餐厨垃圾溶剂热法制备负载铁生物质炭

doi:10.19964/j.issn.1006-4990.2022-0058

Abstract

Abstract:

Fe-impregnated spherical biochar was prepared from food waste as raw materials by solvothermal method.The effects of pH，feed mass ratio of C₄H₆O₄Zn·2H₂O and FeCl₃·6H₂O，carbonization temperature and carbonization time on the preparation of biochar were systematically studied.On this basis，the preparation conditions of biochar were optimized by response surface method，and the interaction between different factors was analyzed.When the pH was 2.26，the mass ratio of C₄H₆O₄Zn·2H₂O and FeCl₃·6H₂O was 0.51，the carbonization temperature was 203.96 ℃，and the carbonization time was 2.92 h，the actual carbon yield of biomass carbon was 56.82%.The regression model could reach a significant level，and the fitting was good in the experimental study area.The phase and morphology characterization of biochar proved that Fe₃O₄ was loaded on the surface of spherical biochar，and the specific surface area of biochar could reach 52 m²/g.The biochar loaded with Fe₃O₄ had better adsorption capacity for copper ions than biochar loaded without Fe₃O₄，and the adsorption process could be described by quasi-second-order kinetic equation.

Key words: food waste, biochar, surface modification, solvothermal method, response surface method

CLC Number:

X799.3

LI Yalin, HUANG Yu, Li Dongao, SUI Zhaoyi, HE Haiyang, LIU Haozhao. Preparation of Fe-impregnated biochar from food waste by solvothermal method[J]. Inorganic Chemicals Industry, 2022, 54(11): 96-103.

Figures/Tables 11

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References 22

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水平	因素
水平	A pH	B m（C₄H₆O₄Zn·2H₂O）/ m（FeCl₃·6H₂O）	C 碳化温度/ ℃	D 碳化时间/ h
-1	1	0.4	210	2
0	1	0.4	210	2
1	1	0.4	210	2

pH	m（C₄H₆O₄Zn·2H₂O）/ m（FeCl₃·6H₂O）	碳化温度/℃	碳化时间/h	f/%
pH	m（C₄H₆O₄Zn·2H₂O）/ m（FeCl₃·6H₂O）	碳化温度/℃	碳化时间/h	预测值	实际值
2.26	0.51	203.96	2.92	57.70	56.82
1.00	0.40	190.00	2.00	56.75	49.38
3.00	0.60	210.00	4.00	55.81	53.12

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Preparation of Fe-impregnated biochar from food waste by solvothermal method

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