a Agro-ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science , Gurukula Kangri Vishwavidyalyaya , Haridwar , Uttarakhand , India.
Int J Phytoremediation. 2018 Apr 16;20(5):507-521. doi: 10.1080/15226514.2017.1393391.
This study was conducted to assess the pollutant uptake capability of water lettuce (Pistia stratiotes L.) in terms of bioaccumulation, enrichment, and translocation of heavy metals grown in sugar mill effluent. Results showed that the maximum fresh weight (328.48 ± 2.04 gm kg), total chlorophyll content (2.13 ± 2.03 mg g fwt), and relative growth rate, RGR (11.89 gg d) of P. stratiotes were observed at 75% concentration of the sugar mill effluent after 60 days of phytoremediation experiment. The bioaccumulation factor (B) of different heavy metals was greater than 1 with 50% and 75% concentrations of sugar mill effluent and this indicated that P. stratiotes was hyperaccumulator or phytoremediator of these metals. The enrichment factor (E < 2 for Cu, Fe, Cr, Pb, Zn, and Mn) and (E > 2 for Cd) indicated that P. stratiotes mineral enrichment deficient and it moderately enriched the different heavy metals. Moreover, translocation factor (T) was less than 1 which indicated the low mobility of metals in different parts (root and leaves) of P. stratiotes after phytoremediation. Therefore, P. stratiotes can be used for phytotreatment of sugar mill effluent up to 50% to 75% concentrations and considered as hyperaccumulator aquatic plant for different heavy metals and other pollutants from the contaminated effluents.
本研究旨在评估水蕹菜（Pistia stratiotes L.）在糖厂废水处理中的重金属生物积累、富集和转移能力。结果表明，在 60 天的植物修复实验后，水蕹菜在糖厂废水浓度为 75%时表现出最大的鲜重（328.48 ± 2.04 g m kg）、总叶绿素含量（2.13 ± 2.03 mg g fwt）和相对生长率 RGR（11.89 gg d）。不同重金属的生物积累因子（B）大于 1，在 50%和 75%的糖厂废水浓度下，这表明水蕹菜是这些金属的超积累植物或植物修复剂。富集因子（E < 2 对于 Cu、Fe、Cr、Pb、Zn 和 Mn，E > 2 对于 Cd）表明水蕹菜对不同重金属的矿质元素富集能力不足，仅为中度富集。此外，迁移因子（T）小于 1，这表明在植物修复后，重金属在水蕹菜不同部位（根和叶）中的移动性较低。因此，水蕹菜可以用于处理糖厂废水，最高可达 50%至 75%的浓度，并且可以作为一种超积累水生植物，用于处理受污染废水中的不同重金属和其他污染物。
