Adsorption of Heavy Metal From Constituent Waste Water by Tea Waste Adsorbent (original) (raw)
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Heavy metal adsorption to tea waste
Bolgoda Plains
When the cool morning breeze seeps through the window, sipping a warm cup of tea breathes life into your body and heart. Yet, the tea dregs that remain are a mere afterthought miserably lying at the bottom of a waste basket. However, the dregs that we consider waste can be used to address a significant problem in the country—heavy metal contamination.
2018
Heavy metals in particular are a group of pollutants of major concern in the aquatic environment due to their toxicity. The need to find an inexpensive and effective method for heavy metals abatement from water becomes inevitable. Adsorption is very effectively used technique for this purpose but cost is an important parameter and the types of adsorbents conventionally used are expensive. This work aims to evaluate the adsorption of some heavy metals on waste tea leaves as a cheap purification method. In this experimental study, thermo modified prepared waste tea leaves are used as adsorbent for the removal of heavy metals from aqueous solutions. Adsorption experiments were carried out as batch studies at different contact time, pH, amount of adsorbent, initial metal concentration and temperature. The objective of this study is to use the tea waste as a low cost adsorbent for the removal of metal concentration in various waste waters of industry effluents etc. The effect of variatio...
Industrial waste constitutes the major source of various kinds of metal pollution in natural water. There are at least 20 metals which cannot be degraded or destroyed. The important toxic metals are Cu, Ni and Zn. There are numerous methods currently employed to remove and recover the metals from our environment and many physico-chemical methods have been proposed for their removal from wastewater. Adsorption is one of the alternatives for such cases and is an effective purification and separation technique used in industry especially in water and wastewater treatments. Cost is an important parameter for comparing the adsorbent materials. Therefore, there is increasing research interest in using alternative low-cost adsorbents. The use of tea waste as the low-cost adsorbents was investigated as a replacement for current costly methods of removing heavy metal ions from aqueous solutions. The experiment results showed that maximum removal of Nickel ion by tea waste is 94% and for Copp...
STUDIES ON ADSORPTIVE REMOVAL OF HEAVY METAL (CU, CD) FROM AQUEOUS SOLUTION BY TEA WASTE ADSORBENT
Huge Industrial waste constitutes the major source of various kinds of metal pollution in natural water. There are at least 20 metals which cannot be degraded or destroyed. The important toxic metals are Cu, and Cd. There are numerous methods currently employed to remove and recover the metals from our environment and many physico-chemical methods have been proposed for their removal from wastewater. Adsorption is one of the alternatives for such cases and is an effective purification and separation technique used in industry especially in water and wastewater treatments. Cost is an important parameter for comparing the adsorbent materials. Therefore, there is increasing research interest in using alternative low-cost adsorbents. The use of tea waste as the low-cost adsorbents was investigated as a replacement for current costly methods of removing heavy metal ions from aqueous solutions. The experiment results showed that maximum removal of copper and cadmium ion by tea waste is 89% and 87% respectively at optimum condition.
Tea Waste as a low cost adsorbent for the removal of Cu, Fe, Ni metals
Rapid industrialization has led to increase disposal of heavy metals into the environment. The tremendous increase in use of heavy metals over the past few decades has inevitably resulted in an increased flux of metallic substances in the aquatic environment. There are numerous methods currently employed to remove and recover the metals from our environment and many physico-chemical methods have been proposed for their removal from wast ewater. Adsorption is one of the alternatives for such cases and is an effective purification and separation technique used in industry especially in water and waste water treatments. Cost is an important parameter for comparing the adsorbent materials. Therefore, there is increasing research interest in using alternative low-cost adsorbents. The use of tea waste as the low-cost adsorbents was investigated as a replacement for current costly methods of removing heavy metal ions from aqueous solutions. Experiment results showed that removal of Copper ion by tea waste at optimum condition (60 min. contact time, 0.4g/100mladsorbent dose and 10ppm concentration) is maximum and then for Nickel & Ferrous ion respectively at optimum condition.
Scientific Reports
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 m...