Title : An investigation on adsorption of heavy metal with hydrochar developed from industrial waste: Kinetics, mechanisms, and desorption
Abstract:
As a result of the rapid development of the industry, heavy metal pollution of water environments is a very serious problem. Removal of heavy metal ions and derivatives from the environment has become a priority in order to preserve the quality of the ecosystem. Adsorption is an effective method that can be used to reduce the levels of heavy metals in wastewater. The motive of this work is to synthesis hydrochar from industrial processing waste (pomegranate bagasse (PB)) by a hydrothermal carbonization (HTC) process and the prepared hydrochar (PBHC) is been used as an effective functionalized sorbent for the removal of heavy metal ion (copper (Cu (II))) from simulated contaminated water in a batch mode. The adsorption kinetics was investigated at different initial concentrations (50 and 100 ppm) and times (3-300 min). Two different kinetic models were used to analyze the experimental copper adsorption kinetic data. Among the tested various models, the pseudo-second-order kinetic model provided the best simulation to the kinetic data of hydrochar with R2 of being 0.98. The results show surface complexation of -OH and -COOH groups with Cu(II) ions played an important role on the adsorption mechanism of Cu(II) on the above-mentioned sorbent. Desorption of Cu(II) from Cu(II) loaded sorbent was investigated with 0.1 M HCl at 298 K for 2 h. Overall, the results demonstrated that industrial processing waste are promising feedstock to be made into hydrochar for treatment of wastewater contaminated by Cu (II) and heavy metal.
Audience Takeaway:
- Utilization of pomegranate bagasse (PB) via HTC was explored.
- Prepared hydrochar (PBHC) was examined as Cu(II) sorbent.
- The adsorption kinetics performance of the hydrochar for Cu(II) was investigated.
- Surface complexation is played a major role in Cu(II) binding using PBHC.
- Pomegranate bagasse hydrochar (PBHC) could be considered as a promising sorbent to remove heavy metals from the aqueous medium.
