Abstract
Applicability of coconut husk char in heavy metal removal was examined in the study. The surface morphology and elemental compositions of the char was investigated with SEM-EDX machine. Heavy metals sorption on 100 g of the char dosage was studied under five different contact times in the column experiment. Isotherm and kinetic models were the probing tools for biosorption mechanism prediction. Results indicated removal efficiency for chromium, cobalt, cadmium, aluminum and arsenic at 60 mins contact time were 72, 80, 86, 89 and 100 % respectively. Contaminate removal depends on metal involved and sorption contact time. Adsorption data are fitted well into Freundlich isotherm model (R2 > 0.92). Pseudo kinetic second order well described the adsorption process, with most R2 values ≥ 0.94. Coconut husk char is an effective biosorbent in sequestration of arsenic, cadmium, aluminum and cobalt in contaminated surface water.
Highlights
Technological advancement pivotal to development has enhanced the utilization of several materials in the production line
Surface water contaminants sorption by 100 g of coconut husk char was considered in this study
The study shows that coconut husk char is an effective biosorbent in arsenic, cadmium and cobalt sorption from mildly polluted surface water in column experiment
Summary
Technological advancement pivotal to development has enhanced the utilization of several materials in the production line. The deterioration eventually exceeds the shelf life with the last resort for the product being disposal. The latter is feasible if other waste management options such as reuse and recover are not feasible. Metal is one of the widely utilized materials. The use spans from tiny and simple tool to gigantic and sophisticated equipment and structures. This could be attributed to the superior durability and strength when compared with other materials like plastic and rubber, though on the high side in terms of cost [2]. The additional notable challenge in the utilization of metal-enriched materials is the significant contribution to environmental contamination due to the pronounced susceptibility to wear, rust and corrosion [3]
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