Integrated industrial effluent (IIE) released from SIIDCUL causes serious environmental problems in the vicinity of Haridwar, India. Therefore, this study investigated the potential of water fern (Azolla pinnata R.Br.) for phyto-treatment of IIE. Laboratory experiments with six IIE concentrations (0 as control with bore well water, 20, 40, 60, 80 and 100%) were performed for bio-removal of selected physicochemical, microbiological and heavy metal parameters of IIE in pot type experiments. The overall results described maximum removal of physico-chemical (pH, EC, TDS, BOD, COD, TKN, Ca, Mg, Na, K), microbiological (MPN and SPC) and heavy metals (Cd, Cu, Cr, Fe, Pb, Mn, and Zn) parameters in 60% concentration of IIE, respectively. The stimulus effect of IIE concentration on pollutant removal process was confirmed using Kruskal-Wallis post hoc test, one way ANOVA (p < 0.05), and linear regression (R2 < 0.85) tools. Besides this, A. pinnata relative plant growth rate was also maximum in 60% IIE treatment. This is the first report on phytoremediation of IIE while findings of this study showed that A. pinnata was useful for the eco-friendly treatment of SIIDCUL IIE and could minimize potential wastewater management issues.

中文翻译：

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蕨类植物（Azolla pinnata R.Br.）在印度哈里德瓦尔SIIDCUL综合工业废水的植物修复中的潜力：去除物理化学和重金属污染物。

SIIDCUL排放的综合工业废水（IIE）在印度Haridwar附近引起严重的环境问题。因此，本研究调查了水蕨（Azolla pinnata R.Br.）对IIE进行植物处理的潜力。进行了六种IIE浓度的实验室实验（0作为井水对照，20％，40％，60％，80％和100％），用于锅内实验中生物去除IIE的选定理化，微生物和重金属参数。总体结果描述了最大程度地去除物理化学物质（pH，EC，TDS，BOD，COD，TKN，Ca，Mg，Na，K），微生物学（MPN和SPC）和重金属（Cd，Cu，Cr，Fe， IIE浓度分别为60％时的Pb，Mn和Zn）参数。使用Kruskal-Wallis事后检验证实了IIE浓度对污染物去除过程的刺激作用，单向方差分析（p <0.05）和线性回归（R2 <0.85）工具。除此之外，在60％IIE处理中，pinaata的相对植物生长速率也最大。这是有关IIE的植物修复的第一份报告，而这项研究的结果表明，pinnata可以用于SIIDCUL IIE的生态友好处理，并且可以最大程度地减少潜在的废水管理问题。