this work describes a route for recovering nickel, cobalt, iron, zinc and lanthanides from spent nickel-metal hydride batteries. Formic acid was used as leachant. Experiments were run at 25-50°C 1-4 h. Under the best conditions leaching yields surpassed 99 wt.%, except iron. The insoluble matter contains almost solely iron iron(III) basic formate. leachate went through six separation procedures...

Nghiên cứu này nhằm khảo sát ảnh hưởng của nồng độ CaCl2 trong nước ngâm trước khi sấy, nhiệt sấy và thời gian đến chất lượng bột ổi lạnh dựa trên các chỉ tiêu về ẩm, màu sắc, hàm vitamin C cảm quan sản phẩm bằng máy bơm nhiệt. Ổi nguyên liệu được cắt lát khoảng 0,15 cm, xử lý với 2, 3, 4 5% (đối chứng 0%) để hạn chế sự mất giảm nhớt quá trình sau đó đưa đi nghiền mịn tạo ổi. Kết quả cho thấy 4...

Permintaan perak dunia mencapai 32.627 ton pada tahun 2021. Untuk memenuhi permintaan selain menambang dari alam, juga bisa didapatkan melalui pungut ulang limbah elektronik menggunakan Deep Eutectic Solvent (DES) yang ramah lingkungan. Penelitian ini bertujuan untuk melakukan logam baterai koin oksida metode pelindian dengan DES oksalin. Metode penelitian terdiri tahapan sintesis pelarut eutek...

Multistage heat pump drying of macadamia nut under modified atmosphere was studied to improve the drying process and quality of the nuts. Conditions of study included drying temperature of 40-60°C, using nitrogen and normal air as drying medium. Drying kinetics and quality of nuts (moisture content, aw, rancidity and colour) as well as energy consumption of all drying processes were examined. T...

Objectives: The aim of this study is to produce biodiesel from crude Mesua ferrea oil and determine the influence different operating characteristics, especially catalyst content, methanol molar ratio reaction temperature on evaluation yield. Likewise, assess physicochemical properties for diesel engine applications. Methods: Prior production, was degummed, bleached deodorized remove free fatty...

Collagen-supplemented milk products are susceptible to damage due high-temperature processing Pulsed Electric Field (PEF) pasteurization is carried out with a pretreatment temperature of <65oC maintain quality. This study aims determine the total microbe, level microbial decline and intensity sensory profile supplemented collagen by in PEF process. used completely randomized design factorial...