scholarly journals Comparative Studies of Carbon Materials Synthesized From Waste as Catalysts for Ozonation of Real Textile Wastewater

2021 ◽  
Author(s):  
Vijay A. Juwar ◽  
AJIT RATHOD ◽  
Shyam M. Kodape
Keyword(s):  
Agricultural Waste ◽  
Textile Wastewater ◽  
Catalyst Loading ◽  
Ozone Decomposition ◽  
Multiwalled Carbon ◽  
Effect Of Ph ◽  
Ozone Dose ◽  
Experimental Parameters ◽  
Positive Effect ◽  
Better Than

Abstract In the present work, evaluation of two catalysts, Activated carbon (AC) synthesized from agricultural waste and Multiwalled carbon nanotubes (MWCNT) synthesized from plastic waste, were done for the ozonation of real textile wastewater using para- chloro benzoic acid (p-CBA) as a probe compound. The effect of pH and catalyst dose were studied in terms of •OH exposure, Rct, rate of p-CBA degradation and ozone degradation. The rate constant for the reaction of organic matter with hydroxyl radicals was determined using competition kinetics. The threshold ozone dose for real textile wastewater was found to be 0.51 gm/gm of TOC. With an increase in specific ozone dose, the rate of p-CBA degradation was found to be increasing and has shown a positive effect on •OH exposure and Rct. The increasing pH had shown a positive effect on the rate of degradation and decomposition of p-CBA and ozone respectively in the case of AC catalyzed ozonation. A similar trend was observed in the case of MWCNTs catalyzed ozonation. A positive effect of pH was observed on •OH exposure and Rct, in AC as well as MWCNTs catalyzed ozonation. The effect of catalyst loading has shown significant enhancement in p-CBA degradation, ozone decomposition, •OH exposure and Rct in both AC as well as MWCNTs catalyzed ozonation. However, MWCNTs have proved better than AC as a catalyst for ozonation in studied experimental parameters.

scholarly journals Phenol adsorption from wastewater using cashew nut shells as adsorbent

2018 ◽  
Vol 7 (3) ◽  
pp. 966
Author(s):  
Kartik Kulkarni ◽  
Varsha Sudheer ◽  
C R Girish
Keyword(s):  
Agricultural Waste ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Multilayer Adsorption ◽  
Phenol Adsorption ◽  
Cashew Nut ◽  
Experimental Parameters ◽  
Order Kinetic Model

The potential of agricultural waste cashew nut shells as an adsorbent for removing phenol from wastewater is presented in this paper. The adsorbent was treated with 3M sulphuric acid in order to improve the properties. The experimental parameters such as adsorbent dosage, concentration and temperature were optimized with response surface methodology (RSM). The isotherm data were tested with different isotherm models and it obeyed Freundlich Isotherm showing the multilayer adsorption. The kinetic data satisfied pseudo-first order kinetic model. The maximum adsorption capacity was calculated to be 35.08 mg/g proving the capability of cashew nut shells for removing phenol from wastewater.  

scholarly journals Organising household consumption and occupational proportions

2018 ◽  
Vol 26 (4) ◽  
pp. 748-772
Author(s):  
Tolu Olarewaju
Keyword(s):  
Developing Countries ◽  
Occupational Status ◽  
Household Consumption ◽  
Quantile Regressions ◽  
Content Type ◽  
Self Employment ◽  
Causality Tests ◽  
Positive Effect ◽  
Practical Implications ◽  
Better Than

Purpose The purpose of this paper is to contribute to the occupational status and entrepreneurship research in developing countries by proposing that there are implications for household consumption depending on the occupational status proportion of households. When the occupational proportion of the household changes, household consumption is affected. This effect also changes depending on what quantile level the household is in terms of household consumption. Design/methodology/approach The paper makes use of OLS and quantile regressions to examine 6,919 households comprising 40,294 individuals from the 2009 Nigerian Living standards measurement survey. Findings The paper finds that there are implications for household consumption based on the proportion of individuals in each occupational category. The contributions of each employment proportion changes at different quantiles with self-employed individuals increasing household consumption at the lower quantiles but reducing household consumption at the upper quantiles. Crucially, having a higher proportion of unemployed individuals in the household is oftentimes better than having a higher proportion of own account self-employed individuals. Research limitations/implications This paper offers new insights into how occupation proportion influences household consumption in developing countries. As a result, the household could seek to organise its members in such a way as to maximise combined household consumption, as diverse occupational statuses contribute differently to the household consumption at different quantile levels. The nature of the data used in this study however does not allow for causality tests. Practical implications The proportion of employment statuses in the household has implications for household consumption and so the mix of employment in the household is important. The self-employed could also be involved in activities to enhance household consumption that are not captured by labour income. However, self-employment does not seem to always have a positive effect on household consumption and sometimes unemployment might be better. Originality/value The paper provides a new way to view the household as an organising entity in terms of how it can allocate employment proportions to maximise household consumption.

Empirical Equilibrium Study on Rice Husk and Eggshells as Low Cost Bioadsorbent for the Methylene Blue Removal

2014 ◽  
Vol 699 ◽  
pp. 221-226
Author(s):  
Nurul Hanim Razak ◽  
Md. Razali Ayob ◽  
M.A.M. Zainin ◽  
M.Z. Hilwa
Keyword(s):  
Methylene Blue ◽  
Rice Husk ◽  
Low Cost ◽  
Agricultural Waste ◽  
Textile Wastewater ◽  
Blue Dye ◽  
Rice Husks ◽  
Equilibrium Study ◽  
Porosity Characterization

Eggshells and rice husk, two types of notable agricultural waste were used as bioadsorbent to remove Methylene Blue dye (MBD) in aqueous solution. This study was to investigate the performance of these two bioadsorbents in removing MBD. The removal percentage, adsorption capacity, and porosity characterization were examined. The method applied was a physical filtration. UV-VIS Spectrophotometer was used to determine the efficiency of the bioadsorbents in MBD adsorption. The highest removal percentage at the most concentrated MBD were 51% and 98% for eggshells and rice husks respectively. Meanwhile the characterization of rice husks pore size and volume proves that higher adsorptivity towards dye compares to eggshells porosity. It was concluded that the eggshells and rice husks bioadsorbents was successful to treat industrial textile wastewater with rice husks as the most efficient bioadsorbent in removing MBD.

scholarly journals Tail-Heaviness, Asymmetry, and Profitability Forecasting by Quantile Regression

2020 ◽  
Author(s):  
Hui Tian ◽  
Andrew Yim ◽  
David P. Newton
Keyword(s):  
Quantile Regression ◽  
Forecast Error ◽  
Simulated Data ◽  
Ordinary Least Squares ◽  
Shape Effect ◽  
Forecasting Accuracy ◽  
Forecasting Performance ◽  
Cash Flow Forecasting ◽  
Positive Effect ◽  
Better Than

We show that quantile regression is better than ordinary-least-squares (OLS) regression in forecasting profitability for a range of profitability measures following the conventional setup of the accounting literature, including the mean absolute forecast error (MAFE) evaluation criterion. Moreover, we perform both a simulated-data and an archival-data analysis to examine how the forecasting performance of quantile regression against OLS changes with the shape of the profitability distribution. Considering the MAFE and mean squared forecast error (MSFE) criteria together, we see that the quantile regression is more accurate relative to OLS when the profitability to be forecast has a heavier-tailed distribution. In addition, the asymmetry of the profitability distribution has either a U-shape or an inverted-U-shape effect on the forecasting accuracy of quantile regression. An application of the distributional shape analysis framework to cash flow forecasting demonstrates the usefulness of the framework beyond profitability forecasting, providing additional empirical evidence on the positive effect of tail-heaviness and supporting the notion of an inverted-U-shape effect of asymmetry. This paper was accepted by Shiva Rajgopal, accounting.

scholarly journals Can Treadmill Slip-Perturbation Training Reduce Longer-Term Fall Risk Upon Overground Slip Exposure?

2020 ◽  
Vol 36 (5) ◽  
pp. 298-306 ◽  
Author(s):  
Anna Lee ◽  
Tanvi Bhatt ◽  
Xuan Liu ◽  
Yiru Wang ◽  
Shuaijie Wang ◽  
...  
Keyword(s):  
Older Adults ◽  
Fall Risk ◽  
Center Of Mass ◽  
Control Group ◽  
Initial Training ◽  
Single Session ◽  
Control Groups ◽  
Perturbation Training ◽  
Positive Effect ◽  
Better Than

The purpose was to examine and compare the longer-term generalization between 2 different practice dosages for a single-session treadmill slip-perturbation training when reexposed to an overground slip 6 months later. A total of 45 older adults were conveniently assigned to either 24 or 40 slip-like treadmill perturbation trials or a third control group. Overground slips were given immediately after initial training, and at 6 months after initial training in order to examine immediate and longer-term effects. The performance (center of mass stability and vertical limb support) and fall percentage from the laboratory-induced overground slips (at initial posttraining and at 6 mo) were measured and compared between groups. Both treadmill slip-perturbation groups showed immediate generalization at the initial posttraining test and longer-term generalization at the 6-month retest. The higher-practice-dosage group performed significantly better than the control group (P < .05), with no difference between the lower-practice-dosage and the control groups at the 6-month retest (P > .05). A single session of treadmill slip-perturbation training showed a positive effect for reducing older adults’ fall risk for laboratory-induced overground slips. A higher-practice dosage of treadmill slip perturbations could be more beneficial for further reducing fall risk.

scholarly journals Product Line Diversification and Its Impact on Firm Performance

2021 ◽  
Vol 5 (3) ◽  
pp. 43-58
Author(s):  
Zia ur Rehman ◽  
Asad Khan ◽  
Rafique Ahmed Khuhro ◽  
Abdul Ghafoor Khan
Keyword(s):  
Firm Performance ◽  
Financial Performance ◽  
Product Line ◽  
Group Affiliation ◽  
Firm Profitability ◽  
Business Line ◽  
Diversified Firms ◽  
The Impact ◽  
Positive Effect ◽  
Better Than

The objective of the study is to measure product diversification’s impact on insurance firm’s financial performance in Pakistan. Analysis are carried out to examine how ownership structure, capitalization, group membership, firm size, diversification across business lines, industry concentration affects firm’s financial performance. Data from 2009-2019 is collected to measure the impact of diversification (entropy) on the risk- adjusted returns. Findings of the study reveal that business line diversification has strong positive effect on firm performance (for both ROA and ROE) which means that diversified firms perform better than non-diversified firms. For managers these findings are useful as they propose the need for diversification, capitalization, increase in size and group affiliation to enhance firm profitability.

scholarly journals Ekstraksi dan Uji Stabilitas Zat Warna Alami dari Bayam Merah (Alternanthera amoena Voss)

KOVALEN ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 212-217
Author(s):  
Khairuddin ◽  
Joy Noldy Baciang ◽  
Indriani ◽  
Nov Irmawati Inda
Keyword(s):  
Sun Exposure ◽  
Natural Dye ◽  
Natural Dyes ◽  
Stability Test ◽  
Stability Testing ◽  
Effect Of Ph ◽  
Color Degradation ◽  
The Stability ◽  
Better Than

Research on the extraction and stability test of natural dye from red spinach (Alternanthera amoena Voss) has been carried out. This study aims to determine the effect of pH and length of sun exposure on the stability of the dye from red spinach. Extraction using the maceration method with ethanol solvent and measurement using a UV-Vis spectrophotometer. Stability testing is carried out at pH 2-5 and sun exposure for 1-4 hours using a dark and light container. The results obtained, at pH 2 and pH 3, anthocyanins were more stable, compared to pH 4 and 5 which had greater color degradation. In exposure to sunlight, dark containers with a degradation percentage of 31.70% were better than clear containers with a percentage of 48.78%. Keywords: Anthocyanin, red spinach, natural dyes stability.

scholarly journals PENGARUH KONSENTRASI IBA (Indole Butyric Acid) DAN LAMA PENCELUPAN STEK TERHADAP PERTUMBUHAN GERMINATIF RUMPUT RAJA (Pennisetum purpurephoides)

2020 ◽  
Vol 7 (2) ◽  
pp. 83-87
Author(s):  
Ch. W. Patty
Keyword(s):  
Butyric Acid ◽  
Growth And Development ◽  
Elephant Grass ◽  
Indole Butyric Acid ◽  
Know How ◽  
Immersion Period ◽  
Type 3 ◽  
Positive Effect ◽  
Range Test ◽  
Better Than

King grass is parenenial plant that grow slower then elephant grass.  The growth and development of the  plant breed effected by development of the clone so that some efforts must be taken  to stimulate germinative  development of king grass. The research purposed to know how for the level of IBA  consentration and immersion period of the slip of plant has an effect  toward the growth of germination of king grass. Complete randomizet design of factorial type 3 x 3 and Duncan’s multiple range test, were used in the experiment. The treatments  were used  in the eksperiment: K1 (100 ppm of concentration), K2 (200 ppm of concentration), K3 (300 ppm of concentration), W1 (one hours of immersion  period), W2 (two hours of immersion  period), W3 (Three hours of immersion  period). The result of this research  showed that amount the treatments gave significant effect to the percentation of buds, number of buds, height of plant, number of roots, length of root. Nevertheless, there  was an inccclination that the more  the height of consentration  level was given, the result would better than the research. It can be concluded that the level of IBA consentration and immersion period  had a positive effect influences which from the  average result obtained K3W3 gave the heighest percentation of buds appear, number of buds, height of plant and length of roots. While persentation  of buds to appear, number of buds, height of buds and the lowest roots length founded in K1W1.

The Effect of Corporate Sustainability Practices on Financial Performance

2019 ◽  
pp. 52-70 ◽  
Author(s):  
Ibrahim Yasar Gok ◽  
Ozan Ozdemir ◽  
Bugra Unlu
Keyword(s):  
Financial Performance ◽  
Manufacturing Industry ◽  
Corporate Sustainability ◽  
Control Sample ◽  
Corporate Financial Performance ◽  
Performance Variables ◽  
Sustainability Practices ◽  
The Impact ◽  
Positive Effect ◽  
Better Than

In this chapter, the impact of corporate sustainability practices (CSP) on corporate financial performance (CFP) is investigated in terms of Turkish manufacturing industry. In this context, 16 sustainable companies vs. 21 control companies in 2016 and 16 sustainable companies vs. 24 control companies in 2017 are examined. Thirty-seven financial performance variables within seven groups are used, and non-parametric Mann-Whitney U test is applied. In 2016, four out of seven significant variables point out that sustainable companies perform better than control sample; however, in 2017, three out of four significant variables indicate the opposite. Therefore, the results are mixed, and it is concluded that implementing environmental, social, and governance (ESG) criteria do not have a noticeable positive effect on financial performances of manufacturing industry companies, at least in the short-term.

Treatment of textile wastewater by agricultural waste biomasses

2021 ◽  
pp. 137-156
Author(s):  
Pintu Pandit ◽  
Kunal Singha ◽  
Subhankar Maity ◽  
Saptarshi Maiti ◽  
Prerana Kane
Keyword(s):  
Agricultural Waste ◽  
Textile Wastewater
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