Adsorption and Migration Characteristics of Fluorine in Ash-Sluicing Water in Soils

Abstract

The excessive fluorine content in ash-sluicing water has become one of the main environmental pollution problems in the thermal power generation industry. This study selected 5 representative soil types and used fluoride ions (F-) as the pollution control factor. The experimental results showed that the isotherms of the F- solutions prepared by deionized water (adsorbed by Jianbi clay and Fengrun sandy soil) and ash-sluicing water all conformed to the Langmuir isothermal adsorption equation. In terms of the F- solution prepared with ash-sluicing water, the adsorption isotherm of Tianshengqiao red clay conformed to the Langmuir isothermal adsorption equation; the adsorption isotherms of Beijing silty soil and Fen River loess conformed to the Henry isothermal adsorption equation. In terms of the maximum adsorption capacity, Tianshengqiao red clay > Jianbi clay > Beijing silty soil ? Fen River loess > Fengrun sandy soil. Through the experiments, we also found that the adsorption capacity decreased with increasing pH, and the pH buffering effects of the 5 soils, from high to low, were Tianshengqiao red clay > Jianbi clay > Beijing silty soil > Fen River loess > Fengrun sandy soil.

Zinc Oxide/Phosphorus-Doped Carbon Nitride Composite as Potential Scaffold for Electrochemical Detection of Nitrofurantoin

“…The chief water contaminants are households, organic materials, drug manufacturers, large-scale animal feeding operations, organic materials, industries, and pharmaceutical residues [ 4 , 5 , 6 ]. Notably, the World Health Organization revealed that nearly 30% of individuals living rurally need hygienic water sources, and more than 2,000,000 humans die every year from contamination of drinkable water [ 7 , 8 , 9 ]. Among the different pollutants, the most notorious are pharmaceutical residues, which harm biodiversity.…”

Novel Hydrophobic Polyvinyl-Alcohol Formaldehyde Sponges: Synthesis, Characterization, Fast and Effective Organic Solvent Uptake from Contaminated Soil Samples

“…solidifiers, absorbents, dispersants, booms, and skimmers have been employed for the adsorption of organic solvents from water/soil bodies [ 8 , 9 , 10 , 11 ]. With the exception of absorbents, all of these methods have some drawbacks, including low recovery rate, secondary contamination, higher time consumption, and non-biodegradable in nature [ 12 , 13 , 14 , 15 ]. These days, the main focus is on absorbent substances, as they effectively trap organic solvents from the polluted spill site [ 16 , 17 ].…”