Abstract
The Wheat husk is one of the common wastes abundantly available in the Middle East countries especially in Iraq. The present study aimed to evaluate the Wheat husk as low cost material, eco-friendly adsorbents for the removal of the carcinogenic dye (Congo red dye) from wastewater by investigate the effect of, at different conditions such as, pH(3-10), amount of adsorbents (1-2.3gm/L),and particle size (125-1000) μm, initial Congo red dye concentration(10, 25 , 50 and 75mg/l) by batch experiments. The results showed that the removal percentage of dye increased with increasing adsorbent dosage, and decreasing particle size. The maximum removal and uptake reached (91%) , 21.5mg/g, respectively for 25 initial concentration, pH 6.7 and 1.5 g/l Wheat husk dosage. The experimental data fitted well to Langmuir isotherm mode. The kinetic data support the assumptions of chemisorption were indicates a good fitting to the pseudo-second-order model.
Highlights
Environmental pollution due to speedy development of industries causes harmful effect in human health and ecosystem
A number of studies had focused on biomaterials that are capable of removing Congo red dye from wastewater such as untreated sawdust, Alam et al,2015 ;tea waste, Foroughi-Dahr et al.,2015 ; thorn apple leaf powder; and aloe vera leaves shell, Khaniabadi et al, 2017... etc.This work aims to examine the biosorption of CR dye from aqueous solution with Wheat husk biomass (WH) under an influence of various important parameters, such as pH, temperature, and initial concentration
3.1 Fourier-Transform Infrared (FTIR) Analysis The results of the FTIR spectrum showed that different functional groups were detected on the surface of the wheat husk
Summary
Environmental pollution due to speedy development of industries causes harmful effect in human health and ecosystem. The chromophores in anionic and nonionic dyes mostly consist on azo groups or anthraquinone types, Mishra and Tripathy, 1993 Among different kinds of anionic dyes, Congo red (CR) (4-aminonaphthalene-1sulphonic acid) is a benzidine-based anionic diazo dye, which generated by some industries, including textiles, printing and dyeing, paper, rubber and plastic industries. It toxic for many organism and is doubted carcinogen and mutagen dye, Omidi et al.,2016 and its introduction to water stream are potential health, environmental, ecological concern. The biosorption kinetics has investigated the develop and an understanding of controlling reaction pathways (e.g., chemisorption vs. physisorption)
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