Environmental challenge vis a vis opportunity: The case of water hyacinth

Malik, Anushree

doi:10.1016/j.envint.2006.08.004

Cited by 446 publications

(318 citation statements)

References 110 publications

Supporting

Mentioning

299

Contrasting

Unclassified

Order By: Relevance

“…Water hyacinth has a high cellulosic content (40.0-65.0%) (Malik, 2007;Nigam, 2002) with extremely high growth rate (140 ton/ha. year, dry wt.)…”

Section: Resultsmentioning

confidence: 99%

“…Cellulose related polysaccharides are considered to be a major component of water hyacinth (Malik, 2007;Nigam, 2002;Mukherjee and Nandi 2004;Ingole and Bhole, 2002). The plant body contains 26.3 wt% C-6 sugars such as glucose (19.8%) and galactose (6.5%) and 20.5 wt% C-5 sugars with 11.5 wt% xylose and arabinose (Girisuta et al, 2008;Aswathy et al, 2010).…”

Section: Effect Of Acid Concentration On Hydrolysismentioning

confidence: 99%

See 1 more Smart Citation

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Muhammad

Adnan

Bokhari

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-To change the recalcitrant nature of the lignocellulosic material for maximum hydrolysis yield, a comprehensive study was done by using sulphuric acid as an exclusive catalyst for the pretreatment process. The enzymatic digestibility of the biomass [Water Hyacinth: Eichhornia crassipes] after pretreatment was determined by measuring the hydrolysis yield of the pretreated material obtained from twenty four different pretreatment conditions. These included different concentrations of sulphuric acid (0.0, 1.0, 2.0 and 3.0%), at two different temperatures (108 and 121 °C) for different residence times (1.0, 2.0 and 3.0h).The highest reducing sugar yield (36.65 g/L) from enzymatic hydrolysis was obtained when plant material was pretreated at 121 °C for 1.0 h residence time using 3.0% (v/v) sulphuric acid and at 1:10 (w/v) solid to liquid ratio. The total reducing sugars obtained from the two-stage process (pretreatment + enzymatic hydrolysis) was 69.6g/L. The resulting sugars were fermented into ethanol by using Saccharomyces cerevisiae. The ethanol yield from the enzymatic hydrolyzate was 95.2% of the theoretical yield (0.51g/g glucose), as determined by GS-MS, and nearly 100% since no reducing sugars were detected in the fermenting media by TLC and DNS analysis.

show abstract

“…Water hyacinth has a high cellulosic content (40.0-65.0%) (Malik, 2007;Nigam, 2002) with extremely high growth rate (140 ton/ha. year, dry wt.)…”

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Acid Concentration On Hydrolysismentioning

confidence: 99%

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Muhammad

Adnan

Bokhari

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…It has a wide distribution in tropical, subtropical and warm temperate regions throughout the world (Gopal, 1987;Penfound & Earle, 1948). In waters with warm temperatures and sufficient nutrients, the plants double in number and biomass in 4-10 days (Malik, 2007). It is regarded as one of the most problematic aquatic weeds and has attracted worldwide attention due to its fast spread and congested growth, which lead to serious problems in navigation, irrigation and power generation.…”

Section: Littoral Of Lake Atitlan and Lake Macrophytesmentioning

confidence: 99%

Regime shift in the littoral ecosystem of volcanic Lake Atitlán in Central America: combined role of stochastic event and invasive plant species

et al. 2018

View full text Add to dashboard Cite

Different functional groups of macrophytes vary in their impact on aquatic ecosystem structure and processes. The introduction of new species with different growth form, combined with a stochastic event, may have serious and irreversible consequences on lake functioning. Our goals were to document and explain physical, chemical, metabolic and biotic changes in the littoral zones of a volcanic lake before and following two coinciding events: invasion by a submersed macrophyte, Hydrilla verticillata (Hydrocharitaceae), followed by a rapid increase in the lake water level (>2.5 m). We recorded plant biomass, plant tissue C:N:P stoichiometry, macroinvertebrates, water characteristics data along transects through littoral zones, and measured gas emission in controlled mesocosms and in the lake. The native emergent species, Schoenoplectus californicus (Cyperaceae), was generally not able to survive such a rapid water level increase, and Hydrilla spread and formed dense mats further preventing Schoenoplectus regeneration. The impact of another introduced species, the free‐floating Eichhornia crassipes (Pontederiaceae), was more localised, despite its much longer presence at the lake. Although the three species had comparable standing biomass, the two invader species had lower C:N:P ratios than Schoenoplectus, resulting in faster decomposition rates and indicating potential shifts in nutrient cycling within the ecosystem. The oxygen profile of the water column was altered by the non‐native species in a significantly different manner: in Eichhornia, the saturation concentrations dropped down to 30%–50% of dissolved oxygen, while oxygen supersaturation was recorded in Hydrilla. Both Schoenoplectus and Eichhornia patches exhibited comparable carbon dioxide (CO2) fluxes, sequestering 230 and 300 mg CO2 m−2 hr−1, respectively, during the day and emitting 250 and 200 mg CO2 m−2 hr−1, respectively, during the night. Contrary to these two species, Hydrilla patches sequestered CO2 during the day (34 mg CO2 m−2 hr−1) and night (44 mg CO2 m−2 hr−1). The invasive species maintained a richer community of macroinvertebrates compared to several native species (excluding Schoenoplectus), both in taxa diversity and in numbers of individuals. When the results are considered in the regional context, an increase in nutrient supply could lead to the dominance of free‐floating plants. We discussed management options more broadly considering the negative impacts of introduced species balanced against their beneficial effects, in the context of environmental changes.

show abstract

“…Therefore, it has the ability to rapidly cover a pond surface. In fact, its growth can double in 6 to 28 days and weigh up to 270 to 400 t per hectare (Epstein 1998;Malik 2007). On the other hand, water hyacinth roots contain high cellulose polymer that could be used to produce cellulose membranes (Istirokhatun et al 2015) and cellulose nanofibers (Sundari and Ramesh 2012) as a cheap material.…”

Section: Introductionmentioning

confidence: 99%

“…Solms) can be found in garden ponds around tropical and subtropical regions around the world (Zhang et al 2010) and is widely known to cause problems with floating plants (Villamagna and Murphy 2010). According to its extensive root system, the water hyacinth root can consume large amounts of chemical pollutants in the water (Malik 2007). Therefore, it has the ability to rapidly cover a pond surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of UV-C radiation and vapor released from a water hyacinth root absorbent containing bergamot oil to control mold on storage of brown rice

Songsamoe

Matan

2016

J Food Sci Technol

View full text Add to dashboard Cite

The aims of this study were to develop absorbent material from a water hyacinth root containing bergamot oil and to improve its antifungal activity by using ultraviolet C (UV-C) against the growth of A. flavus on the brown rice. Process optimization was studied by the immersion of a water hyacinth root into a water and bergamot oil (300, 500 and 700 μl ml −1 ). The root (absorbent material) was dried at 50, 70, and 90°C for 10 min. Then, ultraviolet C (UV-C) was used for enhancing the antifungal activity of bergamot oil for 10, 15, and 20 min. The shelf-life of the brown rice with the absorbent after incubation at 25°C with 100 % RH for 12 weeks was also investigated. A microscope and a Fourier transform infrared spectroscopy (FTIR) were used to find out possible mode of action. Results indicated that the absorbent material produced from the water hyacinth root containing bergamot oil at 500 μl ml −1 in the water solution, dried at 70°C and UV for 15 min showed the highest antifungal activity in a vapor phase against A. flavus on the brown rice. A microscopy investigation confirmed that the water hyacinth root could absorb bergamot oil from an outside water solution into root cells. Limonene in vapor phase was shown to be a stronger inhibitor than essential oil after UV-C radiation and should be the key factor in boosting bergamot oil antifungal activity. A vapor phase of bergamot oil could be released and inhibit natural mold on the surface of the brown rice for up to 12 weeks; without the absorbent, mold covered the brown rice in only 4 weeks.

show abstract

Environmental challenge vis a vis opportunity: The case of water hyacinth

Cited by 446 publications

References 110 publications

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Production of fermentable sugars by combined chemo-enzymatic hydrolysis of cellulosic material for bioethanol production

Regime shift in the littoral ecosystem of volcanic Lake Atitlán in Central America: combined role of stochastic event and invasive plant species

Effect of UV-C radiation and vapor released from a water hyacinth root absorbent containing bergamot oil to control mold on storage of brown rice

Contact Info

Product

Resources

About