Efficacy of Adsorption of Cu (II), Pb (II) and Cd (II) Ions onto Acid Activated Watermelon Peels Biomass from Water

Abstract

Abstract:The efficacy of the watermelon peel biomass was tested for the removal of lead, copper and cadmium metal ions using batch experiments. Watermelon peel was first modified by exposing it to1N sulphuric acid. The effect of the treatment on morphological characteristics of the adsorbent was evaluated by mid infrared spectroscopy (MIR) and Scanning Electron Microscopy (SEM).

Trends in Adsorption Mechanisms of Fruit Peel Adsorbents to Remove Wastewater Pollutants (Cu (II), Cd (II) and Pb (II))

“…Wanja et al [105] similarly obtained 99% of Pb (II) removal using watermelon peel activated carbon as an adsorbent. The pH pzc of the treated sample must be determined to investigate the modification on the surface charge of the sample, .…”

“…At pH > pH pzc, the surface charge is negative, and it may be possible to interact with positive species in solution. For instance, the value of pH pzc of fruit peel wastes such as alkaline modified apricot shell, acidic modified lobeira fruit shell, activated carbon of lemon peel, modified pomegranate peel, mango peel, and the modified grape peel is 5.7, 4, 3.2, 2.35, 4.5, 2.4 and 6.7 respectively [30,95,105,111,114,115]. These values are crucial in the selection of the pH for the adsorption process.…”

THE FEASIBILITY OF SAGO BARK (Metroxylon sagu) IN Cu(II) REMOVAL: BATCH AND FIXED BED COLUMN EVALUATION

“…Thus, the metal ions could not interact with the active site properly. 3,13,26 The previous study found that the pH pzc of sago bark was 5. 20,21 Therefore above this pH, the sago bark surface possesses positively charged 27 .…”

“…4,5 The adsorption technique is preferred because it is easy operation, high efficiency, low-cost and regeneration ability. 6 The low-cost comes from the utilization of biomass or agricultural waste as adsorbent to remove heavy metals such as barley straw ash 7 , stem tree of soybean 8 , nypa fruticans merr shell 9 , activated carbon from oak leaves 10 and date palm dead leaflets, 11 curry tree carbon, 12 watermelon peel, 13 rice husk, 14 tree sawdust, natural and activated fluorapatite, 15 zeolite, 16 eggshell and sugarcane bagasse. 17 These adsorbents consist of lignocellulosic which has pores, carboxylic and hydroxyl functional group playing a role in metal ion removal.…”