石灰消化制备高比表面氢氧化钙及其铅吸附性能研究

doi:10.19964/j.issn.1006-4990.2024-0687

Abstract

Abstract:

To investigate the effects of different alkanolamine surfactants on the physicochemical properties and microstructure of Ca（OH）₂，as well as its lead adsorption performance，lamellar high specific surface area Ca（OH）₂ were prepared by a digestion method using quicklime as the raw material，triisopropanolamine（TIPA），Diethyl alcohol monoisopropanolamine（DEIPA），and triethanolamine（TEA） as the modifying agents respectively，for the treatment of lead⁃containing wastewater.The Ca（OH）₂ was characterized using X⁃ray diffraction（XRD），high⁃vacuum gas adsorption analyzer，laser particle size analyzer，and field emission scanning electron microscope（FESEM）.The results showed that the lamellar Ca（OH）₂ obtained by using TEA had optimal properties，with specific surface area，pore volume and average pore size of 53.94 m²/g，0.208 cm³/g and 11.66 nm，respectively.A possible formation mechanism for the high specific surface area Ca（OH）₂ was also proposed.Furthermore，The adsorption process for lead in wastewater was well fitted with Langmuir model（R²=0.992 5） and quasi⁃second⁃order kinetic model（R²=0.999 7），indicating that the adsorption process was mainly a single molecular adsorption process based on chemical adsorption，accompanied by physical adsorption，so that the removal efficiency reached 99.54%，and the residual concentration of lead in water was less than 0.46 mg/L，which was far below the discharge limit.These findings demonstrated the broad application prospects of alkanolamine⁃modified Ca（OH）₂ in the treatment of lead⁃containing wastewater.

Key words: high specific surface area Ca（OH）₂, lime digestion, lead adsorption, alkanolamine modifying agent

CLC Number:

TQ132.32

CHEN Jianjun, LI Li, LIU Laibao, ZHANG Daiyu, JIANG Chenxi, ZHU Hanzhen, WANG Fu, LIAO Qilong. Study on synthesis of high specific surface area calcium hydroxide by quicklime digestion and its adsorption performance for lead[J]. Inorganic Chemicals Industry, 2026, 58(1): 99-107.

Figures/Tables 14

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References 30

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样品	比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	平均孔径/ nm
空白组	11.64	0.077	44.33
TIPA	24.69	0.160	22.88
DEIPA	43.35	0.095	3.60
TEA	53.94	0.208	11.66

样品	粒径/μm
样品	D₁₀	D₅₀	D₉₀
空白组	1.13	3.63	16.80
TIPA	1.51	3.62	7.99
DEIPA	1.08	2.71	6.23
TEA	0.65	1.50	9.49

铅初始质量浓度/ （mg·L^-1）	吸附率/ %	吸附量/ （mg·g^-1）
100	99.54	995.4
200	97.57	1 951.4
300	67.17	2 015.1
400	52.51	2 100.4
500	47.09	2 354.5

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on synthesis of high specific surface area calcium hydroxide by quicklime digestion and its adsorption performance for lead

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