Effects of poultry manure on soil biochemical properties in phthalic acid esters contaminated soil

Abstract

This study aimed to evaluate the effects of poultry manure (PM) on soil biological properties in DBP- and DEHP-contaminated soils. An indoor incubation experiment was conducted. Soil microbial biomass C (Cmic), soil enzymatic activities, and microbial phospholipid fatty acid (PLFA) concentrations were measured during incubation period. The results indicated that except alkaline phosphatase activity, DBP and DEHP had negative effects on Cmic, dehydrogenase, urease, protease activities, and contents of total PLFA. However, 5 % PM treatment alleviated the negative effects of PAEs on the above biochemical parameters. In DBP-contaminated soil, 5 % PM amendment even resulted in dehydroenase activity and Cmic content increasing by 17.8 and 11.8 % on the day 15 of incubation, respectively. During the incubation periods, the total PLFA contents decreased maximumly by 17.2 and 11.6 % in DBP- and DEHP-contaminated soils without PM amendments, respectively. Compared with those in uncontaminated soil, the total PLFA contents increased slightly and the value of bacPLFA/fugalPLFA increased significantly in PAE-contaminated soils with 5 % PM amendment. Nevertheless, in both contaminated soils, the effects of 5 % PM amendment on the biochemical parameters were not observed with 10 % PM amendment. In 10 % PM-amended soils, DBP and DEHP had little effect on Cmic, soil enzymatic activities, and microbial community composition. At the end of incubation, the effects of PAEs on these parameters disappeared, irrespective of PM amendment. The application of PM ameliorated the negative effect of PAEs on soil biological environment. However, further work is needed to study the effect of PM on soil microbial gene expression in order to explain the change mechanisms of soil biological properties.

High‐performance liquid chromatography separation of phthalate acid esters with a MIL‐53(Al)‐packed column

“…Phthalate acid esters (PAEs) are a group of nonhalogenated synthetic compounds that are widely applied in building materials, fragrances, plasticizers, and many other customer‐oriented materials . Higher‐molecular‐weight PAEs, such as bis(2‐ethylhexyl) phthalate (DEHP), are widely used as plasticizers in the industry to improve flexibility , while the low‐molecular‐weight phthalates, like dimethyl phthalate (DMP), diethyl phthalate (DEP), di‐ n ‐butyl phthalate (DBP), and butyl benzyl phthalate (BBP) are usually applied to keep the durability of the color or scent in consumable products . Due to the wide use of PAEs, they extensively exist in the environment through migration or evaporation.…”

Arbuscular mycorrhizal fungi by inducing watermelon roots secretion phthalates, altering soil enzyme activity and bacterial community composition to alleviate the watermelon wilt

“…Previous indications suggested that dibutyl phthalate could increase soil CAT activity while decreasing soil urease activity [ 47 – 51 ]. PAEs have also been reported to inhibit soil dehydrogenase and urease activities [ 49 , 51 , 52 ]. In the present study, both exogenous diisooctyl phthalate and dibutyl phthalate could increase the activities of urease, sucrase, and catalase in the rhizosphere of watermelon in continuous cropping systems.…”