Agricultural Engineering Department, Faculty of Agriculture, Cairo University, PO box 12613, Giza, Egypt.
Agricultural Botany Department - Plant Physiology Division, Faculty of Agriculture, Cairo University, PO box 12613, Giza, Egypt.
Ecotoxicol Environ Saf. 2018 Dec 15;165:637-644. doi: 10.1016/j.ecoenv.2018.08.103. Epub 2018 Sep 19.
Industrial wastewater containing heavy metals is a major environmental problem that needs to be treated. This study reported the ability of two fresh water algae cyanobacteria (Nostoc muscorum and Anabaena variabilis) to remove lead from aqueous solutions of four different initial concentrations (0-50 mg/L) for 21 days under controlled laboratory conditions. Results obtained in this study showed a maximum removal of Pb(II) (97.8%) by N. muscorum at 15 mg/L initial metal concentration however the maximum removal by A. variabilis at the same concentration was 71.4% after 16 day of incubation. These N. muscorum appeared to be more efficient than A. variabilis for removing Pb(II). Algal growth, pigments in the algae cells were measured during incubation period. Lower concentrations of lead increased biomass, OD, chlorophyll a and carotenoids in both algae. On the other hand, higher concentrations of lead were inhibitory for growth.
含重金属的工业废水是一个亟待处理的重大环境问题。本研究报告了两种淡水藻类蓝藻（地木耳和鱼腥藻）在控制实验室条件下，从四种不同初始浓度（0-50mg/L）的水溶液中去除铅的能力，为期 21 天。本研究结果表明，在 15mg/L 的初始金属浓度下，N. muscorum 对 Pb(II)的最大去除率为 97.8%，而在相同浓度下，A. variabilis 的最大去除率为 16 天后的 71.4%。在去除 Pb(II)方面，这些地木耳似乎比鱼腥藻更有效。在培养期间测量了藻类生长和藻类细胞中的色素。较低浓度的铅增加了两种藻类的生物量、OD、叶绿素 a 和类胡萝卜素。另一方面，较高浓度的铅对生长有抑制作用。
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