Cucumis sativus used as adsorbent for the removal of dyes from aqueous solution

Abstract

In this article, the agricultural solid waste, Cucumis sativus (RCS) was activated by sulfuric acid (CCS) for removing typical basic dyes, crystal violet (CV) and rhodamine B (RHB) from aqueous solution. The different parameters like effect of concentration, sorbent dosage, contact time and pH were studied. Isotherm data showed that the Langmuir isotherm provided the best correlation for the adsorption of CV and RHB onto RCS and CCS. The kinetic experimental data were well fitted by the pseudo-second-order kinetic model with intraparticle diffusion being one of the rate limiting steps. It can be concluded that C. sativus, the eco friendly adsorbent, is expected to be environmentally and economically feasible for the removal of CV and RHB from aqueous solution.

Exploring the Reusability of Synthetically Contaminated Wastewater Containing Crystal Violet Dye using Tectona grandis Sawdust as a Very Low-Cost Adsorbent

“…This model has also been reported to be followed by the adsorption of CV onto other similar adsorbents, namely, agaricus bisporous 83 , alligator weed 99 , ananas comosus 84 , breadfruit skin 85 , cucumis sativus and cucumis sativus/H 2 SO 4 -modified 87 , eggshell 88 , formosa papaya seed powder 89 , grapefruit peel 71 , jackfruit leaf powder 90 , jute fibre carbon 92 , laminaria japonica 99 , rice bran 99 , rice husk/NaOH-modified 94 , sawdust 95 , syzygium cumini leaves 96 , tea dust 45 , water hyacinth 98 and wheat bran 99 . The different kinetic parameters obtained by these investigators have been compared with those of present study in Table 5 .…”

“…Further, a value of 0.7696 for 1/n as obtained from Freundlich isotherm clearly indicate a normal Langmuir isotherm and ruled out the possibility of cooperative adsorption 82 . Literature survey reveals that adsorptive decontamination of CV by other adsorbents such as agaricus bisporous 83 , ananas comosus 84 , breadfruit skin 85 , calotropis procera peel 86 , cucumis sativus and cucumis sativus/H 2 SO 4 -modified 87 , eggshell 88 , formosa papaya seed powder 89 , grapefruit peel 71 , jackfruit leaf powder 90 , jalshakti polymer 91 , jute fibre carbon 92 , natural clay mineral 93 , rice husk/NaOH-modified 94 , sawdust 95 , syzygium cumini leaves 96 , tea dust 45 , tomato plant root 97 , water hyacinth 98 has also been observed to follow Langmuir isotherm. The values of isotherm constants of this model as reported for different adsorbents are listed in Table 3 .…”

Adsorption of Dye by Waste Black Tea Powder: Parameters, Kinetic, Equilibrium, and Thermodynamic Studies

“…electron forces between adsorbents and adsorbents were involved, which likely determined the rate of reaction. Studies on biological adsorbents have reported similar kinetic fitting results [22]. To further understand the possible kinetic mechanisms, the intraparticle diffusion, Boyd, and Elovich models were considered in this study.…”

“…Based on the assumption that intermolecular forces decrease rapidly with distance, the Langmuir model describes the uniform adsorption sites and single molecule layer in adsorption [21]. Rather than changing with the surface coverage, its adsorption energy is constant [22].…”

Ecofriendly Biosorbents of Synthetic Dye Methylene Blue

“…Vegetable and fruit peels can act as good adsorbents 4,5 of dyes . Biosorbants are very attractive these days for the removal of synthetic dyes and they are economical and environmentally feasible 6 .In this study identification of various biomaterials as adsorbents is performed followed by comparison of their adsorption constants. The experimental data verifies Langmuir and Frendlich adsorption isotherms.…”