A comprehensive adsorption study of 1-Hydroxy-2-Naphthoic acid using cost effective engineered materials

Abstract

The naphthoic acids are challenging and costly to remove from water and soil. 1-Hydroxy-2-Naphthoic acid (HNA) is a phenanthrene decomposition product from petroleum-contaminated environments during the aerobic decomposition of polyaromatic hydrocarbons. The hydrogeological mobility of hydrocarbon breakdown products represent a pollution risk (e.g. for drinking water sources). Adsorption to biochar produced from agricultural by-products is a useful strategy to remediate contaminated wastewaters. Here, we examine the controls on the HNA adsorption to the adsorbents magnetite, clay minerals, biochar and magnetite enriched companion materials, namely the influence of contact time, contaminant concentration and ionization effects at different pH. The adsorption of HNA was investigated using low-cost and readily available adsorbents: i) wheat straw biochar, ii) rice husk biochar, iii) sugarcane biochar, iv) zeolite, v) montmorillonite, vi) magnetite and their enriched magnetic companions. Magnetite

2.2-Diphenic Acid: A Reliable Biomarker Of Phenanthrene Biodegradation

“…Cis-3,4-dihydrophenanthrene-3,4-diol is consequently transformed to 3,4-dihydroxyphenanthrene. The latter undergo series of reaction including ring cleavage to produce 1-hydroxy-2-naphthoic acid, which terminates the upper catabolic pathway of phenanthrene (Zeb et al, 2020). The hydroxynaphthoic acid takes two routes: phthalic acid and naphthalene routes.…”