Influence of paper mill wastewater on reed chlorophyll content and biomass

Publication date: Available online 5 June 2018Source: Physics and Chemistry of the Earth, Parts A/B/CAuthor(s): Fangli Su, Linlin Dong, Haifu Li, Tieliang WangAbstractStudies on the influence of paper mill wastewater, which affects photosynthesis, on reed chlorophyll and biomass can provide a theoretical basis for the ecological restoration of wetland plants. The influence of different concentrations of wastewater (chemical oxygen demands (COD) of 300, 175 and 50 mg•L−1) and different irrigation times (germination, blade-expansion, rapid-growth, heading and maturity stages) on the contents of chlorophyll a, chlorophyll b, total chlorophyll and chlorophyll a/b in reeds were tested in experimental pools that simulated the wetland ecosystem of the Liaoning Shuangtai estuary. The contents of chlorophyll a, chlorophyll b, total chlorophyll and chlorophyll a/b all increased significantly with increasing concentrations of wastewater, and their contents all differed significantly from each other. The contents of chlorophyll a, chlorophyll b and total chlorophyll were maximal when irrigated at the beginning of all growth stages with COD of 300 mg•L−1(C1O) at 2.253, 0.458 and 2.711 mg•g−1 fresh weight (FW), respectively, with irrigation at the rapid-growth stage and were minimal in the control plants at 0.142, 0.068 and 0.210 mg•g−1 FW, respectively, with irrigation at maturity. Chlorophyll a/b was maximal at C1O at 5.753 with irrigation at germination stage and...
Source: Physics and Chemistry of the Earth, Parts ABC - Category: Science Source Type: research
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