Naaz Shadma, Pandey S N
Department of Botany, Lucknow University, Lucknow 226 007, India.
J Environ Biol. 2010 May;31(3):273-6.
The waste water showed high values of total solid (TS), hardness and chloride with slightly alkaline pH along with high concentrations of Cr (2.03 mg l(-1)), Ni (1.59 mg l(-1)) and Zn (0.46 mg l(-1)). The concentration of Cu (0.21 mg l(-1)) and Zn in industrial waste water was low than Ni and Cr. The diluted (25 and 50%), undiluted (100%) waste water was used to irrigate the lettuce plants grown in alluvial soils. Plants accumulated heavy metals in their shoot (Ni, 13.65; Cr, 19.73; Zn, 21.6 and Cu 14.76 microg g(-1) dry weight) and root (Ni, 41.4; Cr, 31.6; Zn, 30.2 and Cu 15.85 microg g(-1) dry weight) in high concentrations after irrigation with undiluted industrial waste water. Maximum accumulation of heavy metals was found in the root than the shoot (13.65-21.60 microg g(-1) dry weight). Dry matter yield and biomolecules (Chlorophyll a, b and sugar contents) was found to increase with increase in concentration of waste water up to 50%, which declined at the exposure of undiluted waste water. Catalase activity was found to increase with increase in waste water concentrations up to 100%, while carotenoids content increased in plants only up to the 50% waste water irrigation. Use of industrial waste water in such form, on agricultural lands is not found suitable without proper treatment. It could be injurious to plants growth and may be a potential threat to food web.
该废水的总固体（TS）、硬度和氯化物含量较高，pH值呈弱碱性，同时含有高浓度的铬（2.03毫克/升）、镍（1.59毫克/升）和锌（0.46毫克/升）。工业废水中铜（0.21毫克/升）和锌的浓度低于镍和铬。将稀释（25%和50%）、未稀释（100%）的废水用于灌溉生长在冲积土中的生菜植株。用未稀释的工业废水灌溉后，植株地上部（镍，13.65；铬，19.73；锌，21.6；铜，14.76微克/克干重）和根部（镍，41.4；铬，31.6；锌，30.2；铜，15.85微克/克干重）积累了高浓度的重金属。根部的重金属积累量高于地上部（13.65 - 21.60微克/克干重）。发现干物质产量和生物分子（叶绿素a、b和糖分含量）随着废水浓度增加到50%而增加，在接触未稀释废水时则下降。发现过氧化氢酶活性随着废水浓度增加到100%而增加，而类胡萝卜素含量仅在废水灌溉浓度达到50%时在植株中增加。以这种形式在农业土地上使用工业废水，如果没有适当处理是不合适的。它可能对植物生长有害，并且可能对食物网构成潜在威胁。
