Mor Suman, Kaur Kamalpreet, Khaiwal Ravindra
Department of Environment Studies, Panjab University, Chandigarh-160 014, India.
School of Public Health, PGIMER, Chandigarh-160 012, India.
J Environ Biol. 2013 Nov;34(6):1083-7.
Pot experiments were carried out to study the effect of different dilutions of leachate generated from municipal solid waste (MSW) landfill on bread wheat (Triticum aestivum). Eight treatment groups with different concentrations (0-100%) of leachate were prepared and treatments were given to the plants till they reached complete vegetative phase (45 days). The growth performances of wheat plants were assessed in terms of various parameters such as shoot and root length, dry biomass and chlorophyll content. Plants treated with higher concentrations of leachate (75% and 100%) showed higher growth (2.5 and 6%) and 100% survival rate as compared to control. However, high shoot weight (0.028 and 0.030 gm) and high chlorophyll content (213 and 230%) was reported in 30 and 40% leachate treatment as compared to control. Some symptoms of stress (discoloration of leaf blade, wilting and yellowing of plants) were also observed in plants, which could be related to the presence of high concentration of salts in the leachate. The current study suggests that MSW landfill leachate is rich in nutrients and can be used as fertilizer but before its application, the salinity level and concentration of toxic metals present in leachate should be considered in accordance with the tolerance ability of any plant.
进行盆栽试验以研究城市固体废弃物（MSW）填埋场产生的渗滤液不同稀释度对面包小麦（普通小麦）的影响。制备了八个不同渗滤液浓度（0 - 100%）的处理组，并对植株进行处理直至其达到完全营养生长阶段（45天）。从小麦植株的地上部和根部长度、干生物量和叶绿素含量等各种参数方面评估其生长表现。与对照相比，用较高浓度渗滤液（75%和100%）处理的植株生长更高（分别为2.5%和6%）且存活率达100%。然而，与对照相比，30%和40%渗滤液处理的植株地上部重量较高（分别为0.028克和0.030克）且叶绿素含量较高（分别为213%和230%）。在植株中还观察到一些胁迫症状（叶片变色、植株萎蔫和发黄），这可能与渗滤液中高浓度盐分的存在有关。当前研究表明，城市固体废弃物填埋场渗滤液富含养分，可作为肥料使用，但在施用前，应根据任何植物的耐受能力考虑渗滤液中盐分水平和有毒金属的浓度。
