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The objective of this study was to test whether biochar amendment could offset the effects of nitrogen (N) deposition on soil microbial biomass carbon (MBC) and enzyme activity. We applied N (low and high rates) and biochar (low and high rates) individually, and in combination (all permutations) to the soil of a Torreya grandis cv. “Merrillii” orchard as a 13-month field experiment during 2015-2016...
In this study, a combination of indoor culture and high-throughput sequencing was used to analyze changes in nutrients and fungal communities in black soil after the addition of biomass charcoal. The following conclusions were drawn: 1) After six months of constant temperature, black soils containing biomass carbon changed in physicochemical properties. For example, soil pH, organic matter, water...
As a waste of the fish processing industry, scales cause the disposal of large amounts of solid waste into the environment. How to turn such waste into a useful product is an important issue. In this study, acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) were extracted from silver carp (Hypophthalmichthys molitrix) scales using a new acid-enzyme combined method. The results showed that...
We studied the anti-cold shock performance of activated sludge microbes (ASM) with magnetic field (MF) strengthening under slow and rapid cooling and rewarming. From stage S3 to S4, the TTC-DHA (triphenyltetrazolium chloride dehydrogenase) of reactor A₂ and B₂ were 98.5% and 72.5% higher than that of reactor A₁ and B₁, which showed that MF had a better strengthening effect on TTC-DHA under slow temperature...
The effects of in-situ immobilization of heavy metals by applying natural and chitosan-introduced zeolite, bentonite, and activated carbon (AC) were systematically studied to remediate cadmium (Cd)-contaminated soils in a pot experiment using Brassica juncea as the indicator plant. The results show that zeolite, bentonite, and its chitosan composites can increase soil pH and reduce the biological...
This study comprehensively investigated the concentrations, distribution patterns, sources, and health risks of 16 polycyclic aromatic hydrocarbons (PAHs) found in soils around two thermal power plants in Shandong, China. The total concentrations of the 16 total PAHs (Σ₁₆PAH) in the Longguang (LG) and Xinyuan (XY) thermal power plants were 1,031.78-2,744.06 and 1,383.8-2,924.8 μg/kg, respectively,...
Three kinds of soil with different levels of polycyclic aromatic hydrocarbon (PAH) contamination were collected, and diesel was added to soil to prepare two kinds of diesel-contaminated soil. The radish was planted in five kinds of soil through a pot experiment, and the concentration and composition of PAHs in radish were analyzed using high-performance liquid chromatography with an ultraviolet and...
The study investigates the impact of subsurface pipes at different depths on physicochemical properties of soda meadow alkaline soil. Field experiments were carried out in 5 treatments: CK (no treatment), CK1 (treatment with comprehensive supplementary measures: subsoiling to 0.6 m and applying farm manure in the amount of 34 m³/hm², then mulching with sandy soil of 500 m³/hm²), and 3 treatments of...
Although the treatment for recycling chrome in tanning effluents is relatively mature, the post-tanning processes have no corresponding effective technology due to the lack of knowledge about the effluents. In this work we investigated the composition and properties of rewetting and neutralizing effluents in posttanning processes. Goat skins were tanned with sulfate chrome liquor of alkalinity 33%...
Soil microbial communities play a vital role in soil carbon and carbon sequestration in forest ecosystems. In this study, soils were sampled in Tianbaoyan National Nature Reserve in southeastern China from four Nothotsuga longibracteata forests, including a pure N. longibracteata forest (NF), N. longibracteata + hardwood mixed forest (NHF), N. longibracteata + Rhododendron simiarum mixed forest (NRF),...
Wastewater recycling technologies have been widely used in tanneries to reduce environmental impacts. However, only a few recycling methods have been developed for vegetable tanning processes due to limited knowledge of their wastewaters. In this study, the structures of the polyphenols in the larch tanning wastewater (LTW) and commercial larch tannin (CLT) were characterized with spectrographic and...
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