Department of Agricultural and Biosystems Engineering, Landmark University, Omu-Aran, Nigeria.
Department of Agricultural and Environmental Engineering, Federal University of Technology, Akure, Nigeria.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2023;58(8):773-781. doi: 10.1080/10934529.2023.2230100. Epub 2023 Jul 4.
The objective of this investigation was to determine whether and . plants have the phytoremediation potential for removing heavy metals and nutrients from greywater treated in batch-fed Horizontal sub-surface Flow Constructed Wetlands (HssFCW). The HssFCW had a Hydraulic Retention Time (HRT) and organic loading rate (OLR) of 3 days and 3.96 (g.BOD/m.day) respectively. Greywater (GW) samples were characterized for electrical conductivity (EC), total nitrogen (TN), total phosphorous (TP), pH, sodium adsorption ratio (SAR), metals (Al, Fe, Mg, Ca) and Biochemical Oxygen Demand (BOD). The accumulation of metals in the soil and edible parts of plants was evaluated in terms of bioconcentration and translocation factors. Metal concentrations were determined using an atomic absorption spectrometer, while nutrients were by colorimetric method. The result shows that the metals and nutrients were below the WHO allowable limit for treated greywater recycling in agriculture. Nutrient removal was insignificantly different while metal removal was significantly different in the constructed wetlands (CW). The results indicated that is preferred as a perennial plant with unlimited metal accumulation and high nutrient removals compare to O. with a high metal concentration in the above-ground plant tissue and also an annual plant.
本研究旨在确定 和 植物是否具有在批量进料水平潜流人工湿地（HssFCW）中处理后的灰水中去除重金属和养分的植物修复潜力。HssFCW 的水力停留时间（HRT）和有机负荷率（OLR）分别为 3 天和 3.96（g.BOD/m.day）。灰水（GW）样品的电导率（EC）、总氮（TN）、总磷（TP）、pH 值、钠离子吸附比（SAR）、金属（Al、Fe、Mg、Ca）和生化需氧量（BOD）进行了表征。采用生物浓缩和转运因子来评估金属在土壤和植物可食部分中的积累。金属浓度采用原子吸收光谱仪测定，而养分则采用比色法测定。结果表明，处理后的灰水中的金属和养分浓度均低于世界卫生组织允许用于农业回用水的限量。人工湿地中养分去除差异不显著，而金属去除差异显著。结果表明，与地上植物组织中金属浓度较高且为一年生植物的 相比， 作为一种多年生植物，具有无限的金属积累和较高的养分去除能力，是首选植物。
