Batch and Column Arsenate Sorption Using Turbinaria ornata Seaweed Derived Biochar: Experimental Studies and Mathematical Modeling

Abstract

The ability of Turbinaria ornata seaweed derived biochar (TOB) to remove arsenate ions from polluted solutions in batch and column trials has been investigated. The biochar, produced at 300 °C and 120 min through pyrolysis, exhibited maximum arsenate sorption capacity at pH 4. Batch sorption isotherm was described with different models (Freundlich, Langmuir and Sips) and the Sips model best described the experimentally derived isotherm with high correlation coefficient and low percentage error values. The maximum arsenate sorptional capacity calculated using the Langmuir model was estimated to be 0.124 mmol/g (at pH 4; 2 g/L biochar dosage and 0.5 mmol/L initial arsenate concentration). For elution trials, 0.01 M NaOH performed well to desorb arsenate from arsenate‐bounded TOB with elution efficiency greater than 99.6% with no significant damage to TOB. The capability of TOB to sorb arsenate continuously was examined in a packed column. The continuous trials were mainly performed to evaluate the impact of influential column parameters including bed height, initial arsenate concentration and flow rate. The arsenate sorptional capacity declined with improvement in flow rate, whereas enhanced with increment in bed depth and initial arsenate concentration values. Regeneration of exhausted TOB was possible with 0.01 M NaOH. After three sorption‐elution cycles it was determined that TOB exhibited superior sorption capacities and percentage removal efficiencies.

[Retracted] Continuous Sorption of Remazol Brilliant Orange 3R Using Caulerpa scalpelliformis Biochar

“…e increased efficiency at reduced initial RBO3R concentration may have occurred because of the availability of abundant binding sites toward very few dye molecules [27,28]. is may result in maximum sorption, whereas at higher concentration, the availability of the dye molecules was very high, and this may result in decreased removal efficiency [29,30]. e overall sorption zone time was increased with a reduction in initial RBO3R concentration.…”

Single and competitive sorption potential of date seed‐derived biochar during removal of lead (II) and cadmium (II) ions

“…The screening of suitable elutant is of prime importance for successful regeneration and reuse of sorbent. The eluting agent should be effective and cheap, environmentally friendly as well as non‐detrimental for the sorbent 38–40 . As depicted in the results of pH edge experimentation (Figure 6), it can be inferred that adsorption is relatively high in mildly acidic conditions.…”

Methylene Blue Adsorption BY UV-Treated Graphene Oxide Nanoparticles (UV/n-GO): Modeling and Optimization Using Response Surface Methodology and Artificial Neural Networks

“…In addition, this may generate up to 200-350 m 3 of e uent per ton of nished products. ese textile e uents contain both organic and inorganic pollutants [3,4]. Not all colors that are applied to clothing are xed to them during the dyeing process, and a large portion of these colors always remain un xed to the fabric and are washed o .…”