(Anacardium occidentale L.)

Properties and Quality of the Activated Charcoal Made from Cashewnut Shell

(Anacardium occidentale L.)

Abstract

 Currently, cashew nut (Anacardium occidentale L.) shell is abundantly available as waste from chasew nut processing industries. Theoretically, cashew nut shell is potentially used for activated charcoal. This paper studies the properties and quality of activated charcoal made from cashew nut shell. The study also evaluates processing condition in producing optimum quality of activated charcoal. Initially, cashew nut shells were collected and carbonized in 500°C for 3 hours. Then, the charcoal was activated in temperatures of 800°C, 900°C and 1000°C for 30, 60 and 90 minutes. The data were then analyzed using analysis of variance and Tukey test for further significance test. Results show that chasew nut shell could potentially be used for commercial activated charcoal. The optimum quality of shell’s activated charcoal was obtained by activating the charcoal in 1000°C for 90 minutes, that produced charcoal with properties of 0.40% moisture content, 8.85% volatile content, 77.40% fixed carbon content and 131.35 mg/g of methylene blue adsorptive capacity. Almost all charcoal’s properties met the quality requirement stated in the Indonesian National Standar (SNI 06-3730-1995) except those of  three properties: ash content (13.75%), benzene adsorptive capacity (2.93%) and adsorptive capacity of iodium (703.73 mg/g).

 

Keywords: Cashenut shell, activated charcoal, properties and quality, Indonesian National Standard

 

Abstrak

 

Saat ini, tempurung biji jambu mete (Anacardium occidentale L.) banyak tersedia sebagai limbah dari industri pengolahan jambu mete. Secara teori, tempurung jambu mete berpotensi dikembangkan untuk arang aktif. Tulisan ini mempelajari sifat dan mutu arang aktif dari tempurung biji jambu mete, dan  mengevaluasi  kondisi  pembuatan  arang  aktif  untuk  menghasilkan  mutu  arang  aktif  yang optimum. Pada awalnya, tempurung biji jambu mete dikumpulkan dan diarangkan pada suhu 500°C selama 3 jam. Kemudian arang tempurung biji jambu mete diaktivasi pada suhu 800°C, 900°C, dan 1000°C selama 30, 60, dan 90 menit. Data kemudian dianalisa menggunakan analisis sidik ragam dan uji Tukey untuk uji perbedaan lanjutan. Hasil penelitian menunjukkan tempurung jambu mete berpotensi  untuk  dibuat  arang  aktif  komersial.  Kualitas  optimum  arang  aktif  dari  tempurung jambu mete dapat dihasilkan dari proses aktivasi pada suhu 1000°C selama 90 menit, yang dapat memproduksi arang aktif  dengan kadar air 0,40%, kadar zat terbang 8,85%, kadar karbon terikat 77,40%, dan kapasitas daya jerap terhadap metilen biru 131,35 mg/g. Hampir semua sifat arang aktif memenuhi persyaratan mutu daya jerap terhadap metilen biru yang telah ditetapkan dalam Standar Nasional Indonesia (SNI 06-3730-1995) kecuali tiga sifat arang, yaitu kadar abu (13,75%), daya jerap terhadap benzena (2,93%), dan daya jerap terhadap iodium (703,73 mg/g).

 

Kata kunci: Tempurung jambu mete, arang aktif, sifat dan mutu, Standar Nasional Indonesia

 

Media Publikasi :

Jurnal Penelitian Hasil Hutan Vol.35 No.2, Juni 2017

Penulis :

Dewi Alimah

Written by :