VvCCD7, a novel strigolactone synthesis gene in grapevine (Vitis vinifera L.), increases sensitivity to drought and low-phosphorus stress in transgenic Arabidopsis.

As a new plant hormone, strigolactone not only promotes leaf senescence, inhibits plant branching and regulates root structure, but also plays an important role in abiotic stress resistance. However, little is known about the function of VvCCD7 under abiotic stress, a key gene for the synthesis of strigolactone in grapevine. In this study, VvCCD7 gene was cloned from grape leaves of 'Cabernet Sauvignon'.

In-depth exploration of toxicity mechanism of nanoscale zero-valent iron and its aging products toward Escherichia coli under aerobic and anaerobic conditions.

The bacteria toxicity of nanoscale zero-valent iron (nZVI) can be changed during its application in water treatment but the toxicity mechanism is still not well understood, particularly under anaerobic conditions. Here, the toxicity of nZVI and its aging products towards Escherichia coli (E. coli) and the mechanisms of extracellular and intracellular reactive oxygen species (ROS) damage were deeply probed in the presence and absence of oxygen in ultrapure water.

Graphene shell-encapsulated copper-based nanoparticles (G@Cu-NPs) effectively activate peracetic acid for elimination of sulfamethazine in water under neutral condition.

In this study, a graphene shell-encapsulated copper-based nanoparticles (G@Cu-NPs) was prepared and employed for peracetic acid (PAA) activation. The characterization of G@Cu-NPs confirmed that the as-prepared material was composed of Cu and CuO inside and encapsulated by a graphene shell. Experimental results suggested that the synthesized G@Cu-NPs could activate PAA to generate free radicals for efficiently removing sulfamethazine (SMT) under neutral condition.

A comparative study on the physicochemical properties, reactivity and long-term performance of sulfidized nanoscale zerovalent iron synthesized with different kinds of sulfur precursors and procedures in simulated groundwater.

There are plentiful ways to synthesize sulfidized nanoscale zerovalent iron (S-nZVI), and this study investigated the influence of sulfur reagents (NaS, NaSO, NaSO) and sulfidation sequence (co-sulfidation and post-sulfidation method) on the physicochemical properties, reactivity, and long-term performance of S-nZVI in simulated groundwater. The results suggested that the co-sulfidized nZVI (S-nZVI) has higher reactivity (∼2-fold) than S-nZVI due to the stronger electron transfer capacity, deriving from the higher content of Fe and reductive sulfur species. However, during aging, the reactivity of S-nZVI would be lost more rapidly than S-nZVI, due to the faster corrosion of Fe and more oxidation of reductive sulfur species.

Adsorption and catalytic degradation of organic contaminants by biochar: Overlooked role of biochar's particle size.

Biochar (BC) is considered as a promising adsorbent and/or catalyst for the removal of organic contaminants. However, the relationship between the particle size of BC and its adsorption/catalysis performance is largely unclear. We therefore investigated the influence of particle size on the performance of BC pyrolyzed at 300-900 °C in trichloroethylene (TCE) adsorption and persulfate (PS) activation for sulfamethazine (SMT) degradation.

Efficient degradation of sulfamethazine via activation of percarbonate by chalcopyrite.

In this work, the novel application of chalcopyrite (CuFeS) for sodium percarbonate (SPC) activation towards sulfamethazine (SMT) degradation was explored. Several key influencing factors like SPC concentration, CuFeS dosage, reaction temperature, pH value, anions, and humic acid (HA) were investigated. Experimental results indicated that SMT could be effectively degraded in the neutral reaction media by CuFeS/SPC process (86.

Recent advances in waste water treatment through transition metal sulfides-based advanced oxidation processes.

With the ever-growing water pollution issues, advanced oxidation processes (AOPs) have received growing attention due to their high efficiency in the removal of refractory organic pollutants. Transition metal sulfides (TMSs), with excellent optical, electrical, and catalytical performance, are of great interest as heterogeneous catalysts. These TMSs-based heterogeneous catalysts have been demonstrated to becapable and adaptable in water purification through advanced oxidation processes.