@article{ao2012,
  title={Langmuir, Freundlich, Temkin and Dubinin–Radushkevich Isotherms Studies of Equilibrium Sorption of Zn 2+ Unto Phosphoric Acid Modified Rice Husk},
  author={Dada A.O},
  year={2012},
  journal={IOSR Journal of Applied Chemistry},
  doi={10.9790/5736-0313845},
  url={https://doi.org/10.9790/5736-0313845}
}