Article
Food Science & Technology
Yaxin Zhang, Junmin Ji, Shangde Sun
Summary: Surfactants can enhance the surface activity of activated carbon significantly due to their hydrophilic and hydrophobic groups. By using sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) to modify activated carbon, the removal efficiency of PAH4 from peanut oil was increased from 82.79% to 93.23% for CTAB-AC and by 10.67% for SDS-AC. The retention efficiency of VE and phytosterols also increased significantly. This suggests that surfactant-modified activated carbon shows promise for the removal of PAHs from oil.
Article
Biochemistry & Molecular Biology
Szu-Han Wang, Feng-Cheng Chang
Summary: This study aimed to develop lignosulfonate activated carbon fibers (LACFs) and investigate the metal recovery mechanisms. The LACFs were prepared through electrospinning and CO2-based physical activation. The activated LACF exhibited a larger specific surface area, total pore volume, and micropore ratio, as well as more acidic and sulfur functional groups. The adsorption behaviors of Cu(II) and Au(III) on LACF could be described using the Freundlich and Langmuir model, respectively. Both systems involved physisorption and chemisorption, with mechanisms including electrostatic forces, Van der Walls forces, cation exchange, and surface complexation. Overall, this study provides a foundation for developing physically activated lignosulfonate carbon for metal ion recovery.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Environmental Sciences
Lais S. Alves, Virgilio J. M. Ferreira Neto, Thiago S. B. Costa, Alexandre B. Gaspar, Fabiana M. T. Mendes, Aderval S. Luna, Cristiane A. Henriques
Summary: This study evaluates the performance of activated carbon obtained from sugarcane straw as an adsorbent for polyaromatic hydrocarbons (PAHs) present in model wastewater. The results show that the sugarcane straw activated carbon has a well-developed porosity and high adsorption capacity, and the adsorption follows pseudo-second-order kinetics. The study confirms the potential application of the sugarcane straw activated carbon as a promising adsorbent for PAHs.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ratthakarn Jumroonrat, Thaksina Poyai, Seoktae Kang, Hyojeon Kim, Pharkphum Rakruam, Nattawin Chawaloesphonsiya, Pisut Painmanakul
Summary: This study investigates the recycling of ethyl lactate (EL) contaminated with oil by adsorption using granular activated carbon (GAC). Batch experiments show that oil in EL can be favorably and endothermically adsorbed by GAC, with a maximum adsorptive capacity of 1053 mg g-1 at 35 degrees C. The adsorption process follows the Freundlich isotherm and pseudo-first order kinetic models, and is mainly controlled by film diffusion, hydrophobic interaction, and coalescence. Column adsorption experiments demonstrate that GAC can achieve a maximum breakthrough removal efficiency of 99.3% under specific conditions. The spent GAC can be regenerated with a efficiency of 95% after five adsorption-desorption cycles. The estimated payback period for using EL extraction and recovery is 1.8 years. These findings highlight the industrial applicability of GAC adsorption for solvent recovery and promote EL as a more economically feasible solvent for greener management of oil-contaminated drill cuttings.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yun Ma, Mingzhu Yao, Lu Liu, Chengrong Qin, Baicheng Qin, Ningkang Deng, Chen Liang, Shuangquan Yao
Summary: In this study, the separation of oil components from oily sludge using sodium lignosulfonate treatment was investigated. The optimal conditions for oil removal were determined, and the physicochemical properties of the oily sludge were analyzed. The results showed that sodium lignosulfonate treatment could effectively remove a wider range of petroleum hydrocarbons, providing a new method for the green and efficient separation of oily sludge.
Article
Engineering, Environmental
Monireh S. Hedayati, Otman Abida, Loretta Y. Li
Summary: The authors investigated the adsorption capacities of three surfactant-modified clinoptilolites for the removal of polycyclic aromatic hydrocarbons from aquatic environments and landfill leachate. Results showed efficient removal rates that met freshwater quality standards, indicating the potential for effective PAH removal using these modified materials.
Article
Chemistry, Physical
Nathalie de la Torre-Miranda, Laoise Reilly, Pierre Eloy, Claude Poleunis, Sophie Hermans
Summary: Cyanide salts, despite being toxic, are currently used in gold extraction processes as leaching agents. Thiosulfate, a greener alternative, is limited by the difficulty of recovering gold thiosulfate from the leachate using activated carbon, which is effective for gold-cyanide adsorption. To overcome this, activated carbon has been covalently functionalized with thiol groups (-SH) using cysteamine as a thiol-carrier molecule. The functionalized carbon achieves up to 100% gold recovery in 8-hour contact, and its performance is seemingly unaffected by the pH of the solution.
Article
Materials Science, Multidisciplinary
Nathalie de la Torre-Miranda, Pierre Eloy, Ernesto de la Torre, Timothy Steenhaut, Claude Poleunis, Sophie Hermans
Summary: Thiosulfate is a non-toxic and efficient leaching agent that has the potential to replace cyanide in gold extraction. However, the challenge lies in the recovery of the formed gold thiosulfate complex. In this study, functionalized granular active carbon with covalently grafted primary and quaternary amine sites was proposed as a solution, achieving up to 100% gold recovery in acid and basic conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Environmental Sciences
Ke Wang, Xingzhen Qin, Kungang Chai, Zongwu Wei, Fan Deng, Bingyu Liao, Jinyu Wu, Fang Shen, Zhi Zhang
Summary: A cross-linking strategy combined with chemical activation was used to synthesize starch polyurethane-activated carbon (STPU-AC) for the removal of endocrine-disrupting compounds (EDCs) from water. STPU-AC exhibited a large surface area and abundant functional groups, resulting in high adsorption capacity for bisphenol-A (BPA). The adsorption of BPA by STPU-AC followed a pseudo-second-order kinetic model and a Freundlich isotherm model. Solution chemistry and the presence of other contaminants also affected BPA adsorption. The primary adsorption sites were found to be hydroxyl oxygen and pyrrole nitrogen.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Piotr Ofman, Iwona Skoczko, Maria Wlodarczyk-Makula
Summary: The study demonstrated the ability of aerobic granular activated sludge to remove LMW PAHs from wastewater through biosorption process, with the amount of adsorbed LMW PAHs affecting the condition of the sludge.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Rumi Goswami, Amit Kumar Dey
Summary: The use of surfactant-modified activated carbon has been investigated for the removal of cationic dye from aqueous solution. The experimental results showed that surfactant-modified activated carbon exhibited high adsorption capacity for the dye under optimal conditions, suggesting it can be an effective technique for dye removal.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Jinsong Xia, Harshit Mahandra, Ahmad Ghahreman
Summary: The magnetic activated carbon with good magnetism and specific surface area can efficiently recover gold from cyanide solution, showing faster adsorption rate compared to commercial activated carbon. The magnetic activated carbon is easily separated from the solution with an external magnet and has good reusability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Jing Sun, Xiaowei Li, Yuhong Huang, Guiling Luo, Duanjian Tao, Jiangtao Yu, Linlin Chen, Yanhong Chao, Wenshuai Zhu
Summary: Extraction of lithium from liquid lithium resources using H2TiO3 material as an adsorbent is a popular research field. In this study, the correlation between the hydrophilicity of H2TiO3 and its adsorption performance was further explored. The morphology and hydrophilic functional groups of the surface were regulated using the double surfactants method to prepare nano-sized lithium ion sieve. The synthesized H2TiO3-4 (HTO-4) exhibited excellent hydrophilicity and adsorption performance with a maximum adsorption capacity of 56.03 mg.g(-1) and a low adsorption capacity loss of only 3.8% after five cycles, demonstrating satisfactory cyclic stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Drew M. Glenna, Asmita Jana, Qiang Xu, Yixiao Wang, Yuqing Meng, Yingchao Yang, Manish Neupane, Lucun Wang, Haiyan Zhao, Jin Qian, Seth W. Snyder
Summary: This article introduces an AC-based material and proposes a hierarchical guideline for evaluating the feasibility of such materials in carbon capture. The most critical performance indicator is the CO2 adsorption energy, with considerations for thermal stability and defect sensitivity, as well as selectivity and capacity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Energy & Fuels
Himanshu Kesarwani, Amit Saxena, Ajay Mandal, Shivanjali Sharma
Summary: The present study investigated the effects of a binary surfactant mixture on various aspects of surfactant polymer flooding, including the critical micelle concentration, adsorption behavior, interfacial properties, and wetting characteristics. By comparing initial and final concentrations of the surfactant mixture, it was found that the binary surfactant mixture outperforms individual surfactants and efficiently reduces surfactant adsorption by 63%. Additionally, the binary surfactant mixture achieved an ultralow interfacial tension value of 0.0097 mN/m and was able to recover up to 76% of the total oil in sand pack flooding experiments.
Article
Multidisciplinary Sciences
Weiwei Zhao, Chaoyan Zhang, Zengguang Yan, Youya Zhou, Jianrong Li, Yabo Xie, Liping Bai, Lin Jiang, Fasheng Li
Editorial Material
Engineering, Environmental
Jie Ma, Lin Jiang, Matthew A. Lahvis
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Engineering, Environmental
Ruihuan Zhang, Lin Jiang, Maosheng Zhong, Dan Han, Rui Zheng, Quankai Fu, Youya Zhou, Jie Ma
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Environmental Sciences
Ruihuan Zhang, Lin Jiang, Maosheng Zhong, George DeVaull, Matthew A. Lahvis, Jie Ma, Youya Zhou, Rui Zheng, Quankai Fu
ENVIRONMENTAL POLLUTION
(2019)
Article
Engineering, Environmental
Ping Zhang, David O'Connor, Yinan Wang, Lin Jiang, Tianxiang Xia, Liuwei Wang, Daniel C. W. Tsang, Yong Sik Ok, Deyi Hou
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Engineering, Environmental
Ruihuan Zhang, Dan Han, Lin Jiang, Maosheng Zhong, Jing Liang, TianXiang Xia, Ying Zhao
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Environmental Sciences
Dan Han, Lin Jiang, Maosheng Zhong, Ruihuan Zhang, Quankai Fu, Dan Zhang, Tianxiang Xia
ENVIRONMENTAL EARTH SCIENCES
(2020)
Review
Engineering, Environmental
Jie Ma, Thomas McHugh, Lila Beckley, Matthew Lahvis, George DeVaull, Lin Jiang
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Environmental Sciences
Ruihuan Zhang, Lin Jiang, Dengdeng Jiang, Shijie Wang, Dan Zhang, Maosheng Zhong, Tianxiang Xia, Quankai Fu
Article
Engineering, Environmental
Lin Jiang, Ruihuan Zhang, Lina Zhang, Rui Zheng, Maosheng Zhong
Summary: A new risk assessment strategy for mercury-contaminated sites was proposed using bioaccessible fractions and soil Hg vapor concentrations. Experimental results showed a significant decrease in Hg risk for oral ingestion and inhalation pathways when using this strategy.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yang Wang, Shijie Wang, Lin Jiang, Lin Ma, Xiaoyan Li, Maosheng Zhong, Wenyu Zhang
Summary: This study used Monte Carlo simulations to analyze the effects of soil properties on the derivation of unified national soil screening levels (NSSLs). The results showed that NSSLs were insufficient in identifying contaminated sites in the south, central, and northwest regions, while they were too conservative in screening out sites that required no further action in the east and northeast regions. The findings of this study could contribute to more scientific and effective soil quality management in other large countries.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Lin Ma, Yifei Liu, Qing Yang, Lin Jiang, Guanghe Li
Summary: Pharmaceutical and personal care products (PPCPs) are commonly found emerging contaminants in groundwater, posing risks to drinking water safety and human health. This study investigated the occurrence and distribution of nine PPCPs in riverbank groundwater and adjacent rivers, finding variations in concentrations and major compounds depending on sampling locations and water systems. The spatial distribution of PPCPs in riverbank groundwater was influenced by hydraulic connection and aquifer lithology. Significant correlations were found between PPCP concentrations and physicochemical factors in groundwater. Overall, this study provides important evidence on the role of lithology and hydrological conditions in the composition, distribution, and influential factors of PPCPs in riverbank groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ruihuan Zhang, Maosheng Zhong, Lin Jiang, Quankai Fu, Shijie Wang, Wenyu Zhang, Xiaoyan Li, Lin Ma
Summary: This paper proposes a multiphase partitioning equilibrium (MPE) model for predicting the distribution and vapor exposure risk assessment of volatile organic compounds (VOCs) in contaminated soil in arid areas. The study shows that soil moisture is a key factor controlling VOC partitioning, with vapor-solid interface adsorption dominating under low moisture conditions and adsorption into soil organic matter becoming the controlling factor as humidity increases.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Xiaoyan Li, Yang Wang, Min Yang, Lin Jiang, Maosheng Zhong, Lin Ma, Shijie Wang, Wenyu Zhang, Yuyang Gong, Dongming Li
Summary: Although many industrial heritage sites have been repurposed into attractive landscapes, the contamination and health risks from polycyclic aromatic hydrocarbons (PAHs) on industrial legacy surfaces remain unexplored. Through the collection of surface samples from buildings and facilities at Beijing coking plant, it was found that these surfaces were contaminated with carcinogenic PAHs, suggesting the need for regulation and remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Jun Man, Maosheng Zhong, Qing Zhou, Lin Jiang, Yijun Yao
Summary: Traditional phase equilibrium models often over-or underestimate soil vapor concentrations for assessing VOC-contaminated sites. In this study, machine learning models were developed using soil-soil vapor data pairs collected from contaminated sites in northern China. The random forest (RF) model provides more accurate predictions of soil vapor concentrations compared to the classic dual equilibrium desorption model. Significant explanatory covariates affecting soil vapor concentrations include soil concentration and organic carbon-water partition coefficient. The findings contribute to more accurate risk assessments at VOC-contaminated sites.
