摘要
采用水培法研究了海洋滩涂耐盐植物海马齿(Sesuvium portu lacastrum Linn.)对海水菲污染的修复作用.结果显示,实验4d后,不种植海马齿的对照组、种植海马齿的抑菌组和不抑菌组海水中菲浓度分别从0.988、0.942和0.957mg·L-1降至0.553、0.185和0.070mg·L-1,降低了44.0%、80.4%和92.7%;与对照组相比,抑菌组(T1)和不抑菌组(T2)海水中菲的去除率分别提高了36.4%和48.7%,不抑菌组又比抑菌组高12.3%.利用差减法计算的结果显示,在与自然水体接近的不抑菌条件下,菲的非生物损失、海马齿的作用和微生物的作用,三者对海水中菲浓度降低(92.7%)的贡献分别为44.0%、36.4%和12.3%,海马齿植株内菲的积累量则仅占海水中菲减少量的2.6%.研究表明,水培海马齿可明显提高菲污染海水中菲的去除率,其中,植物与微生物共同发挥着重要的作用,但植物积累不是海马齿修复海水菲污染的主要机制.
Phytoremediation of phenanthrene by marine halophyte Sesuvium portulacastrum Linn. was studied through a hydroponic culture approach. The results showed that, after 4 days incubation, the concentration of phenanthrene in the culture medium of the unplanted control group （CK）, the planted treatment group with sterilization （T1 ） and without sterilization （ T2 ） reduced from 0. 988, 0. 942 and 0. 957 rag＂ L-1 to 0. 553, 0. 185 and 0. 070 mg.L-1 , respectively, i.e. the reduction rate was about 44.0% , 80.4% and 92.7% for CK, T1 and T2 respectively. Comparing with that of CK, the increase of phenanthrene removal rate was about 36.4% and 48.7% for T1 and T2 respectively, corresponding to a 12-3% higher for T2 than T1 . By subtraction method, the contribution of phenanthrene removal caused by abiotic loss and that through the agency of plant and microbes were calculated to be 44.0% , 36.4% and 12.3%. It should be noted that the non- sterile group was similar to that of natural waters. However, in such cases, the accumulation of phenanthrene inside the plant only accounted for 2.6%. It was suggested that the hydroponic Sesuvium portulacastrum Linn. could significantly enhance the removal of phenanthrene in seawater, where the plant and the associated microbes might play a major role in the removal processes. Results also suggested that phytoaccumulation mechanism was not as important as expected for Sesuvium portulacastrum Linn. in the remediation of phenanthrene.
出处
《环境科学学报》
CAS
CSCD
北大核心
2012年第3期618-625,共8页
Acta Scientiae Circumstantiae
基金
国家高技术研究发展(863)计划(No.2007AA091704)
厦门市科技计划项目(No.3502Z20102004)~~
关键词
海马齿
菲
多环芳烃
植物修复
海水
Sesuvium portulacastrum Linn.
phenanthrene
polycyclic aromatic hydrocarbons （PAHs）
phytoremediation
seawater
