海洋通报
海洋通報
해양통보
MARINE SCIENCE BULLETIN
2014年
4期
413-418
,共6页
环形水槽%沉积物%多环芳烃%流速%悬浮固体%释放
環形水槽%沉積物%多環芳烴%流速%懸浮固體%釋放
배형수조%침적물%다배방경%류속%현부고체%석방
annular flume%sediments%polycyclic aromatic hydrocarbons%flow velocity%suspended solid%release
采用环形水槽研究了沉积物中多环芳烃（PAHs）的释放过程，通过测定水相PAHs浓度考察不同流速下沉积物中PAHs释放情况。试验结果表明，沉积物中PAHs释放速率和释放量受水流流速影响很大，总体上移PAHs浓度随水流流速增加呈上升趋势，从开始静水时的5.602 ug/L增加到流速为60 cm/s时的22.158 ug/L；各层移PAHs浓度随流速增加变化趋势有所不同，表层和中层移PAHs浓度随水流流速的增加呈现上升后下降的趋势，当水流流速分别为20 cm/s和25 cm/s时，表层和中层最大浓度分别为1.816 ug/L 和1.902 ug/L；底层呈逐渐上升的趋势。各物质随水流变化表现出的变化趋势略有不同，各层苊烯和蒽浓度随水流作用变化不大，萘、苊、菲、荧蒽、芘和屈随水流变化总体上呈现上升后下降的趋势。研究还发现沉积物再悬浮引起PAHs释放的同时伴随着沉积物对PAHs的吸附过程。
採用環形水槽研究瞭沉積物中多環芳烴（PAHs）的釋放過程，通過測定水相PAHs濃度攷察不同流速下沉積物中PAHs釋放情況。試驗結果錶明，沉積物中PAHs釋放速率和釋放量受水流流速影響很大，總體上移PAHs濃度隨水流流速增加呈上升趨勢，從開始靜水時的5.602 ug/L增加到流速為60 cm/s時的22.158 ug/L；各層移PAHs濃度隨流速增加變化趨勢有所不同，錶層和中層移PAHs濃度隨水流流速的增加呈現上升後下降的趨勢，噹水流流速分彆為20 cm/s和25 cm/s時，錶層和中層最大濃度分彆為1.816 ug/L 和1.902 ug/L；底層呈逐漸上升的趨勢。各物質隨水流變化錶現齣的變化趨勢略有不同，各層苊烯和蒽濃度隨水流作用變化不大，萘、苊、菲、熒蒽、芘和屈隨水流變化總體上呈現上升後下降的趨勢。研究還髮現沉積物再懸浮引起PAHs釋放的同時伴隨著沉積物對PAHs的吸附過程。
채용배형수조연구료침적물중다배방경（PAHs）적석방과정，통과측정수상PAHs농도고찰불동류속하침적물중PAHs석방정황。시험결과표명，침적물중PAHs석방속솔화석방량수수류류속영향흔대，총체상이PAHs농도수수류류속증가정상승추세，종개시정수시적5.602 ug/L증가도류속위60 cm/s시적22.158 ug/L；각층이PAHs농도수류속증가변화추세유소불동，표층화중층이PAHs농도수수류류속적증가정현상승후하강적추세，당수류류속분별위20 cm/s화25 cm/s시，표층화중층최대농도분별위1.816 ug/L 화1.902 ug/L；저층정축점상승적추세。각물질수수류변화표현출적변화추세략유불동，각층액희화은농도수수류작용변화불대，내、액、비、형은、비화굴수수류변화총체상정현상승후하강적추세。연구환발현침적물재현부인기PAHs석방적동시반수착침적물대PAHs적흡부과정。
Sediment resuspension and polycyclic aromatic hydrocarbons (PAHs) release process were investigated in the annular flume in this paper. The aqueous concentration of Σ PAHs was increasing from the initial concentration of 5.602 ug/L to 22.158 ug/L with the flow velocity of 60 cm/s. The peak concentration of Σ PAHs was 1.816 ug/L at the aqueous surface and 1.902 ug/L in the middle as the flow velocities were increased to 20 cm/s and 25 cm/s respectively, and there was a going down trend with the flow velocity increasing to 60 cm/s. The aqueous bottom concentration of Σ PAHs was increasing with the increasing flow velocity. Concentrations of naphthalene, acenaphthylene, phenanthrene, floursnthrene, pyrene and chrysene were increasing at the initial phase and decreasing with the following increasing velocity. The aquatic concentration of PAHs was affected by the concentration of suspended solid produced by the water flow, and the PAHs were released from the suspended solid of low concentration and were adsorbed by the suspended solid of high concentration.
