Competition between phosphorus and arsenic limits the application of phosphate materials in soil remediation. However, it is possible to simultaneously stabilize arsenic and cationic metals by sensible use of phosphate's solubility. In this study, ball-milling and humic acid (HA) activated phosphate rock (PR) were used to stabilize cadmium (Cd) and arsenic (As) in soil. After 30 days of treatment with ball-milling and 5 % humic acid-activated phosphate rock (BMP-HA), the leaching concentrations of Cd and As in the soil decreased from 0.12 mg/L and 0.11 mg/L to 0.0086 mg/L and 0.019 mg/L, respectively. The availability of Cd and As was significantly reduced after BMP-HA treatment. The acid-soluble fraction of Cd decreased from 16.30 % to 1.22 %, indicating its transformation into more stable forms. The water-soluble and surface-adsorbed fraction of As decreased to 0.11 %, while the Ca-associated fraction of As increased from 25.87 % to 31.41 %. Ball-milling increased the specific surface area of PR, enhancing the adsorption and surface complexation of Cd. The addition of humic acid facilitated the dissolution of PR. However, the phosphate release rate in BMP-HA was insufficient to activate As. Meanwhile, the released Ca bound with As, further reducing its availability. Overall, BMP-HA proves to be an effective strategy for remediating cadmium and arsenic-contaminated soils.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jhazmat.2025.137628 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Raman-Polarization-Fluorescence Spectroscopic Lidar for Real-Time Detection of Humic-like Substance Profiles.
Environ Sci Technol
March 2025
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
Humic-like substances (HULIS) widely exist in the atmosphere and may strongly affect human health, environment, and climate. However, there are still no accurate methods for detecting the vertical distribution of HULIS. Here, a Raman-Polarization-Fluorescence Spectroscopic Lidar (RPFSL) was developed to simultaneously measure 64-channel broad fluorescence spectra (370-710 nm) of atmospheric aerosols at an excitation wavelength of 355 nm.
View Article and Find Full Text PDFMechanistic and kinetic understanding of Pb-phosphate biomineralization from humic acid-bound Pb under active growth of phosphate solubilizing Enterobacter aerogenes W6.
J Environ Manage
March 2025
School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China. Electronic address:
Humic acid-bound Pb (HA-Pb), as one of the representative solid-associated Pb species, plays important roles in Pb mobility and toxicity in aqueous environments. Stable Pb-phosphate minerals formation mediated by phosphate solubilizing bacteria (PSB) is a promising approach to immobilizing Pb in contaminated waters. However, the underlying processes and kinetics of Pb-phosphate biomineralization from labile HA-Pb species remain unclear.
View Article and Find Full Text PDFAlternating electric field as an effective inhibitor of bioavailability and phytotoxicity of heavy metals during electric field-assisted aerobic composting.
J Hazard Mater
March 2025
Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China. Electronic address:
Changing the form of the electric field in the electric field-assisted aerobic composting (EAC) system from direct current to alternating current is confirmed as a potential strategy to enhance compost humification to the level of hyperthermophilic composting. This study pioneered the comparative evaluation of the effects of different electric field forms on the immobilization and phytotoxicity of heavy metals during composting. The results demonstrated that the humic acid content and humification index of alternating electric field-assisted aerobic composting (AEFAC) were approximately 22.
View Article and Find Full Text PDF-Oxide Zwitterionic-Based Antifouling Loose Nanofiltration Membranes with Superior Water Permeance and Effective Dye/Salt Separation.
Environ Sci Technol
March 2025
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, P. R. China.
Loose nanofiltration (LNF) membranes with high permeance and separation selectivity are highly desired for the effective separation of organic dyes and inorganic salts. Herein, a novel polyamide LNF membrane was fabricated using zwitterionic amine reactant trimethylamine -oxide-based polyethylenimine (TPEI) and trimesoyl chloride (TMC) via interfacial polymerization (IP). A thin, loose, and smooth polyamide layer was formed due to the low diffusion rate and modified chemical structure of TPEI.
View Article and Find Full Text PDFThe impact of natural organic matter on the aggregation, dissolution and sedimentation of cadmium telluride quantum dots and their interacting mechanism.
Environ Res
March 2025
College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, P.R. China. Electronic address:
This study investigated how natural organic matter (NOM) affected the aggregation, dissolution and sedimentation of cadmium telluride quantum dots (CdTe QDs) in artificial freshwater and seawater, with a focus on the impact of NOM species and the mechanism of CdTe QDs-NOM interactions. Results found that NOM dispersed CdTe QDs aggregates by providing electrosteric stabilization and promoted the dissolution by facilitating their contact in most cases. Among the tested NOM, fulvic acid (FA) was the most effective for releasing Cd in freshwater due to the strongest binding affinity complexing with CdTe QDs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!