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Muhamad MS, Johar MR, Sunar NM, Ali R, Hamidon N, Abdul Hamid NH, Harun H. Response Surface Methodology For Optimization Of Sodium Sulphate And Sodium Lauryl Sulphate Removal Using Hydroxyapatite Adsorbent. peat [Internet]. 2020 Dec. 13 [cited 2022 Jun. 28];1(1):127-33. Available from: https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/74