Navamindradhiraj University, Khao Road, Bangkok, 10300, Thailand.
Mahidol University, Nakhonsawan Campus, Nakhon Sawan, 60130, Thailand.
Environ Sci Pollut Res Int. 2018 Feb;25(6):5344-5358. doi: 10.1007/s11356-017-0813-5. Epub 2017 Dec 5.
The ability of a mixture of Typha angustifolia and Eichhornia crassipes to remove organics, nutrients, and heavy metals from wastewater from a Thailand fresh market was studied. Changes in physicochemical properties of the wastewater including pH, temperature, chemical oxygen demand, dissolved oxygen, biochemical oxygen demand (BOD), total P, TOC, conductivity, total Kjeldahl nitrogen, NO-N, NH-N, and metal (Pb, Cd, and Zn) concentrations were monitored. In the aquatic plant (AP) treatment, 100% survival of both species was observed. Dry biomass production and growth rate of T. angustifolia were approximately 3.3× and 2.7× of those for E. crassipes, respectively. The extensive root system of the plants improved water quality as determined by a marked decrease in turbidity in the AP treatment after 7 days. BOD content served as a useful indicator of water quality; BOD declined by 91% over 21 days. Both T. angustifolia and E. crassipes accumulated similar quantities of metals in both roots and shoots. Accumulation of metals was as follows: Zn > Cd > Pb. A study of calorific value and biomass composition revealed that T. angustifolia and E. crassipes possessed similar carbon content (~ 35%), hydrogen content (~ 6%), and gross calorific value. E. crassipes contained up to 16.9% ash and 65.4% moisture. Both species are considered invasive in Thailand; however, they may nonetheless provide practical benefits: In addition to their combined abilities to treat wastewater, T. angustifolia holds potential as an alternative energy source due to its high biomass production.
研究了香蒲和凤眼蓝混合物从泰国新鲜市场废水去除有机物、营养物质和重金属的能力。监测了废水的理化性质变化，包括 pH 值、温度、化学需氧量、溶解氧、生化需氧量（BOD）、总磷、总有机碳、电导率、总凯氏氮、硝态氮、氨氮和金属（铅、镉和锌）浓度。在水生植物（AP）处理中，两种植物均达到 100%的存活率。香蒲的干生物量产量和生长速度分别约为凤眼蓝的 3.3 倍和 2.7 倍。植物发达的根系改善了水质，在 AP 处理后 7 天，浊度明显下降。BOD 含量是水质的一个有用指标；BOD 在 21 天内下降了 91%。香蒲和凤眼蓝在根和茎中积累的金属量相似。金属的积累情况如下：Zn > Cd > Pb。热值和生物质组成的研究表明，香蒲和凤眼蓝具有相似的碳含量（约 35%）、氢含量（约 6%）和总热值。凤眼蓝含有高达 16.9%的灰分和 65.4%的水分。这两个物种在泰国都被认为是入侵物种；然而，它们可能仍然具有实际的好处：除了它们共同处理废水的能力外，香蒲由于其高生物量产量，也可能成为一种替代能源。
