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Phạm Tăng Cát Lượng, Lưu Gia Hy, Trương Chí Hiền, Nguyễn Kim Diễm Mai(1)

Nghiên cứu khả năng xử lí ion Pb(ii) và Cu(ii) trong dung dịch bằng than sinh học điều chế từ mùn cưa

A study on the removal of ions pb(ii) and cu(ii) from solution by using biochar derived from sawdust

Tạp chí Khoa học - Đại học Sư phạm TP Hồ Chí Minh

2021

12

2162-2177

1859-3100

Bài báo này khảo sát các yếu tố tác động đến quá trình hấp phụ ion Pb(II) và Cu(II) trên vật liệu than sinh học điều chế từ mùn cưa. Các yếu tố khảo sát bao gồm: giá trị pH (2,0-6,0), nồng độ ion kim loại (5-200 mg‧L-1), thời gian hấp phụ (5-1440 phút), khối lượng than sinh học (0,05-0,10g). Kết quả cho thấy dung lượng hấp phụ cực đại đạt 62,11 mg‧g-1 đối với Pb(II) và 20,49 mg‧g-1 đối với Cu(II) ở pH = 4,0 và thời gian đạt cân bằng hấp phụ là 120 phút. Quá trình hấp phụ ion Pb(II) và Cu(II) trên than sinh học phù hợp hơn với quy luật động học bậc hai và mô hình đẳng nhiệt hấp phụ Langmuir. Nghiên cứu này cũng công bố kết quả xử lí ion Pb(II) và Cu(II) trong nước thải ở Phòng Thí nghiệm Hóa Vô cơ, Trường Đại học Sư phạm Thành phố Hồ Chí Minh.

This study aims to investigate four factors affecting the adsorption process of Pb(II) and Cu(II) ions on biochar prepared from sawdust. These factors include: pH (2.0-6.0), metal ion concentration (5-200 mg.L-1), adsorption time (5-1440 minutes), and biochar weight (0.05-0.10 g). The results show that the maximum amount of metal ion adsorbed per adsorbent mass unit reached 62.11 mg.g-1 for Pb(II) and 20.49 mg.g-1 for Cu(II) at pH = 4.0 and adsorption time of 120 minutes. The adsorption of Pb(II) and Cu(II) ions on biochar is well represented by the second-order kinetics and Langmuir adsorption isotherm model. This study presents the ability to remove Pb(II) and Cu(II) ions in wastewater of the Inorganic Chemistry laboratory at Ho Chi Minh City University of Education

TTKHCNQG, CTv 138

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