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Effect of pretreatment on sugarcane bagasse for removal of zinc (ii) ions from aqueous solution

Effect of pretreatment on sugarcane bagasse for removal of zinc (ii) ions from aqueous solution / Wan Mohd Haffizrul W Mohd Apandi
Pada masa kini, perlombongan dan industri penyaduran elektrik adalah sumber paling ketara pencemaran air. Bahan cemar logam berat yang dilepaskan ke persekitaran telah menyebabkan pelbagai kesan terhadap alam sekitar. Dalam kajian ini, penjerapan Zn2+ ke penjerap (hampas tepu yang dirawat KOH, dirawat HCl dan tanpa rawatan) telah dikaji. Semasa penyingkiran Zn2+ teknik berkala digunakan dan kesan larutan pH, jumlah penjerap, kepekatan awal Zn2+ dan masa penjerapan diselidik. Keadaan yang optimum untuk penyingkiran peratusan tertinggi Zn2+ pada 76% dicapai pada pH 5, 1.0 g jumlah penjerap, masa penjerapan 90 minit dan 100 mg/L kepekatan awal Zn2+. Kapasiti maksimum penjerapan adalah 8.80 mg/g selepas 90 minit masa penjerapan dengan kepekatan awal Zn2+ 250 mg/L, 1.0 g dos penjerap dan optimum pH 5.0. Model Langmuir telah didapati sebagai model terbaik untuk data keseimbangan. Penjerapan kinetik telah mengikuti persamaan tindakbalas pseudo-kedua yang menunjukkan proses penyerapan kimia antara hampas tebu dan Zn2+. Pencirian kajian telah dijalankan menggunakan “Fourier Transform Infrared Spectroscopy (FTIR)”. Kumpulan berfungsi utama yang ditemui di hampas tebu adalah rengangan C-O. Hampas tebu yang dirawat KOH sebelum penjerapan mempunyai tinggi kumpulan berfungsi regangan C=O, regangan C=C, lenturan C-H dan regangan O-H berbanding hampas tebu yang tidak dirawat sebelum penjerapan. Disimpulkan bahawa hampas tebu dirawat KOH mempunyai kapasiti penjerapan tertinggi untuk Zn2+ berbanding hampas tebu dirawat HCl dan tidak dirawat. Hampas tebu dirawat KOH adalah penjerap yang murah dan mesra alam untuk penyingkiran Zn2+ di dalam larutan akueus. _______________________________________________________________________________________________________ Nowadays, mining and electroplating industry are the most significant source of water pollution. Heavy metals pollutant which releases into environment, have resulted in various environmental impacts. In this study, adsorption of Zn2+ onto the adsorbent (KOH-treated, HCl-treated, and untreated sugarcane bagasse) was examined. During the removal of Zn2+ process, the batch technique was used and the effect of pH of the solution, the adsorbent dosage, initial concentration of Zn2+ and contact time were investigated. The optimum conditions for the highest percent removal of Zn2+ of 76% were achieved at pH 5, 1.0 g adsorbent dosage, contact time of 90 min and 100 mg/L initial concentration of Zn2+ solution. The maximum adsorption capacity was 8.80 mg/g after 90 minutes contact time with an initial concentration of 250 mg/L, 1.0 g adsorbent dosage and optimum pH of 5.0. Data obtained from batch adsorption experiment fitted well with the Langmuir isotherm model. The adsorption kinetic followed the pseudo-second-order equation which demonstrated a chemisorption process between sugarcane bagasse and Zn2+. The characterisation studies were performed using Fourier Transform Infrared Spectroscopy (FTIR). The major functional groups found in the sugarcane bagasse is CO stretch. KOH-treated sugarcane bagasse before adsorption has higher functional group C=O stretch, C=C stretch, C-H bending and O-H stretch compare to untreated sugarcane bagasse before adsorption. It was concluded that the KOH-treated sugarcane bagasse had higher adsorption capacity for Zn2+ compared with the HCl-treated and untreated sugarcane bagasse. The KOH-treated sugarcane bagasse was an inexpensive and environmentally friendly adsorbent for Zn2+ ions removal from aqueous solutions.
Contributor(s):
Wan Mohd Haffizrul W Mohd Apandi - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008135
Language:
English
Subject Keywords:
mining; electroplating; pollution
First presented to the public:
6/1/2019
Original Publication Date:
6/28/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 67
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-07-01 15:51:37.975
Submitter:
Mohd Jasnizam Mohd Salleh

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Effect of pretreatment on sugarcane bagasse for removal of zinc (ii) ions from aqueous solution1 2019-07-01 15:51:37.975