Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Bo Lv,Wen Fan,Feishuo Jiao,Yutong Jiao,Baolin Xing
Gasification slag landfill has caused serious environmental pollution in coal chemical sector. Therefore, the utilization of coal gasification slag as a precursor for adsorbent production represents a significant avenue for the sustainable management of this industrial by-product. However, there are few researches on the systematic alkali modification of gasification slag. In this study, an optimized alkali modification process employing a 3 mol/L NaOH solution, a liquid-to-solid ratio of 10:1, conducted at 100 °C for a duration of 10 h, resulted in the production of a high-performance adsorbent, i.e., alkali modified coal gasification slag (CGS-OH). Besides, The formation of an axial crystal structure zeolite crystal on the adsorbent surface. Under optimal adsorption conditions with a pH of 6, an adsorbent dosage of 3 g/L, and a temperature of 25 °C, CGS-OH exhibits the optimal adsorption performance for removal of Pb 2 + , characterized by a high removal rate of 95.77 % and substantial equilibrium adsorption capacity of 47.5 mg/g. Herein, the adsorption kinetics of the above process are well described by the pseudo-second-order kinetic model ( R 2 = 0.9981), indicating that the adsorption process is predominantly governed by a chemical adsorption mechanism, primarily involving electrostatic attraction and ion exchange at the adsorbent's surface. This research underscores the potential of CGS-OH as a cost-effective and high-performance adsorbent for Pb 2+ removal, offering significant implications for industrial wastewater treatment and environmental remediation strategies. It also provides a feasible path for the high-value utilization of industrial by-products in coal chemical sector.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 12
·1512
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IF 3.9
Wenhao Si,Fei Qi,Kangjun Wang,Qiang Wang,Zequan Zeng,Yuting Niu,Zhanggen Huang
With the development of coal chemical technology, a large amount of gasification slag and wastewater are produced through coal gasification. Efficient gasification slag utilization and wastewater treatment have attracted much attention. In this study, gasification slag was modified and used as a low-cost and efficient catalyst to activate persulfate for acetaminophen degradation. Via the analysis of high-resolution X-ray photoelectron spectroscopy, the surfaces of nitric acid and calcined modified gasification slag retained a considerable number of carbonyl and graphite N functional groups. These proved to be effective active sites for the activation of persulfate. X-ray diffraction analysis revealed that the gasification slag was composed of carbon and SiO2. The evaluation of catalytic activity and application of density functional theory proved that the interaction between carbonyl and graphitic nitrogen significantly affected the catalyst activity. When the ratio of graphitic nitrogen to carbonyl was 1:3, the adsorption and activation of persulfate were significantly enhanced. The results of the quenching experiments also confirmed that the non-free radical pathway is the main pathway to activate persulfate using the gasification slag. This study provides a new approach to industrial waste utilization in wastewater treatment.Keywords:persulfate;gasification slag;nonradical oxidation;acetaminophen
研究领域:
环境科学
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化学工程
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废物管理
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Sifei Su,Mudassir Hussain Tahir,Xingxing Cheng,Jiansheng Zhang
Coal gasification technology has led to a significant discharge of solid waste known as coal gasification slag (CGS). However, the high composition of Si and Al in CGS, along with its high carbon content, offers opportunities for potential resource utilization. This review aims to discuss the characterizations, modification methods, and applications of CGS and CGS-based materials for resource utilization. The current study summarizes the compositions, micromorphology , and physicochemical properties of CGS, as well as its modifications and applications in adsorption and other areas. This review shows that modification can change the material's chemical composition and improve its performance. The material has excellent adsorption performance after modification and has the potential to be used in various industries. Although the use of CGS is helpful in addressing the discharge of coal-based solid waste, there is an urgent need for an efficient, practical, and all-encompassing utilization technology. Overall, this review presents a brief vision of CGS's future research and applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
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2025
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IF 5.8
Baoguo Yang,Hongbin Li,Fengcheng Jiang,Mingshi wang,Shengguang Zhang,Kanghui Liu
This study demonstrates a potential pathway for valorizing agricultural and industrial residues by developing a metal-enriched biochar composite (GS/CR-MBC) from corn roots (CR) and gasification slag (GS) via one-step co-pyrolysis. The resulting composite is a mesoporous material. It possesses a specific surface area 22 times greater than that of pristine GS and over 45 times that of CR-derived biochar. The material exhibited a high tetracycline adsorption capacity of 858.7 mg/g and could be regenerated effectively, retaining over 89 % of its initial capacity after five cycles. The adsorption process following the Langmuir isotherm model and pseudo-second-order kinetics. The primary adsorption mechanisms included ligand exchange, coordination complexation, hydrogen bonding, and π–π interactions. These findings highlight the promise of synergistically converting low-value residues into functional materials, supporting the development of a more sustainable and circular bioeconomy.
研究领域:
环境科学
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环境工程
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废弃物资源化
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污染控制化学
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生物炭技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）