Pollution indicators of coconut husk retting areas in the kayals of Kerala

Nandan, S. Bijoy; Azis, P.K.A.

doi:10.1080/00207239508710939

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…From the season wise analysis, monsoon was observed highest density of rotifers than post-monsoon and pre-monsoon. Nandan (1991), Harikrishnan (1993) and Anuradha (1996) documented the presence and density of rotifers in various brackish water locations of southern Kerala while, studying the plankton communities in these areas. The distribution and abundance of the rotifer population in a particular aquatic ecosystem are significantly influenced by environmental factors.…”

Section: Quantitative Distributionmentioning

confidence: 99%

Diversity of Planktonic Rotifers from Enamakkal Lake, Kerala, India

Meharban,

John

2023

Intern. J. Zool. Invest.

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Zooplankton occupy the central ecological position in the aquatic food web. They are known as staple food item of fishes especially the larvae of fishes. Rotifers are among the major groups of zooplankton. The present investigation was carried out in Enamakkal lake (Lat. 10.5059°N and Long. 76.0848° E) at Thrissur District, Kerala, India. The planktonic rotifers diversity was studied for a period of one year from October-2018 to September-2019. During the present study, 10 genera of planktonic rotifers were recorded. Out of the 10 genera, Brachionus was recorded from all months and it formed the dominant rotifer in all seasons. In monsoon the diversity of Rotifers was greater than that of pre-monsoon and post-monsoon. Among the various species encountered during the present study, the maximum diversity and abundance were seen in the Brachionus sp., represented by 11 different species in monsoon. In pre-monsoon only Brachionus sp. was present. In pre-monsoon and post-monsoon B. rotundiformis and B. plicatilis were the abundant species.

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Section: Quantitative Distributionmentioning

confidence: 99%

Diversity of Planktonic Rotifers from Enamakkal Lake, Kerala, India

Meharban,

John

2023

Intern. J. Zool. Invest.

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“…Locally available lignocellulosic wastes such as coconut husk have good potentials for producing highly porous low-cost adsorbent for the removal of pollutants from the aqueous mediums [48,71,72]. The use of coconut husk for preparing activated carbon provides useful alternatives for the application of coconut husk in major coconut-producing countries like Brazil, India, Thailand, Indonesia, the Philippines, and Sri Lanka that often have to deal with the organic matter disposal as well as copious phenolic compound emissions from these wastes [13,47,54,55].…”

Section: Introductionmentioning

confidence: 99%

Nitrate removal from groundwater using chemically modified coconut husk based granular activated carbon: characterization of the adsorbent, kinetics and mechanism

Huno

Das

Hullebusch

et al. 2022

Syst Microbiol and Biomanuf

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In this study, a highly porous chemically activated granular activated carbon (GAC) was prepared from coconut husk and tested as an adsorbent to remove nitrate from contaminated groundwater. The prepared GAC was characterized by Fouriertransform infrared spectroscopy (FTIR), thermogravimetric and differential thermal analysis (TGA/DTA), scanning electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) surface area (S BET ) analysis. The effects of various process parameters such as initial nitrate concentration, contact time and adsorbent dose on nitrate removal efficiency (response) by the modified GAC were investigated using the statistically significant response surface methodology and Box-Behnken design of experiments. The experimental data were fitted to well-known adsorption isotherms and kinetic models to ascertain the mechanism of the adsorption process. Analysis of variance (ANOVA) was performed to determine the significance of the individual and the interactive effects of process variables on the response. The BET surface area (S BET ) and micropore volume of the prepared GAC from coconut husk was 1120 m 2 /g and 0.392 cm 3 /g, respectively. The experimental results showed that physisorption was the main adsorption mechanism governing the process, while the rate of adsorption was limited at initial nitrate concentrations > 10 mg/L. The Langmuir mono-layer adsorption isotherm best fitted the experimental data with a maximum adsorption capacity of 6.0 ± 1.3 mg/g (~ 92.5%) with an adsorbent dose of 0.1 g/50 mL, an equilibrium time of 6 h at 28 ± 2 °C, and at pH 7.6 (± 0.2). Among the tested process variables, the adsorbent dose and initial nitrate concentration showed significant effects on the nitrate removal efficiency.

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“…It has led to the emergence of the coir industry. The retting process causes extensive damage to the Kayals of Kerala and the aquatic habitats along the southwest coast of India due to oxygen depletion and high concentrations of hydrogen sulphide [7,8].…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of the quality of concrete blocks produced from coconut fibre, oil palm empty fruit bunch, and rice husk as filler material

et al. 2018

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Abstract. The accumulation of coconut fibre (CF), oil palm empty fruit bunch (OPEFB), and rice husks (RH) every year can reduce the fertility of soil and water absorption, and causes water acidification. Waste utilization as a filler material of concrete blocks was discussed in this research. Experimental design was used by comparing the quality of concrete blocks based on 36 specimens with varied compositions of waste (1%, 2%, 3%, and 4% by dry weight of total sand) and 3 specimens (0%) as control specimens with 3 replications for each composition. The quality of paving blocks was determined based on the testing of water absorption, porosity, compressive strength, and density. The results revealed that the quality of concrete blocks with the composition of CF (1% and 2%), OPEFB (1% and 2%), and RH (1%) meet the requirements of SNI 03-0691-1996 criteria in category B for parking paver and the maximum composition of each waste materials (3% and 4%) still comply SNI 15-2094-2000 in class 100 and 150 for the block walls. Statistical analysis revealed that the best treatments for compressive strength was RH (1%) and for water absorption it was RH (2%) and CF (4%).

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Pollution indicators of coconut husk retting areas in the kayals of Kerala

Cited by 5 publications

References 3 publications

Diversity of Planktonic Rotifers from Enamakkal Lake, Kerala, India

Diversity of Planktonic Rotifers from Enamakkal Lake, Kerala, India

Nitrate removal from groundwater using chemically modified coconut husk based granular activated carbon: characterization of the adsorbent, kinetics and mechanism

A comparative analysis of the quality of concrete blocks produced from coconut fibre, oil palm empty fruit bunch, and rice husk as filler material

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