细基江蓠(Gracilaria tenuistipitata)对海水池塘养殖区Cu^(2+)生物修复的初步研究

BIOREMEDIATION OF Cu^(2+) POLLUTED ANIMAL CULTURE PONDS BY SEAWEED GRACILARIA TENUISTIPITATA

随着海水养殖业迅速发展,食用海产品重金属(如Cu、Cd等)超标问题日益突出。作为提取藻胶原材料及海洋养殖动物饲料的细基江蓠,可以大规模生长在海水池塘养殖区,有望用于该水域重金属污染的生物修复。本实验通过研究细基江蓠(Gracilaria tenuistipitata)在5个不同Cu2+浓度梯度(0、0.05、0.2、0.8、2.0mg/L)环境下的自身生长状况,及其对Cu2+的吸收富集情况,初步探究了细基江蓠对海水池塘养殖区Cu2+的生物修复能力。实验结果显示细基江蓠对Cu2+有较强的耐受性和吸收富集能力,在0.8mg/L Cu2+浓度下细基江蓠既能保证正常生长,又能吸附水体中最大量的Cu2+。

Heavy metals(such as Cu and Cd) in seafood have become increasingly an alarming issue as the result of rapid development of mariculture. Gracilaria tenuistipitata is used as a material for extracting phycocolloid and fodder for seawater aquaculture. On the other hand, as it proliferates quickly in a large scale, it can be applied in aquaculture for bioremediation against heavy metal pollution in culture ponds. In this study, G. tenuistipitata was studied for understanding its absorption to and capability against Cu2+ pollution in 5 different Cu2+ concentrations(0, 0.05, 0.2, 0.8, 2.0mg/L). It was found that G. tenuistipitata could tolerate and absorb strongly Cu2+. Under 0.8mg/L concentration, it could grow normally with maximum Cu2+ adsorption.