Adsorption of cyanide by typical minerals of cyanide slag

doi:10.11949/0438-1157.20190139

Abstract

Abstract:

A large amount of cyanide slag is produced during the cyanidation and gold extraction process and is considered as a hazardous solid waste. Cyanide slag was mainly consisted of pyrite, quartz and silicate. The static adsorption method was applied to simulate the cyanide ion adsorption on several typical minerals and their complex minerals of cyanide tailing in this study. Results showed that the adsorption of CN^- by minerals is linear, but the adsorption capacity is different, and the adsorption amount of CN^- on unit mass could be classified as follows: pyrite > synthetic cyanide tailing>silicate mixture > quartz. Quartz had hardly any adsorption of CN^-. The CN^- adsorption capacity of silicate mixture, pyrite and synthetic cyanide slag were about 1.09, 13.89 and 6.89 mg/g, respectively. A mathematical model was developed to estimate the effects of quartz, silicate and pyrite on the CN^- adsorption capacity of cyanide tailing. The Fourier transform infrared spectroscopy showed that a significant CN^- adsorption peak appeared for silicate, pyrite and cyanide slag, and oxidation products of pyrite changed significantly after the adsorption of CN^-.

Key words: cyanide ion, adsorption, cyanide slag, adsorption capacity, minerals

摘要：

氰化提金过程中产生大量的氰化渣，被视为是危险固体废物。氰化渣主要由黄铁矿、石英和硅酸盐等矿物组成。本实验采取静态吸附法，模拟了氰化渣中几种典型矿物及其复合矿物对氰的吸附。研究表明:矿物对氰的吸附呈线性特征，但吸附能力各不相同, 各矿物对氰的吸附量大小顺序是q_黄铁矿>q_{模拟氰化渣}>q_硅酸盐矿>q_石英；石英对氰几乎不产生吸附，黄铁矿、硅酸盐矿物混合物和模拟氰化渣对氰的饱和吸附量分别约为13.89、1.09和6.89 mg/g。开发了一种数学模型用来评估石英、硅酸盐矿物混合物和黄铁矿含量对氰化渣吸附氰总量的影响。红外分析表明，CN^-吸附在矿物表面，改变了氧化产物，生成了新的物质，促进了矿物对CN^-的吸附。

关键词: 氰离子, 吸附, 氰化渣, 吸附量, 矿物

CLC Number:

TF 09

Yubo TU, Peiwei HAN, Lianqi WEI, Xiaomeng ZHANG, Yingchao DU, Yongliang WANG, Shufeng YE. Adsorption of cyanide by typical minerals of cyanide slag[J]. CIESC Journal, 2019, 70(7): 2684-2690.

涂玉波, 韩培伟, 魏连启, 仉小猛, 杜英超, 王永良, 叶树峰. 氰化渣典型矿物对氰的吸附[J]. 化工学报, 2019, 70(7): 2684-2690.

Figures/Tables 14

Fig.1 X-ray diffraction pattern of cyanide tailing

Table 1 Chemical component of minerals（1）/%(mass)

Mineral	S	Fe	As	SiO₂
pyrite	49.83	45.62	0.02	1.67

Table 2 Chemical component of minerals（2）/%(mass)

Mineral	SiO₂	Al₂O₃	Fe₂O₃	MgO	K₂O	CaO	Na₂O
quartz	97.45	0.92	0.61	0.06	0.02	0.05	0.03
muscovite	43.89	35.42	6.78	2.35	8.07	1.47	0.66
feldspar	66.31	18.02	1.15	0.43	10.84	1.02	2.05
montmorillonite	71.88	13.82	1.08	3.43	0.63	4.57	1.25

Fig.2 Adsorption equilibrium curve

Fig.3 Adsorption curve of minerals on cyanide

Fig.4 Freundlich adsorption isotherm

Fig.5 Langmuir adsorption isotherm

Table 3 Adsorption characteristics of different minerals for CN-

Mineral	Freundlich adsorption equation				Langmuir adsorption equation
Mineral	$q = k F C 1 / n$	k_F	1/n	R²	$q = q m k L C 1 + k L C$	q_m	k_L	R²
pyrite	$q = 0.0218 C 0.8863$	0.0218	0.8863	0.952	$q = 0.01528 C 1 + 0.0011 C$	13.89	0.0011	0.996
silicate mixture	$q = 0.0527 C 0.4702$	0.0527	0.4702	0.851	$q = 0.01538 C 1 + 0.0141 C$	1.09	0.0141	0.999
synthetic cyanide tailing	$q = 0.0507 C 0.605$	0.0507	0.605	0.964	$q = 0.01033 C 1 + 0.0015 C$	6.89	0.0015	0.995

Table 3 Adsorption characteristics of different minerals for CN-

Mineral	Freundlich adsorption equation				Langmuir adsorption equation
Mineral	$q = k F C 1 / n$	k_F	1/n	R²	$q = q m k L C 1 + k L C$	q_m	k_L	R²
pyrite	$q = 0.0218 C 0.8863$	0.0218	0.8863	0.952	$q = 0.01528 C 1 + 0.0011 C$	13.89	0.0011	0.996
silicate mixture	$q = 0.0527 C 0.4702$	0.0527	0.4702	0.851	$q = 0.01538 C 1 + 0.0141 C$	1.09	0.0141	0.999
synthetic cyanide tailing	$q = 0.0507 C 0.605$	0.0507	0.605	0.964	$q = 0.01033 C 1 + 0.0015 C$	6.89	0.0015	0.995

Table 4 CN- adsorption capacity of cyanide tailing with different compositions

No.	Composition/%(mass)			q_m(SC)/(mg/g)
No.	Pyrite	Silicate mixture	Quartz	q_m(SC)/(mg/g)
1	0	0	100	0.02
2	0	100	0	1.09
3	5	40	55	3.67
4	10	30	60	4.40
5	15	25	60	6.12
6	15	20	65	5.80
7	20	30	50	6.39
8	25	25	50	7.49
9	30	20	50	8.46
10	100	0	0	13.89

Table 5 Verification of mathematical model

No.	Composition/%(mass)			q_m(SC)/(mg/g)
No.	Pyrite	Silicate mixture	Quartz	Calculated value	Measured value
11	10	20	70	4.62	4.59
12	30	30	40	7.54	7.92
13	50	10	30	10.78	11.03

Fig.6 Comparison of calculated values with measured values of qm

Fig.7 FT-IR spectra of silicate mixture before and after CN- adsorption

Fig.8 FT-IR spectra of pyrite before and after CN- adsorption

Fig.9 FT-IR spectra of synthetic cyanide tailing before and after CN- adsorption

References 22

1	杨剧文, 王二军.黄金选冶技术进展[J]. 矿产保护与利用, 2007, (4): 34-38.
	YangJ W, WangE J. Progress of mineral processing and metallurgy for gold ores[J]. Conservation and Utilization of Mineral Resources, 2007, (4): 34-38.
2	AdamsM D. Advances in Gold Ore Processing[M]. Amsterdam: Elsevier B.V., 2005: 479-482.
3	HabashiF. One hundred years of cyanidation[J]. Cim. Bulletin., 1987, 80(905): 108-114.
4	TuY B, HanP W, WeiL Q, et al. Removal of cyanide adsorbed on pyrite by H₂O₂ oxidation under alkaline conditions[J]. Journal of Environmental Sciences, 2019, 78: 287-292.
5	陈昌明. 皖南地区大型韧性剪切带及其与金成矿作用关系研究[D]. 武汉: 中国地质大学, 2016.
	ChenC M. Study on the large ductile shear zone in Southern Anhui and its relationship with gold mineralization[D]. Wuhan: China University of Geosciences, 2016.
6	TekoumL. 乍得共和国西南部Mayo Kebbi地区金镍矿床成矿作用研究[D]. 长春: 吉林大学, 2014.
	TekoumL. Study on metallogeny of gold and nickel deposit in Mayo Kebbi, Southwestern Chad[D]. Changchun: Jilin University, 2014.
7	王守敬. 新疆天格尔金矿带含金剪切带型金矿成矿作用研究[D]. 西安: 西北大学, 2008.
	WangS J. The mineralization of gold deposits related to shear zone in Tianger gold deposits belt, Xinjiang[D]. Xi an: Northwest University, 2008.
8	ZhouC D, ChinD T. Copper recovery and cyanide destruction with a plating barrel cathode and a packed- bed anode[J]. Plating and Surface Finishing, 1993, 80(6): 69-77.
9	DutraA J B, RochaG P, PomboF R. Copper recovery and cyanide oxidation by electrowinning from a spent copper-cyanide electroplating electrolyte[J]. Journal of Hazardous Materials, 2008, 152(2): 648-655.
10	Felix-NavarroR M, LinS W, Castro-CecenaA B, et al. Cyanide destruction and simultaneous recovery of copper with an electrochemical reactor[J]. Journal of the Electrochemical Society, 2003.150(8): 149-154.
11	YngardR A, SharmaV K, FilipJ, et al. Ferrate(Ⅵ) oxidation of weak-acid dissociable cyanides[J]. Environmental Science and Technology, 2008, 42(8): 3005-3010.
12	AkcilA, MudderT. Microbial destruction of cyanide wastes in gold mining: process review[J]. Biotechnology Letters, 2003, 25(6): 445-450.
13	WhiteD M, LilonT A, WoolardC. Biological treatment of cyanide containing wastewater[J]. Water Research, 2000, 34(7): 2105-2109.
14	SirianuntapiboonS, ChairattanawanK, RarunroengM. Biological removal of cyanide compounds from electroplating wastewater (EPWW) by sequencing batch reactor (SBR) system[J]. Journal of Hazardous Materials, 2008, 154: 526-534.
15	KogerS, BockhornH, MackieJ C. NO_x formation from ammonia, hydrogen cyanide, pyrrole, and caprolactam under incinerator conditions[C]//Proceedings of the Combustion Institute -Thirtieth International Symposium on Combustion, 2005: 1201-1209.
16	李社红, 郑宝山, 朱建明, 等. 金矿尾矿渣及其污染土壤中氰化物的分布及自然降解[J]. 环境科学, 2001, 22(3): 126-128.
	LiS H, ZhengB S, ZhuJ M, et al. The distribution and natural degradation of cyanide in goldmine waste-solid and polluted soil[J]. Environmental Science, 2001, 22(3): 126-128.
17	王秀芹. 氰化物在不同环境中的自然降解规律研究[J]. 湖北第二师范学院学报, 2014, 31(8): 59-61.
	WangX Q. Study on the natural degradation regularity of cyanide in different environments[J]. Journal of Hubei University of Education, 2014, 31(8): 59-61.
18	SimovicL, SnodgrassW J, MurphyK L, et al. Development of a model to describe the natural degradation of cyanide in gold mill effluents[C]//Cyanide and the Environment Proceedings of a Conference. Tucson Ariz, 1984.
19	CastriK F, MeDevittD A, CastricP A. Influence of aeration on hydrogen cyanide biosynthesis by Pseudomonas aeruginosa[J]. Current Microbiology, 1981, 5(4): 223-226.
20	张朝晖, 刘佰龙, 巨建涛, 等. 氰化提金尾渣矿物特性与热性质研究[J]. 化工生产与技术, 2010, 17(6): 20-24.
	ZhangC H, LiuB L, JuJ T, et al. Mineralogical characteristic and thermal properties on cyaniding extraction tailings of gold[J]. Chemical Production and Technology, 2010, 17(6): 20-24.
21	赵军, 张兴凯, 王云海. 硫铁矿的比表面积、孔体积及其对硫铁矿吸附能力的影响研究[J]. 中国安全生产科学技术, 2008, (4): 119-121.
	ZhaoJ, ZhangX K, WangY H. Influence of specific surface area and pore volume of iron pyrites on adsorption capacity[J]. Journal of Safety Science and Technology, 2008, (4): 119-121.
22	李培铮.黄金生产加工技术大全[M].长沙: 中南工业大学出版社, 1995: 304-307.
	LiP Z. Encyclopedia of Gold Production and Processing Technology [M]. Changsha: Central South University of Technology Press, 1995: 304-307.

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