구료소흥개호표층침적물적린흡부용량,분석료침적물중린적흡부포화도(DPS)여기타지표적상관관계,병토론료불동채양점호박침적물중린적잠재석방풍험.결과표명：13개채양점적표층침적물적 PSI 위9.78~197.53(mg·L)/(100g·μmol),평균치위59.77(mg·L)/(100g·μmol)；DPS위9.95%~24.47%,평균치위15.41%.PSI여초산안제취적린(Pox)겁현저정상관,여초산안제취적철、려(Feox,Alox)현저정상관,초산안제취적철시영향PSI적주도인소；DPS주요수침적물중원유흡부태린적영향.차외,린석방풍험지수(ERI)8.99%~129.94%적계산결과표명：소흥개호표층침적물중린석방유발부영양화적풍험처우고도풍험범위,기중,수농업면원오염영향교대적북안구역상비기타구역발생부영양화적풍험경고.
Phosphorus sorption capacity of surface sediments are estimated by phosphorus sorption index (PSI) of sediments and degree of phosphorus saturation (DPS) in Lake Xiaoxingkai, China. The relationship between DPS and other indicators were analyzed, and the risk of potential phosphorus release were discussed by calculating phosphorus release risk index (ERI). The results showed that PSI ranged from 9.78 to 197.53 (mg·L)/(100g·μmol), with an average of 59.77 (mg·L)/(100g·μmol). DPS ranged from 9.95% to 24.47%, with an average of 15.41%. PSI was significantly and positively correlated to phosphorus (Pox), iron (Feox) and aluminum (Alox) extracted from sediment by ammonium oxalate. Rion extracted from sediment by ammonium oxalate might be the main factor to affect PSI. DPS was influenced mainly by original adsorbed phosphorus of sediments (or Pox). In addition, ERI ranged from 8.99%to 129.94%, which indicated that the Lake Xiaoxingkai might be in high potential eutrophication risk due to the release of phosphorus from surface sediments. Compared to the different sample points, the north area polluted by agricultural non-point source pollution has higher potential eutrophication risk than other areas.