Ajayan Kayil Veedu, Selvaraju Muthusamy, Unnikannan Pachikaran, Sruthi Palliyath
a Environmental Science Division, Department of Botany, Annamalai University , Tamilnadu , India.
Int J Phytoremediation. 2015;17(10):907-16. doi: 10.1080/15226514.2014.989313.
A number of microalgae species are efficient in removing toxicants from wastewater. Many of these potential species are a promising, eco-friendly, and sustainable option for tertiary wastewater treatment with a possible advantage of improving the economics of microalgae cultivation for biofuel production. The present study deals with the phycoremediation of tannery wastewater (TWW) using Scenedesmus sp. isolated from a local habitat. The test species was grown in TWW under laboratory conditions and harvested on the 12th day. The results revealed that the algal biomass during the growth period not only reduced the pollution load of heavy metals (Cr-81.2-96%, Cu-73.2-98%, Pb-75-98% and Zn-65-98%) but also the nutrients (NO3 >44.3% and PO4 >95%). Fourier Transform Infrared (FTIR) spectrums of Scenedesmus sp. biomass revealed the involvement of hydroxyl amino, carboxylic and carbonyl groups. The scanning electron micrograph (SEM) and Energy Dispersive X-ray Spectroscopic analysis (EDS) revealed the surface texture, morphology and element distribution of the biosorbent. Furthermore, the wastewater generated during wet-blue tanning process can support dense population of Scenedesmus sp., making it a potential growth medium for biomass production of the test alga for phycoremediation of toxicants in tannery wastewaters.
许多微藻物种能够有效地从废水中去除有毒物质。这些潜在物种中的许多是用于三级废水处理的有前景、环保且可持续的选择，可能具有改善微藻养殖用于生物燃料生产的经济性的优势。本研究涉及使用从当地栖息地分离的栅藻对制革废水（TWW）进行藻类修复。测试物种在实验室条件下于制革废水中生长，并在第12天收获。结果表明，生长期间的藻类生物量不仅降低了重金属（铬 - 81.2 - 96%、铜 - 73.2 - 98%、铅 - 75 - 98%和锌 - 65 - 98%）的污染负荷，还降低了营养物质（硝酸盐>44.3%和磷酸盐>95%）的污染负荷。栅藻生物量的傅里叶变换红外（FTIR）光谱显示了羟基氨基、羧基和羰基的参与。扫描电子显微镜（SEM）和能量色散X射线光谱分析（EDS）揭示了生物吸附剂的表面纹理、形态和元素分布。此外，湿蓝鞣制过程中产生的废水可以支持栅藻的密集生长，使其成为用于制革废水有毒物质藻类修复的测试藻类生物量生产的潜在生长介质。
