ABSTRAK Penelitian mengenai uji daya serap zat warna metilen biru menggunakan karbon aktif yang telah dimodifikasi dengan cangkang telur telah dilakukan. Sumber karbon aktif yang digunakan adalah limbah cangkang biji buah melinjo (Gnetum gnemon). Karbon aktif yang diperoleh selanjutnya dimodifikasi dengan larutan kalsium dari cangkang telur menggunakan metode impregnasi.Uji daya serap karbon aktif terhadap zat warna metilen biru berdasarkan parameter waktu kontak, pH dan konsentrasi. Hasil uji adsorpsi menunjukkan bahwa kondisi optimum serapan yang dicapai karbon aktif yaitu pada saat 25 menit dan pada pH 10. Jenis adsorpsi pada penelitian ini adalah mengikuti isoterm adsorpsi Langmuir dengan serapan maksimum sebesar 90,9 mg/g. Berdasarkan hasil penelitian ini,dapat disimpulkan bahwa karbon aktif yang dimodifikasi menggunakan cangkang telur berpotensi digunakan sebagai adsorben zat warna metilen biru. Kata kunci : karbon aktif, cangkang melinjo, cangkang telur, metilen biru, adsorpsi, FT-IR ABSTRACT Research about absorption test of methylene blue pigment using carbon active which has been modified with egg shells has been done. Carbon active source which has been using was shell seed of melinjo (Gnetumgnemon). Carbon active that has been obtained was modified as the next step with calcium solution from egg shell by using impregnation method. Absorption test of carbon active towards methylene blue pigment based on contact time, pH, and concentration parameter. Absorption test showed that optimum condition of absorption that has achieve by carbon active was at 25 minutes and in pH 10. Kind of absorption in this research followed Langmuir absorption isotherm with maximum absorbency of 90,9 mg/g. Based on this research, could be concluded that carbon active which has been modified by using egg shell was potentially used as adsorbent methylene blue pigment. Keywords : carbon active, melinjo shell, egg shell, methylene blue, adsorption, FT-IR