Performance evaluation of agricultural drainage water using modeling and statistical approaches

Nasr, Mahmoud; Zahran, Hoda Farouk

doi:10.1016/j.ejar.2016.04.006

Cited by 22 publications

(5 citation statements)

References 20 publications

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“…The three PCs represented 100% of the total variance in dye-irradiations (Supplementary Table S2). Statistical analyses were performed using the functions "anova2" and Statistics Toolboxes, and "pca" and "pca-cov" in MATLAB R2015a (Nasr & Zahran, 2016;Nasr, et al, 2017), using a 95% confidence limit (p=0.05).…”

Section: Discussionmentioning

confidence: 99%

Enhancing C. reinhardtii growth and metabolite biosynthesis using organic dyes as spectral convertors

Ramanna

Nasr

Rawat

et al. 2023

Preprint

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The commercial success of microalgal systems has to a large extent been restricted due to limited light availability and utilisation. Algae utilize the blue and red spectral regions, large amounts of the incoming light energy fall outside this region and remain unused. The spectral conversion of unusable to usable wavelengths will increase the amount of radiation available for photosynthesis. This study was conducted to determine the optimum organic dye among Lumogen Red (LR), Rhodamine 8G (R8G), and Lumogen Yellow (LY) as spectral converters, providing the best light utilisation efficiency in an algal system. The microalga Chlamydomonas reinhardtii was cultivated in double-jacketed cylindrical photo-bioreactors (PBRs) stimulated using 30% UV-a and 5% UV-b fluorescent tubes. Carbohydrate and lipid contents were produced early in the growth phase, whereas biomass and protein content increased after day 4. The LR dye maintained better photo-stability compared to R8G and LY, which displayed a slight wavelength shift and photo-degradation, respectively. The improved biomass production in the LR-assisted PBR was illustrated by increased Y(II), with decreasing Y(NPQ), total chlorophylls, and carotenoids. Pigment biosynthesis was initially increased and then reduced to compensate for the increased irradiation as a means of photoprotection. Gene expression studies showed that algae grown under LR had a 1.6- and 2.9-fold up-regulation of the RuBisCo gene. The applicability of the dye-based algal system was linked to enhanced growth, lipid, protein, carbohydrate, and pigment productions. Moreover, the environmental, economic, and social aspects of improving microalgal cultivation using dye-based wavelength conversion systems were interlinked to the sustainable development goals.

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Section: Discussionmentioning

confidence: 99%

Enhancing C. reinhardtii growth and metabolite biosynthesis using organic dyes as spectral convertors

Ramanna

Nasr

Rawat

et al. 2023

Preprint

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“…Correlation analysis was performed to understand the relationship among metal pairs. Principal component analysis (PCA) was carried out to identify the principal sources of variation in the data set due to interrelated variables [ 16 ]. Two multivariate statistical techniques were employed, the PCA and the HCA (Hierarchical Cluster Analysis).…”

Section: Methodsmentioning

confidence: 99%

Heavy metal contamination in the complete stretch of Yamuna river: A fuzzy logic approach for comprehensive health risk assessment

et al. 2022

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River Yamuna is one of the most sacred major tributaries of river Ganga. This study aimed to assess the level of heavy metals in monsoon and non-monsoon season in river Yamuna in Uttar Pradesh, India and to assess the possible source of contamination and its associated health risk. Except for iron (Fe), the mean levels of all metals were within drinking water safe limits in both seasons. Except for chromium (Cr), lower values were observed for other metals in the monsoon season could be attributed dilution effect. Multivariate analysis indicated that both geogenic and anthropogenic sources contribute to heavy metals in river Yamuna in monsoon and non-monsoon seasons. The health risk in terms of hazard index (HI) and fuzzy-logic hazard index (FHI) demonstrated that both HI and FHI values among children exceeded the safe limit in most of the sites in non-monsoon seasons and in few in monsoon season. For adults, HI and FHI values were within safe limit.

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“…A dendrogram is a tree diagram that illustrates the arrangement of the clusters produced by hierarchical clustering. Ward's minimum variance hierarchical linkage method is employed to construct the similarity levels [9].…”

Section: Cluster Analysismentioning

confidence: 99%

Multivariate statistical analysis and water quality index to assessment water quality in lakes

Seif¹,

Moustafa²,

Elbarqi³

2018

Seventh International Conference on Advances in Bio-Informatics, Bio-Technology and Environmental Engineering - ABBE 2018

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This study concerns using Multivariate statistical analysis to handle the large complex datasets in lakes and use water quality index factor to estimate the water quality in lakes. This study investigated the seasonal and spatial variations of water quality parameters in Burullus Lake in Egypt as a case study. Significant seasonal changes (p < 0.05) were observed in temperature, pH and phosphate (PO 4-P), whereas significant spatial differences (p < 0.05) were detected in pH, salinity, dissolved oxygen (DO), ammonium-nitrogen (NH 4-N), nitrite-nitrogen (NO 2-N), nitrate-nitrogen (NO 3-N), PO 4-P, silicate (SiO 4) and Chlorophyll-a (Chl-a). The water quality index (WQI) estimated using the inputs of: salinity, DO, NH 4-N, NO 3-N, PO 4-P, and Chl-a. The (WQI) of the lake was rated as "Bad" to "Very bad". Based on principal component analysis (PCA), the first principal component (PC1: 38.78%) represented high loadings on NH 4-N: 0.46, NO 3-N: 0.45, and PO 4-P: 0.45, indicating that the lake was mainly influenced by nutrients concentrations coming from agricultural lands. The results from cluster analysis and a dendrogram indicated that Burullus Lake was mainly influenced by spatial variations rather than seasonal changes.

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Performance evaluation of agricultural drainage water using modeling and statistical approaches

Cited by 22 publications

References 20 publications

Enhancing C. reinhardtii growth and metabolite biosynthesis using organic dyes as spectral convertors

Enhancing C. reinhardtii growth and metabolite biosynthesis using organic dyes as spectral convertors

Heavy metal contamination in the complete stretch of Yamuna river: A fuzzy logic approach for comprehensive health risk assessment

Multivariate statistical analysis and water quality index to assessment water quality in lakes

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