Pengaruh jarak elektroda dan penambahan amonium hidroksida

Sutikno , Purba Risma (2005) Pengaruh jarak elektroda dan penambahan amonium hidroksida. Undergraduate thesis, FMIPA UNDIP.

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Abstract

Zat warna indigo carmine yang digunakan sebagai pewarna jeans dalam industri tekstil menimbulkan limbah cair yang dapat rnencemari lingkungan. Proses elektrokoagulasi dapat dimanfaatkan untuk kepentingan pengolahan limbah pewarna indigo carmine. Pada proses elektrokoagulasi, kompleks besi beiperan dalam mengkopresipitasikan dan membawa serta indigo carmine mengendap. Penambahan konsentrasi amonium hidroksida dan jarak elektroda divariasikan untuk mengetahui pengaruhnya terhadap persen dekolorisasi pewarna indigo carmine. Dekolorisasi pewarna indigo carmine dilakukan dengan elektrolisis menggunakan anoda besi dan katoda karbon, pada potensial 3 volt selama 20 menit. Konsentrasi amonium hidroksida yang ditambahkan divariasikan 0,5 M; 1 M; 1,5 M; 2 M serta jarak elektroda divariasikan 0,5 cm; 1 cm; 1,5 cm; 2 cm dan 2,5 cm. Hasil elektrolisis disaring dan ditentukan absorbansinya menggunakan spektrofotometer UV-Vis. Hasil yang diperoleh menunjukkan bahwa persen dekolorisasi tertinggi sebesar 97,984 % pada penambahan konsentrasi amonium hidroksida 2 M dengan jarak elektroda 1 cm. Persen dekolorisasi terendah sebesar 68,75 % pada penambahan konsentrasi amonium hidroksida 1 M dengan jarak 2,5 cm. Tanpa adanya amonium hidroksida persen dekolorisasi pewarna indigo carmine mencapai 99,872 %. Persen dekolorisasi optimal diperoleh pada jarak elektroda 1 cm dan keberadaan amonium hidroksida menurunkan persen dekolorisasi pewarna indigo carmine. Indigo carmine used as jeans dying at textile industry affected liquid waste that polluted the environment. Electrocoagulation process can be applied to recycle the indigo carmine residues. In the electrocoagulation process iron complex has a role in the coprecipitation and carried the indigo carmine precipitate. The addition of ammonium hidroxide concentration and electrode distance were varied to determine the effect toward decolorization precentage of indigo carmine. Decolorization of indigo carmine carried out by electrolysis using ferrum as anode, carbon as katode with external potential 3 volt for 20 minutes. Ammonium hidroxide concentration added was varied 0.5 M; 1 M; 1.5 M; 2. Electrode distance was varied by 0.5 cm; 1 cm; 1.5 cm; 2 cm dan 2.5 cm. The result of electrolysis was filtered arid this absorbance was identified with UV-Vis spectrofotometer. Thy, result show that 1 M concentration amonium hidroxide addition at 2,5 cm in electrode distance decrease decolorization precentage of indigo carmine until 68,750 %. Maksimurn decolorization percentage of indigo carmine was 97,984 % that is observed at 0,5 M ammonium hidroxide concentration addition in 1 cm electrode distance. Absence of amonium hidroxide decolorization precentage of indigo carmine was 99,722 %. Optimum decolorization precentage of indigo carmine was got at 1 cm electrode distance and presence

Item Type:Thesis (Undergraduate)
Subjects:Q Science > QD Chemistry
Divisions:Faculty of Science and Mathematics > Department of Chemistry
ID Code:30873
Deposited By:Mr UPT Perpus 1
Deposited On:08 Nov 2011 12:38
Last Modified:08 Nov 2011 12:38

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