MỘT SỐ YẾU TỐ ẢNH HƯỞNG ĐẾN KHẢ NĂNG HẤP PHỤ NH4+ CỦA THAN SINH HỌC LỤC BÌNH (Eichhornia crassipes)

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2020

Mô tả vật lý: tr.113-119

Bộ sưu tập: Báo, Tạp chí

ID: 314341

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Mục tiêu của nghiên cứu này là đánh giá các yếu tố ảnh hưởng đến khả năng hấp phụ amoni của than sinh học lục bình như: pH dung dịch, lượng than hấp phụ, thời gian tiếp xúc và nồng độ NH4+ ban đầu. Than sinh học lục bình được chế tạo bằng phương pháp nhiệt phân (700 oC) bằng lò nung VMF 165, tốc độ khí nitơ được bơm vào lò là 3 L/phút để loại bỏ không khí trong lò. Sau đó, nhiệt độ lò được nâng lên từ nhiệt độ phòng đến 700 °C với tốc độ gia nhiệt 10 °C/phút. Các nghiệm thức được bố trí ngẫu nhiên và 3 lần lặp lại cho mỗi nghiệm thức. Kết quả nghiên cứu cho thấy pHpzc của than sinh học lục bình là 10,1. pH tối ưu hấp phụ là 7
lượng than tối ưu là 1 gam/50mL dung dịch NH4+
thời gian tối ưu 120 phút và nồng độ NH4+ ban đầu là 80 mg L-1.The aim of this study is to evaluate the influence factors for the ammonium adsorption capacity on water hyacinth biochar such as solution pH, adsorbent dosage, reaction time and initial NH4+ concentration. Water hyacinth biochar was produced by pyrolysis method (700 oC) by a kiln - VMF 165 with the nitrogen gas was pumped into the furnace at a rate of 3 L/min to remove air from the inside of the furnace. The oven temperature was then increased from room temperature to 700 °C at a heating rate of 10 °C/min. The treatments were randomly assigned and 3 replicates for each treatments. Research results were showed that pHpzc of water hyacinth biochar was 10.1. Optimal adsorption pH value was 7
the optimal adsorbent dosage was 1g/50mL
the optimal reaction time was 120 minutes and the initial concentration of NH4+ was 80 mg L-1.

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