Article
Chemistry, Multidisciplinary
Zhanxi Wei, Yidan Zhu, Yuanyuan Wang, Zefeng Song, Yuanzhao Wu, Wenli Ma, Yongxia Hou, Wenqing Zhang, Yuesuo Yang
Summary: Natural colloids are widely distributed in soil and groundwater, and their presence has a significant impact on the adsorption and transport of contaminants, such as Ni2+. Factors like pH, ion strength, and humic acid influence the adsorption and transport of Ni2+ by soil colloids in saturated porous media. The presence of soil colloids affects the initial penetration rate of Ni2+, but does not increase its final transport efficiency in the effluent. Additionally, humic acid decreases the transport efficiency of Ni2+ in the presence of soil colloids.
APPLIED SCIENCES-BASEL
(2022)
Article
Biophysics
Yan Li, Luuk K. Koopal, Yanjun Chai, Wenfeng Tan, Chunyan Wu, Xu Tang, Yi Chen
Summary: Urease in soil interacts with humic acid, resulting in changes in its enzymatic activity and stability. This study investigated the structural changes of urease in the presence of humic acid and the microenvironments of specific residues using spectroscopic techniques. The results showed that humic acid inhibited the fluorescence intensity of urease, but had little effect on the microenvironments of the specific residues. The interaction between urease and humic acid was found to be pH-dependent. The findings provide a better understanding of the behavior of negatively charged proteins in natural environments.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Environmental Sciences
Ming Chen, Dengjun Wang, Xiaoyun Xu, Yue Zhang, Xiangyang Gui, Bingqing Song, Nan Xu
Summary: Biochar nanoparticles can mediate the transport of cadmium in soils, but the efficiency is affected by factors such as pyrolysis temperature, ionic strength, and organic matter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Huali Yu, Guangfei Liu, Lingyu Shen, Ruofei Jin, Jiti Zhou, Haiyan Guo, Lianfeng Wang
Summary: As two important components of dissolved organic matter (DOM), dissolved black carbon (DBC) and humic acid (HA) possess different chemical and structural properties, which might influence their activities like metal complexation and mediating electron transfer. A series of coprecipitates of iron oxides (FeOx) and DOM (HA or DBC) with different C/Fe molar ratios were prepared and showed excellent catalytic efficiencies for Fenton-like degradation of norfloxacin (NOR). DBC-FeOx exhibited the highest catalytic activity among all the samples.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Applied
Diana Carolina Gonzalez-Gonzalez, Maria Elena Lugo-Sanchez, Celia Olivia Garcia-Sifuentes, Juan Carlos Ramirez-Suarez, Ramon Pacheco-Aguilar
Summary: The study evaluated the effects of pH and ionic strength on the extraction capacity of myofibrillar proteins from Jumbo squid mantle muscle, as well as the impact of adding IA on its gel-forming ability. Results showed that ionic strength had a greater influence on protein extraction, while IA reduced the gel-forming ability by oxidizing sulfhydryl groups in the proteins.
Article
Chemistry, Physical
Laure Degrand, Rebeca Garcia, Kevin Crouvisier Urion, Wafa Guiga
Summary: This study proposes the use of DLS to characterize aqueous solutions containing LA. The parameters affecting CMC, particle size, and distribution are investigated. The CMC value is found to be 0.13 ± 0.01 mM in a 0.2 M borate buffer, with particle size increasing with LA concentration. pH and counter ion concentration also influence the stability and size of the particles.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Agniva Dutta, Gleb Vasilyev, Eyal Zussman
Summary: This study presents the fabrication of a polymer-protein hydrogel composed of polymethacrylamide (PMAAm) and bovine serum albumin (BSA). BSA acts as a cross-linker of polymer chains due to its specific interactions between corresponding functional groups. The hydrogel with optimized composition and preparation conditions demonstrated excellent mechanical properties, including fatigue resistance and the ability to restore damaged structures.
Article
Environmental Sciences
H. Lee, F. Coulon, S. T. Wagland
Summary: The aim of this study was to investigate the effect of different concentrations of humic acid on metal(loid) recovery rate in landfill leachate. The study found that humic acid was effective in releasing several metals, while its concentration had an impact on the release of certain metals. The immobilization of other metals was due to the coordination and adsorption of humic acid. The findings provide insights for the development of efficient and environmentally-friendly methods of metal(loid) recovery using humic acid as a leaching agent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jun Wang, Yuling Liu, Wen Luo, Xingxing Wang, Rui Liao, Shichao Yu, Maoxin Hong, Chunxiao Zhao, Baojun Yang, Yang Liu, Xueduan Liu, Guanzhou Qiu
Summary: Humic acid is a widely available and environmentally friendly substance that can be a good choice for inhibiting chalcopyrite biooxidation and alleviating copper pollution. This study proposed and validated a novel method for inhibiting chalcopyrite biooxidation using humic acid. The results showed that humic acid effectively inhibited chalcopyrite biooxidation and reduced the release of copper ions. Moreover, humic acid inhibited bacterial growth, promoted the formation of mineral phases, and intensified the passivation of chalcopyrite, effectively hindering the biooxidation of chalcopyrite.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Alan Puckowski, Weronika Cwiek, Katarzyna Mioduszewska, Piotr Stepnowski, Anna Bialk-Bielinska
Summary: The study found that microplastics have a complex nature of sorption on pharmaceuticals, including both hydrophobic and electrostatic interactions. The ionic strength of the medium was identified as a significant factor influencing the sorption potential in common conditions of the natural environment.
Article
Agricultural Engineering
Longzao Luo, Miao Li, Shuang Luo, Mukesh Kumar Awasthi, Xiaoai Lin, Xing Liao, Changsheng Peng, Binghua Yan
Summary: The electric field-microalgae system (EFMS) can effectively improve the removal efficiency of humic acids (HAs) from piggery digestate. Results showed that EFMS had a higher HAs removal efficiency compared to single electric field and microalgal technology, with oxidation, coagulation, and assimilation being the main mechanisms for HAs removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Shunan Dong, Wangwei Cai, Jihong Xia, Liting Sheng, Weimu Wang, Hui Liu
Summary: The aggregation kinetics of fragmental polyethylene glycol terephthalate (PET) nanoplastics in aqueous environment were studied under various chemistry conditions. It was found that the aggregation of PET nanoplastics increased with higher electrolyte concentrations and lower solution pH, especially in the presence of divalent cations. Additionally, the presence of humic acid was shown to significantly inhibit the aggregation of PET nanoplastics.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Jing Wang, Jie Zhang, Jing Liu, Nannan Hou, Qi Li, Guannan Zhou, Kewan Li, Yang Mu
Summary: The effects of solid copper corrosion products on the generation of iodinated trihalomethanes during chloramination were found to be dependent on the concentrations of the corrosion products and humic acid, but were almost unaffected by the initial iodine and bromide concentrations.
Article
Green & Sustainable Science & Technology
Yuchao Shao, Menggang Bao, Weizhong Huo, Rong Ye, Yanqing Liu, Wenjing Lu
Summary: Humic substance is crucial for soil fertility and has various applications. pH conditions play a significant role in the production of artificial humic acids (AHAs) from biomass waste. The combination of acid and alkaline hydrothermal processes enhances humification and leads to a significant improvement in dissolution and transformation. The highest yield of AHAs obtained from corn stalk has great potential for industrial applications.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Shu-Ju Chao, C. P. Huang, Chi-Cuong Lam, Lap-Cuong Hua, Shih-Hsien Chang, Chihpin Huang
Summary: The study revealed that copper oxide nanoparticles in low-ionic strength solutions quickly form relatively small aggregates with high copper dissolution, posing a significant threat to aquatic organisms.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)