?url_ver=Z39.88-2004&rft_id=10.3303%2FCET1972030&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Rafeek%2C+M.R.&rft.aulast=Rafeek&rft.aufirst=M.R.&rft.date=2019&rft.title=Chemical+Engineering+Transactions&rft.pages=175-180&rft.atitle=Adsorption+and+Desorption+of+Nickel+(II)+Ion+by+Oil+Palm+Empty+Fruit+Bunch+grafted+Polyvinyl+Alcohol+Hydrogel&rft.volume=72&rft.issn=22839216&rft.genre=article