Материалы к флоре болот Тамбовской области

Тамбовская область находится в лесостепной природной зоне, которая характеризуется сравнительно низкой заболоченностью и сильным преобразованием естественных ландшафтов. В XX веке болота подверглись значительному антропогенному воздействию, что отразилось на флоре, но почти не было зафиксировано в публикациях последних трех десятилетий. Нами в 2011–2021 гг. маршрутно-ключевым методом обследовано 46 болот в 13 районах Тамбовской области, на основе полученных результатов составлен список высших растений, указано их распределение по основным типам болот (низинные, переходные, верховые) и встречаемость. На болотах Тамбовской области выявлено 158 видов сосудистых растений (108 родов и 55 семейств) и 33 вида мхов (14 родов и 9 семейств). Наиболее часто на болотах региона из сосудистых растений встречались Salix cinerea, Typha latifolia, Lysimachia vulgaris, L. thyrsiflora, Carex acuta, Betula pubescens, Calamagrostis canescens, Phragmites australis, Lycopus europaeus, из мхов – Sphagnum fallax, S. flexuosum, S. angustifolium. На болотах зафиксированы популяции 22 видов, включённых в Красную книгу Тамбовской области. БлагодарностиРабота проведена в рамках выполнения государственного задания 121051100099-5.

Fitorremediação como Alternativa de Tratamento em Emissões de Lixiviado em Aterros Fechados

O descomissionamento e encerramento das atividades em aterros controlados e lixões, embora almejado, gera grande preocupação a todos os países. Além do enorme passivo ambiental, a produção constante de subprodutos continua a impactar o ambiente mesmo depois do encerramento das atividades nesses locais. Com os avanços tecnológicos, ferramentas importantes foram desenvolvidas visando não somente a remediação, mas também a recuperação dessas áreas e dos subprodutos gerados por ela. O lixiviado emitido por aterros, além de conter níveis significativos de poluentes, gera um custo elevado para ser devidamente armazenado e tratado. Algumas alternativas sustentáveis para seu tratamento se destacaram, uma delas é a fitorremediação utiliza plantas e sua microbiota associada na remoção de poluentes da água e do solo. Trata-se de uma tecnologia de baixo custo, pouca mão de obra, com resultados satisfatórios, abarca um ramo de contaminantes numeroso, atua tanto nos quesitos ambientais, como os sociais e econômicos. O objetivo deste trabalho é apresentar uma síntese de estudos acerca da fitorremediação em lixiviado de aterros controlados e lixões visando a recuperação ambiental. O presente trabalho apresenta uma revisão bibliográfica de artigos sobre fitorremediação em áreas de aterros indexados na Principal Coleção do “Web of Science” no período de 2005 a 2020. A análise bibliográfica demonstrou o enorme potencial da técnica relatando uma grande diversidade de espécies, entretanto muitos trabalhos focam em plantas já amplamente conhecidas como Populus sp, Salix sp., e as macrófitas Eichhornia crassipes e Typha latifólia. Foi observada uma diversidade ampla de poluentes tratados, porém a maioria desses são comuns a diversas áreas contaminadas, não apenas as áreas de aterro. Foi observada a necessidade de estudos com maior diversidade de espécies vegetais, visando inclusive a utilização de espécies nativas com potencial fitorremediador já relatado em outros trabalhos.

EROSION CONTROL WITH GEOTEXTILES FROM NATURAL FIBERS IN THE MARGIN OF THE SÃO FRANCISCO RIVER

O baixo rio São Francisco foi impactado por mudanças no fluxo do rio causadas por políticas públicas implementadas nas últimas décadas causadas pela geração de energia elétrica. O objetivo deste trabalho foi avaliar o uso de geotêxteis fabricados a partir de fibras naturais no controle da erosão na margem do rio São Francisco. Geotêxtil , Syagrus coronata Geotêxtil e Bare Soil sem geotêxteis, localizado na margem direita do baixo rio São Francisco, no município de Amparo de São Francisco, estado de Sergipe, nordeste do Brasil. Entre os geotêxteis testados, os geotêxteis Syagrus coronata e Juncus sp foram temporalmente mais eficientes no controle da erosão, produzindo menor quantidade de sedimentos, embora na resistência e durabilidade das fibras, Typha latifolia apresentou melhores resultados.

Impact of Various Types of Polluted Water, Rhizome Size and Water Depth on Sprouting of Common Cattail (Typha latifolia L.) Rhizomes

Three different studies were carried out in the Department of Weed Science, The University of Agriculture Peshawar, in January 2016 to examine the impacts of polluted water from various sources, water depths and rhizome size on the resprouting ability and establishment of common cattail rhizomes fragments after mechanical control. These experiments were arranged in Completely Randomized Design (CRD), replicated thrice. The selected experimental units were pots 20 inches wide and 12 inches deep. Typha latifolia L. rhizomes were placed in each pots and covered with a little silt to avoid it’s direct contact and desiccation from sunlight. The impacts of water quality on T. latifolia rhizomes sprouting were significant. Lowest ratio of sprouted and un-sprouted buds (50.00 % each), 1st sprout length (37.33 and 40 cm), average sprout length (17.47 and 16.96 cm), average biomass (9.99 and 10.27 g) and growth rate (0.172 and 0.196 g/day) were noted for saline water and industrial acidic effluents, respectively. However, highest rhizome sprouting was recorded for tap water applied as check followed by industrial effluent alkaline. The data regarding the impact of water depth on T. latifolia rhizome sprouting showed that sprouting (44.44 %), 1st sprout length (43.33 cm), average sprout length (20.99 cm), average sprout biomass (7.84 g), average diameter of the newly formed rhizome (0.24 cm) and growth rate (0.4233 g/day) were recorded for rhizomes placed at zero level water depth, while maximum buds sprouted at 4 inches water depth. Similarly, impact of rhizome size on resprouting revealed that minimum bud sprouting (44.44%), 1st sprout length (44.86 cm), average sprout length (0.93 cm) and biomass of newly formed rhizome (4.97 g) and minimum days to emergence (9) were noted for smaller rhizome length (2 buds) compared to longer rhizomes with 10 buds. Therefore, on the basis of our findings, saline and industrial effluent acidic, no standing water (zero water surface level) and shorter rhizome size resulted in least bud sprouting and minimized the chance of further infestation in an eco-friendly and ecological way without the use of herbicides. Whereas alkaline industrial effluents, standing water up to 4 inches and longer rhizome fragments enhanced sprouting and re-establishment of the T. latifolia and these strategies can be utilized where the aim is to grow and establish a good stand of T. latifolia for passive treatment and phytoremediation of industrial effluents, before draining the polluted water into fresh water bodies like rivers and streams.

Specific Methane Yield of Wetland Biomass in Dry and Wet Fermentation Technologies

Our study evaluated the specific methane yield (SMY) of selected wetland species subjected to wet and dry anaerobic digestion: Carex elata All. (CE), a mixture (~50/50) of Carex elata All. and Carex acutiformis L. (CA), Phragmites australis (Cav.) Trin. ex Steud. (PA), Typha latifolia L. (TL) and Phalaris arundinacea L. (PAr). Plants were harvested in late September, and therefore, the study material was characterised by high lignin content. The highest lignin content (36.40 ± 1.04% TS) was observed in TL, while the lowest (16.03 ± 1.54% TS) was found in CA. PAr was characterised by the highest hemicellulose content (37.55 ± 1.04% TS), while the lowest (19.22 ± 1.22% TS) was observed in TL. Cellulose content was comparable in almost all plant species studied and ranged from 25.32 ± 1.48% TS to 29.37 ± 0.87% TS, except in PAr (16.90 ± 1.29% TS). The methane production potential differed significantly among species and anaerobic digestion (AD) technologies. The lowest SMY was observed for CE (121 ± 28 NL kgVS−1) with dry fermentation (D–F) technology, while the SMY of CA was the highest for both technologies, 275 ± 3 NL kgVS–1 with wet fermentation (W–F) technology and 228 ± 1 NL kgVS–1 with D–F technology. The results revealed that paludi-biomass could be used as a substrate in both AD technologies; however, biogas production was more effective for W–F. Nonetheless, the higher methane content in the biogas and the lower energy consumption of technological processes for D–F suggest that the final amount of energy remains similar for both technologies. The yield is critical in energy production by the AD of wetland plants; therefore, a promising source of feedstock for biogas production could be biomass from rewetted and previously drained areas, which are usually more productive than natural habitats.

Potential Use of Plant Biomass from Treatment Wetland Systems for Producing Biofuels through a Biocrude Green-Biorefining Platform

The potential of using the biomass of four wetland plant species (Iris pseudacorus, Juncus effusus, Phragmites australis and Typha latifolia) grown in treatment wetland systems and under natural conditions were tested to produce high-value materials using hydro-thermal liquefaction (HTL). The results show that the wetland plants biomass is suitable for biocrude and biochar production regardless of the origin. The hydrothermal liquefaction products’ (biocrude, biochar, aqueous and gaseous phase) yields vary according with the specific biomass composition of the species. Furthermore, the results show that the biomass composition can be affected by the growing condition (treatment wetland or natural unpolluted conditions) of the plants. None of the single components seems to have a determinant effect on the biocrude yields, which reached around 30% for all the analyzed plants. On the contrary, the biochar yields seem to be affected by the composition of the biomass, obtaining different yields for the different plant species, with biochar yields values from around 12% to 22%, being that Phragmites australis is the one with the highest average yield. The obtained aqueous phase from the different plant species produces homogeneous compounds for each plant species and each growing environment. The study shows that biomass from treatment wetlands is suitable for biocrude production. The environmental value of this biomass lies on the fact that it is considered a residual product with no aggregated value. The treatment wetland biomass is a potential sustainable source for biofuel production since these plants do not need extra land or nutrients for growing, and the biomass does not compete with other uses, offering new sources for enhancing the bioeconomy concepts.

Plant Biomass Production in Constructed Wetlands Treating Swine Wastewater in Tropical Climates

The production of both aboveground and belowground plant biomass in constructed wetlands (CW) is a poorly understood topic, although vegetation plays an important role in the process of pollutant removal from wastewater. The objective of this study was to evaluate the aboveground and belowground biomass production of Typha latifolia and Canna hybrids in a large-scale constructed wetland treating swine wastewater in tropical climates. Parameters, such as temperature, DO, pH, COD, TSS, TN, TP, and TC, as well as destructive and non-destructive biomass, were evaluated. It was found that, despite the high concentrations of pollutants, the vegetation adapted easily and also grew healthily despite being exposed to high concentrations of pollutants from swine water. Although Typha latifolia (426 plants) produced fewer plants than Canna hybrids (582 plants), the higher biomass of the Typha latifolia species was slightly higher than that of Canna hybrids by 5%. On the other hand, the proximity of the water inlet to the system decreased the capacity for the development of a greater number of seedlings. As for the elimination of pollutants, after treatment in the constructed wetland, COD: 83.6 ± 16.9%; TSS: 82.2 ± 17.7%; TN: 94.4 ± 15.8%; TP: 82.4 ± 23.2%; and TC: 94.4 ± 4.4% were significantly reduced. These results show that wetlands constructed as tertiary systems for the treatment of swine wastewater produce a large amount of plant biomass that significantly helps to reduce the concentrations of pollutants present in this type of water in tropical areas. The use of these plants is recommended in future wetland designs to treat swine wastewater.

Pengolahan Limbah Cair Rumah Sakit dengan Metode Lahan Basah Buatan (Constructed Wetland) dan Tanaman Air Typha latifolia

<p>Utilization of the aquatic plant Typha latifolia, in the treatment of hospital wastewater with the method of an artificial wetland system (constructed wetland), is expected to be able to treat the liquid waste of health care facilities. This study aims to determine the ability of the aquatic plant Typha latifolia in degrading the parameters contained in the wastewater of health facilities using the Artificial Wetland Method. Quasi-experimental research design. The measurement of liquid waste parameters (BOD, COD, TSS, Fatty Oil, and Ammonia) is carried out by taking samples at the inlet and outlet of each pot, then analyzed in the laboratory. The study reported an average influent BOD level of 66.2mg/L, an average effluent in a circular cross-sectional pot increased by 99.6mg/L, an influent COD level of 190.8mg/L, an effluent in a rectangular pot four decreased by an average of 31.6mg/L, the influent TSS parameter was 106mg/L, the average effluent in a circular cross-sectional pot was 283.6mg/L, the influent Oil &amp; Fat parameter averaged 1.2mg/L, average effluent 1.2mg/L, ammonia influent parameter 12mg/L, effluent 2.62mg/L. The rectangular cross-section has a good ability compared to other cross-sections in reducing hospital waste, namely; BOD=64%, COD=40%, TSS=48%, Ammonia=67%, Oil and Fat parameters did not decrease because the influent parameter levels were already below the Liquid Waste quality standard. The researcher concluded that the rectangular cross-sectional pot planted with Typha latifolia could reduce the wastewater parameters better than other cross-sectional types. </p>