Reactive dyes adsorption via Citrus hystrix peel powder and Zea mays cob powder: characterization, isotherm and kinetic studies

Abstract

Adsorption is one of the generally used treatment methods due to the low-cost, high removal effect and simple design The aim of the study was to investigate the adsorption efficiency of lignocellulosic waste such as lime peel (Citrus hystrix) and CC (Zea mays) for removal of Reactive Violet 5 (RV5) and Reactive Red 2 (RR2) dyes. The physical and chemical characteristics of the adsorbents were analyses by using Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Additionally, the solution acidity, adsorbent mass, duration of adsorption, and dye concentration were evaluated with isotherm and kinetic study to determine the mechanism of adsorption. The removal of RV5 for lime peel and CC achieved to 50 % and 48 % while the removal of RR2 for lime peel and CC reached 53 % and 46 %. The highest adsorption capacity for both adsorbents was 4.29 mg/g and 6.14 mg/g. In terms of physical characteristics, the adsorbent had large surface area that adsorbs more dyes in same amount of dye concentration. The results showed that Freundlich isotherm and Pseudo-first-order kinetic models were best fitted to the adsorption process with R2 value of 0.9974 and R2 value of 0.9919.

Domestication of Asian Redtail Catfish (Hemibagrus sp.) as an Effort to Preserve Local Fish at the Loka Ngrajek in Magelang, Central Java

“…Faktor kondisi atau indek ponderal dan sering disebut faktor K merupakan hal yang penting dari pertumbuhan ikan (Effendie, 2002). Penelitian terkait panjang berat dan faktor kondisi berbagai spesies ikan telah banyak dilakukan sebelumnya terhadap ikan kembung (Marasabessy, 2020), Teripang Hitam (Holothuria arta) di Karimun Jawa Jepara (Panuluh et al, 2019), ikan Tuna Sirip Kuning (Thunnus albacares) di Pelabuhan Samudera Cilacap, Provinsi Jawa Tengah (Azizi et al, 2020), menggunakan sampel ikan Belanak (Mugilidae) (Ramses et al, 2020), pada ikan Kapas-kapas (Gerres filamentosus) (Lau et al, 2020), dan Efendiansyah (2018) meneliti Ikan Keparas (Cyclocheilichtyhys apogon) di Bangka, Machrizal et al (2019) pada ikan Terubuk, dan penelitian ikan Laut Aceh oleh Abubakar et al (2019). Saat ini, baung sedang pada program domestikasi dimana informasi mengenai lokasi yang sesuai untuk pemeliharaan ikan baung belum banyak dipelajari (Subagja et al, 2018).…”

Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels

“…Chitosan is one of the most applied polysaccharides in hydrogel synthesis due to its antimicrobial activity, biodegradability and biocompatibility for living beings [12]. Additionally, the interaction of many solutes, such as drugs and dyes, with chitosan has been widely studied over the years [13][14][15][16]. Chitosan is produced from the chitin deacetylation, which is commonly extracted from, e.g., crustacean exoskeletons and silkworm chrysalides [17].…”