两种磁性生物炭耦合<i>Diaphorobacter</i> sp. DFA4去除2，4-DFA和Cu<sup>2+</sup>的特性

doi:10.19965/j.cnki.iwt.2023-0811

摘要/Abstract

摘要：

以橘子皮为原料，氯化铁、镍锰铁氧体为磁性介质，制备了氯化铁和镍锰铁氧体改性生物炭（分别记为FBC和MBC），重点考察FBC和MBC介导 Diaphorobacter sp. DFA4耦合体系去除2，4-二氟苯胺（2，4-DFA）和Cu²⁺的特性。结果表明：在0.5~2.0 g/L FBC/MBC的介导作用下，Diaphorobacter sp. DFA4对2，4-DFA和Cu²⁺的去除效果明显提升。当2，4-DFA初始质量浓度为100~900 mg/L时，相比纯菌Diaphorobacter sp. DFA4培养体系，FBC和MBC介导耦合体系对2，4-DFA的降解强化倍数分别为2.24~4.04倍和1.96~4.71倍，Cu²⁺去除率则分别由59.70%~69.95%提升至88.57%~93.20%和82.12%~88.20%。当pH为6.0~8.0时，较纯菌Diaphorobacter sp. DFA4培养体系，MBC、FBC介导耦合体系对2，4-DFA的去除率分别提高了15.35%~36.32%和22.43%~37.42%，对Cu²⁺的去除率则分别提高了37.63%~42.34%和43.61%~47.83%；当盐度由0提高至4%时，两个耦合体系对2，4-DFA的去除率基本保持在85%及以上，而纯菌Diaphorobacter sp. DFA4培养体系对2，4-DFA的去除率则由77.98%降至55.19%。机理分析发现，耦合体系可诱导分泌更多的腐殖酸，且在偏碱条件下，FBC更有利于促使腐殖酸的分泌。

关键词: Cu²⁺, 2，4-二氟苯胺, 磁性生物炭, Diaphorobacter sp.DFA4

Abstract:
Ferric chloride and nickel-manganese ferrite magnetic mesoporous biochars(designated as FBC and MBC, respectively) were synthesized by utilizing orange peels as the biomass feedstock and ferric chloride and nickel-manganese ferrite as magnetic media simultaneously. Subsequently, the characteristics of the FBC- and MBC-mediated coupling system with Diaphorobacter sp. DFA4 for the simultaneous removal of 2, 4-difluoroanine and Cu²⁺ in the aqueous phase were investigated. The results demonstrated that FBC and MBC at concentrations ranging from 0.5 g/L to 2.0 g/L significantly enhanced the ability of Diaphorobacter sp. DFA4 to remove 2, 4-DFA and Cu²⁺. In the presence of FBC and MBC, the degradation efficiency of 2, 4-DFA increased by 2.24-4.04 times or 1.96-4.71 times, respectively, compared to the pure Diaphoractor sp. DFA4 culture system, when the initial concentration of 2, 4-DFA was 100 mg/L to 900 mg/L. The removal efficiency of Cu²⁺ also increased from 59.70%-69.95% to 88.57%-93.20% and 82.12%-88.20%, respectively. Moreover, at pH levels ranging from 6.0 to 8.0, compared to the pure Diaphoractor sp. DFA4 culture system, the removal efficiency of 2, 4-DFA in the MBC- and FBC-mediated coupling systems increased by 15.35%-36.32% and 22.43%-37.42%, respectively. The removal rates of Cu²⁺ also increased by 37.63%-42.34% and 43.61%-47.83%, respectively. When the salinity increased from 0 to 4%, both coupling systems maintained removal rates of 2, 4-DFA above 85%, while the pure Diaphorobacter sp. DFA4 culture system exhibited a decrease from 77.98% to 55.19%. Mechanistic analysis revealed that the coupling systems induced the secretion of more humic acid, and under alkaline conditions, FBC was more conducive to promoting the secretion of humic acid from Diaphorobacter sp. DFA4.

Key words: Cu²⁺, 2,4-difluoroaniline, magnetic biochar, Diaphorobacter sp. DFA4

中图分类号:

X703.1

引用本文

高隆基, 赵芝清, 马源, 岳静, 廖文杰, 黄明慧. 两种磁性生物炭耦合Diaphorobacter sp. DFA4去除2，4-DFA和Cu²⁺的特性[J]. 工业水处理, 2024, 44(8): 90-98.

Longji GAO, Zhiqing ZHAO, Yuan MA, Jing YUE, Wenjie LIAO, Minghui HUANG. Removal of 2,4-difluoroanilne and Cu²⁺ by Diaphorobacter sp. DFA4 assistedmagnetic biochar[J]. Industrial Water Treatment, 2024, 44(8): 90-98.

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链接本文: https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-0811

https://www.iwt.cn/CN/Y2024/V44/I8/90

图/表 7

图1 两种磁性生物炭制备流程

Fig.1 The preparation processes of two magnetic biochars

图1 两种磁性生物炭制备流程

Fig.1 The preparation processes of two magnetic biochars

图2 磁性生物炭的表征

Fig.2 Characterization of magnetic biochar

图2 磁性生物炭的表征

Fig.2 Characterization of magnetic biochar

图3 磁性生物炭投加量对2，4-DFA和Cu²⁺去除效果的影响

Fig.3 Effects of magnetic biochars dosage on removal of 2，4-DFA and Cu²⁺

图3 磁性生物炭投加量对2，4-DFA和Cu²⁺去除效果的影响

Fig.3 Effects of magnetic biochars dosage on removal of 2，4-DFA and Cu²⁺

图4 2，4-DFA初始浓度对2，4-DFA和Cu²⁺去除的影响

Fig.4 Effects of 2，4-DFA initial concentrations on removal of 2，4-DFA and Cu²⁺

图4 2，4-DFA初始浓度对2，4-DFA和Cu²⁺去除的影响

Fig.4 Effects of 2，4-DFA initial concentrations on removal of 2，4-DFA and Cu²⁺

图5 pH对2，4-DFA和Cu²⁺去除效果的影响

Fig.5 Effects of pH on removal of 2，4-DFA and Cu²⁺

图5 pH对2，4-DFA和Cu²⁺去除效果的影响

Fig.5 Effects of pH on removal of 2，4-DFA and Cu²⁺

图6 盐度对2，4-DFA和Cu²⁺去除效果的影响

Fig.6 Effects of salinity on removal of 2，4-DFA and Cu²⁺

图6 盐度对2，4-DFA和Cu²⁺去除效果的影响

Fig.6 Effects of salinity on removal of 2，4-DFA and Cu²⁺

表1 不同环境因子条件下各生化体系中腐殖酸质量浓度 (mg/L)

Table 1 Humic acid contents in various biochemical systems under different environmental conditions

影响因子 DFA4体系
MBC+DFA4

体系

FBC+DFA4

体系

磁性生物炭

投加量
0 22.79±2.945^a — —

0.5 g/L — 55.86±3.109^b 50.58±3.590^b

1.0 g/L 98.55±9.986^c 76.37±3.359^b

1.5 g/L 116.99±5.407^d 81.98±3.041^b

2.0 g/L 123.93±10.439^d 88.39±3.590^bc

pH 6.0 14.36±1.391^ab 31.92±10.833^abc 18.43±14.906^abc

6.5 11.42±3.805^ab 17.73±7.030^abc 24.62±3.198^abc

7.0 7.195±5.884^ab 29.96±18.24^abc 20.26±1.626^abc

7.5 10.57±2.417^ab 35.43±17.562^abc 44.57±11.409^bc

8.0 4.38±1.106^a 31.36±19.107^abc 52.44±12.623^c

盐度 0 10.34±3.939^a 53.06±3.822^ab 83.18±23.087^b

1% 8.01±0.915^a 48.65±16.829^ab 79.84±7.537^b

2% 10.99±2.378^a 34.80±20.143^ab 89.46±19.640^b

3% 13.19±5.872^a 47.23±12.954^ab 79.31±31.602^b

4% 19.14±4.222^a 44.64±2.079^ab 88.13±34.994^b

表1 不同环境因子条件下各生化体系中腐殖酸质量浓度 (mg/L)

Table 1 Humic acid contents in various biochemical systems under different environmental conditions

影响因子 DFA4体系
MBC+DFA4

体系

FBC+DFA4

体系

磁性生物炭

投加量
0 22.79±2.945^a — —

0.5 g/L — 55.86±3.109^b 50.58±3.590^b

1.0 g/L 98.55±9.986^c 76.37±3.359^b

1.5 g/L 116.99±5.407^d 81.98±3.041^b

2.0 g/L 123.93±10.439^d 88.39±3.590^bc

pH 6.0 14.36±1.391^ab 31.92±10.833^abc 18.43±14.906^abc

6.5 11.42±3.805^ab 17.73±7.030^abc 24.62±3.198^abc

7.0 7.195±5.884^ab 29.96±18.24^abc 20.26±1.626^abc

7.5 10.57±2.417^ab 35.43±17.562^abc 44.57±11.409^bc

8.0 4.38±1.106^a 31.36±19.107^abc 52.44±12.623^c

盐度 0 10.34±3.939^a 53.06±3.822^ab 83.18±23.087^b

1% 8.01±0.915^a 48.65±16.829^ab 79.84±7.537^b

2% 10.99±2.378^a 34.80±20.143^ab 89.46±19.640^b

3% 13.19±5.872^a 47.23±12.954^ab 79.31±31.602^b

4% 19.14±4.222^a 44.64±2.079^ab 88.13±34.994^b

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两种磁性生物炭耦合Diaphorobacter sp. DFA4去除2，4-DFA和Cu²⁺的特性

Removal of 2,4-difluoroanilne and Cu²⁺ by Diaphorobacter sp. DFA4 assistedmagnetic biochar

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影响因子		DFA4体系	MBC+DFA4 体系	FBC+DFA4 体系
磁性生物炭投加量	0	22.79±2.945^a	—	—
	0.5 g/L	—	55.86±3.109^b	50.58±3.590^b
	1.0 g/L		98.55±9.986^c	76.37±3.359^b
	1.5 g/L		116.99±5.407^d	81.98±3.041^b
	2.0 g/L		123.93±10.439^d	88.39±3.590^bc
pH	6.0	14.36±1.391^ab	31.92±10.833^abc	18.43±14.906^abc
	6.5	11.42±3.805^ab	17.73±7.030^abc	24.62±3.198^abc
	7.0	7.195±5.884^ab	29.96±18.24^abc	20.26±1.626^abc
	7.5	10.57±2.417^ab	35.43±17.562^abc	44.57±11.409^bc
	8.0	4.38±1.106^a	31.36±19.107^abc	52.44±12.623^c
盐度	0	10.34±3.939^a	53.06±3.822^ab	83.18±23.087^b
	1%	8.01±0.915^a	48.65±16.829^ab	79.84±7.537^b
	2%	10.99±2.378^a	34.80±20.143^ab	89.46±19.640^b
	3%	13.19±5.872^a	47.23±12.954^ab	79.31±31.602^b
	4%	19.14±4.222^a	44.64±2.079^ab	88.13±34.994^b

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两种磁性生物炭耦合Diaphorobacter sp. DFA4去除2，4-DFA和Cu2+的特性

Removal of 2,4-difluoroanilne and Cu2+ by Diaphorobacter sp. DFA4 assistedmagnetic biochar

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两种磁性生物炭耦合Diaphorobacter sp. DFA4去除2，4-DFA和Cu²⁺的特性

Removal of 2,4-difluoroanilne and Cu²⁺ by Diaphorobacter sp. DFA4 assistedmagnetic biochar