Adsorption capability of brewed tea waste in waters containing toxic lead(II), cadmium (II), nickel (II), and zinc(II) heavy metal ions

Abstract

Recently, the search for low-cost eco-friendly adsorbents has become one of the main objectives of researchers. The aim of this study was to test the removal of four heavy metals, namely lead (Pb), zinc (Zn), nickel (Ni) and cadmium (Cd), from a simulated watery solution using brewed tea waste as a potentially suitable adsorbent. The effects of pH levels (2.0–6.0), adsorbent amount (0.1–5.0 g), contact times (1–150 min.) were examined throughout the adsorption process. The results of the experiments showed that the heavy metals elimination yields had an inverse relationship with pH and a linear relationship between the other parameters. The optimum pH for the removal of the heavy metals was between 4.0 and 5.0 in the case of the brewed tea waste. Equilibrium times of 2, 10, 30 and 5 min were required for the adsorption of Pb, Zn, Ni, Cd onto Camellia sinensis, respectively. Based on the results of this study it can be said that brewed tea waste has a high potential to remove heavy metals from aqueous solutions. The maximum adsorption capacities were calculated as 1.197, 1.457, 1.163 and 2.468 mg/g, for Pb, Zn, Ni and Cd, respectively, by fitting the equilibrium data to the Langmuir isotherm model.

Equilibrium and Thermodynamic Investigation of Biosorption of Nickel from Water by Activated Carbon Made from Palm Kernel Chaff

“…Nickel is a naturally occurring heavy metal existing in various mineral forms and may be found throughout the environment including rivers, lakes, oceans, soil, air, drinking water, plants, and animals. Soil and sediment are the primary receptacles for nickel, but mobilization may occur depending on physico-chemical characteristics of the soil [2][3][4][5] . Nickel is used extensively in the electronic and metallurgical industries, specifically in electroplating, nickel-cadmium batteries, printed circuit boards, liquid crystal displays; and is emitted into the environment through anthropogenic sources such as fuel combustion, smelting, sewage and solid waste management and fertilizer application 1,[6][7][8][9] .…”

Investigation of Copper removal mechanisms on Quercus robur acorn caps: Equilibrium, kinetics, thermodynamic and characterization studies

“…However, they reported conformity to pseudo first-and second-order kinetic models indicating chemical adsorption in the kinetic data. Celebi et al (2020) studied on adsorption capability of low cost eco-friendly adsorbents in waters containing toxic lead (II), cadmium (II), nickel (II) and zinc (II) heavy metal ions. Van't Hoff plot was drawn to calculate the thermodynamic data (Fig.…”

Novel Three-Dimensional (3D) Carbon-Metal-Polymeric framework: Efficient removal of Chemical and Biological Contaminants

“…Contamination of water bodies by toxic HMI such as chromium (Cr), arsenic (As), lead (Pb), cadmium (Cd), and mercury (Hg) is one of the solemn threats globally due to their high toxicity to living being including human health. The existence of pollutants in water bodies has increased environmental worry worldwide due to its adverse effects on animals, plants as well as human health [1][2][3][4][5][6] .…”

“…Pseudo-second-order kinetic models were used to explain the uptake of Cr(VI) and CR dye with time. The model equation was explained as follows-(2)…”