Equilibrium and kinetic studies of sorption of 2.4-dichlorophenol onto 2 mixtures: bamboo biochar plus calcium sulphate (BC) and hydroxyapatite plus bamboo biochar plus calcium sulphate (HBC), in a fluidized bed circulation column

Abstract

Sorption studies were carried out to investigate removal of 2.4-dichlorophenol (2.4-DCP) from aqueous solution in a fl uidized bed by two types of adsorbent mixtures: BC (Bamboo char plus Calcium sulphate), and HBC (Hydroxyapatite plus Bamboo char plus Calcium sulphate); both manufactured in ball shape. The main material bamboo char was characterized by FTIR, DTA and SEM. The adsorption experiments were conducted in a fl uidized bed circulation column. Adsorption, isotherms and kinetic studies were established under 180 min operating process time, at different initial 2.4-DCP solution concentrations ranging from 5-10 mg/L, and at different fl ow rates ranging from 0.25-0.75 L/min. The data obtained fi tted well for both the Langmuir and Freundlich isotherm models; indicating favorable condition of monolayer adsorption. The kinetics of both adsorbents complies with the pseudo second-order kinetic model. BC was proven a new effective composite and low cost adsorbent which can be applied in the fi eld of wastewater treatment, and it can also play an important role in industry water treatment.

Engineered biochar from wood apple shell waste for high-efficient removal of toxic phenolic compounds in wastewater

“…Clearly, when pH is higher than 6, the adsorption equilibrium decreases. A similar phenomenon has been previously reported for the sorption of phenol and chlorophenols on different agrowaste-based biochar materials such as pine fruit shell biochar (PFS) 32 , pinus massoniana biochar 75 , food waste-based biochar (FWC) 42 , H. fusiformis biochar (HFB) 76 , FA-coated biochars 77 , magnetic biochar 46 , bamboo biochar 78 , and paper sludge/wheat husk biochar 79 . Thus, the optimum solution pH of 6 was chosen for other adsorption experimental studies.…”

“…By the PSO, the (q e,cal ) values exhibit a good fit with the (q t,exp ) values owing to the low Chi-square (χ 2 ) and Δq t (%) values, which were in the range of 0.11-4.88 and 1.48-6.60% for the PSO kinetic model. Therefore, the results of this study show that the PSO model produces a superior fit for phenol and CPhs adsorption onto WAS-BC, which have similar trends; in addition, it is demonstrated that the kinetics of phenol, 4-CPh, and 2,4-DCPh sorption onto other sorbents also followed the PSO kinetic model [19][20][21]78 .…”

Optimization and Mechanism of Cadmium Removal Using Biochar Obtained from Wetland Emergent Plant Zizania caduciflora

“…The main extract species of inorganic substances from the Z. caduciflora series are Ca, K, and Mg because the primary biomass is growing in freshwater. The K concentration is 3.5–830 times higher than that of Ca and Mg in different biochar water lotions, which is a universal phenomenon in many researches (Alamin and Kaewsichan 2015). Among the three substances, there is an upward concentration trend on the whole, with the time gradually increasing to 1440 min.…”

A Review on Bamboo as an Adsorbent for Removal of Pollutants for Wastewater Treatment

“…A study by Alamin and Kaewsichan [70] has been carried out using two types of adsorbent mixtures, biochar calcium sulfate (BC) and biochar calcium sulfate hydroxyapatite (BCH), through pyrolysis. e study was conducted for the purpose of removing 2,4-dichlorophenol (DCP) from aqueous solutions.…”