Improvement of water quality by water hyacinth (Eichhornia crassipes(Mart.) Solms) for the removal of nutrient salts. I. Effects of environmental conditions on growth rate and phosphorus uptake rate of water hyacinth.

Water hyacinth (Eichhornia crassipes) is an invasive species that has modified ecosystem functioning in the Sacramento-San Joaquin Delta (Delta), California, USA. Studies in lakes and rivers have shown that water hyacinth alters water quality. In tidal systems, such as the Delta, water moves back and forth through the water hyacinth patch so water quality directly outside the patch in either direction is likely to be impacted. In this study, we asked whether the presence or treatment of water hyacinth with herbicides resulted in changes in water quality in this tidal system. We combined existing datasets that were originally collected for permit compliance and long-term regional monitoring into a dataset that we analyzed with a before-after control-impact (BACI) framework. This approach allowed us to describe effects of presence and treatment of water hyacinth, while accounting for seasonal patterns in water quality. We found that although effects of treatment were not detectable when compared with water immediately upstream, dissolved oxygen and turbidity became more similar to regional water quality averages after treatment. Temperature became less similar to the regional average after treatment, but the magnitude of the change was small. Taken together, these results suggest that tidal hydrology exports the effects of water hyacinth upstream, just as river flow is known to transport the effects downstream, creating a buffer of altered water chemistry around patches. It also suggests that although water hyacinth has an effect on dissolved oxygen and turbidity, these parameters recover to regional averages after treatment.

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Phytoremediation of iron in ex-sand mining waters by water hyacinth (Eichhornia crassipes)

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d220238 ◽

2021 ◽

Vol 22 (2) ◽

Author(s):

Qadar Hasani ◽

NIKEN T.M. PRATIWI ◽

YUSLI WARDIATNO ◽

HEFNI EFFENDI ◽

ARTHO NUGRAHA MARTIN ◽

...

Keyword(s):

Water Quality ◽

Water Hyacinth ◽

Water Surface ◽

Eichhornia Crassipes ◽

Surface Coverage ◽

Translocation Factor ◽

Mining Area ◽

Sand Mining ◽

High Concentration ◽

Water Hyacinths

Hasani Q, Pratiwi NTM, Wardiatno Y, Effendi H, Martin AN, Efendi E, Pirdaus P. 2020. Phytoremediation of Iron (Fe) in Ex-sand Mining Waters by Water Hyacinth (Eichhornia crassipes (Mart.) Solms). The high concentration of iron (Fe) has allegedly caused the water quality of puddles at sand mining area. The poor water quality, in which high contentrations of iron will to a reduction in aquaculture production. This study verified the ability of water hyacinths (Eichhornia crassipes (Mart.) Solms.)) as a phytoremediation agent for iron (Fe) concentration in water at the sand mining area, in East Lampung Regency, Indonesia. The study was carried out with 3 treatments and 3 replication each, including the treatment of (i) 25% water surface coverage, (ii) 50% water surface coverage, and (iii) 75% water surface coverage of water hyacinth. Measurement of Fe concentrations, bioconcentration factor (BCF) and translocation factor (TF) once a week, until Fe concentrations in water are adequate for aquaculture. This was achieved for 21 days. The results showed that the highest percentage reduction of Fe (97.49%) was observed at water hyacinth cover area 50%. The highest value of BCF was 2385.51, while the highest TF was 1.14 in stems and 1.02 in leaves. The results of this study open up opportunities for use water in ex-sand mining areas for aquaculture by the community and its management by the Government of East Lampung Regency, Lampung, Indonesia.

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Improvement of water quality by water hyacinth (Eichhornia crassipes (Mart.) Solms) for the removal of nutrient salts. II Simulation analysis for the phosphorus and nitrogen removal by means of water hyacinth cultivation.

Japan journal of water pollution research ◽

10.2965/jswe1978.8.358 ◽

1985 ◽

Vol 8 (6) ◽

pp. 358-366

Author(s):

Tsutomu IMAOKA ◽

Seiji TERANISHI

Keyword(s):

Water Quality ◽

Nitrogen Removal ◽

Water Hyacinth ◽

Eichhornia Crassipes ◽

Simulation Analysis

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Uptake of Nitrogen and Phosphate, and Water Purification by Water Hyacinth Eichhornia Crassipes (Mart.) Solms

Water Science & Technology ◽

10.2166/wst.1993.0141 ◽

1993 ◽

Vol 28 (7) ◽

pp. 47-53 ◽

Cited By ~ 10

Author(s):

Isao Aoyama ◽

Hisao Nishizaki

Keyword(s):

Mathematical Model ◽

Growth Rate ◽

Water Purification ◽

Water Hyacinth ◽

Eichhornia Crassipes ◽

Total Yield ◽

Dry Weight ◽

Phosphate Content ◽

Relative Growth ◽

The Relationship

Water hyacinth (Eichhornia crassipes (Mart.) Solms) grows very vigorously and has a high content of nutrients. Cultivation experiments were conducted on water hyacinth to check whether it is worth using for water purification and to obtain guiding principles for the practical use of water hyacinth grown in natural water channels or ponds. The average dry weight, nitrogen and phosphate content in the biomass were 5.0%, 2.5% and 0.57%, respectively. The growth rate of the water hyacinth was higher from May to June than in other seasons. The logarithmic regression equation between the growth rate (Y) and solar radiation (X) was expressed by Ln (Y) = 0.0042X-4.92 with a coefficient of correlation of 0.768. The relationship between the concentration of nutrients in water (X) and in water hyacinth (Y) is expressed by Y = Cmax.X/(Ks+X). The relationship between the relative growth rate and the concentration of nutrients was also expressed by the same type of equation. The relationship between a harvesting interval and the total yield of the water hyacinth within a given period was expressed by a mathematical model. It was made clear from the model that the shorter the harvesting interval was, the more the total yield of the crop increased.

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