How digital transformation facilitate synergy for pollution and carbon reduction: Evidence from China.

Frontier studies have neglected the impact of digital transformation (DT) on the synergy for pollution and carbon reduction (SPCR) from the perspective of micro enterprises. This paper explores the SPCR effect of DT, as well as its mechanism at micro-firm level. The study found that: (1) DT significantly facilitates corporate SPCR. For every 10% increase in the level of DT, the ranking of SPCR will rise by about 2.3 places. This effect is more obvious in high-tech firms and non-heavy polluters, firms in the eastern region in China, and non-SOE. (2) DT creates innovation-driven and structure-optimizing effects, which enhance the corporate green innovation ability, optimize the business structure and capital allocation structure of enterprises, and then drive the SPCR. (3) External public environmental concerns (PEC) and internal corporate ESG governance act as "accelerators" promoting the SPCR effect of DT. Based on these, policy implications are made to accelerate the pace of corporate DT, give full play to the first-mover advantage, and break the "pollution (carbon) lock-in" with a view to providing theoretical references for the listed enterprises' digitalized governance of SPCR, as well as the governmental departments' formulation of relevant guiding policies, and striving to achieve the high-quality development goal.

[Kinetics and Mechanistic Investigation of the Photocatalytic Degradation of Clothianidin].

Clothianidin was selected as a model compound for kinetics and mechanistic investigation of the photocatalytic degradation of nicotine insecticides. We assessed the feasibility of the degradation process, and systematically explored the effects of catalyst amount, reaction temperature, substrate concentration, initial solution pH value, and the presence of inorganic anions and cations on the reaction. The results revealed a Langmuir-Hinshelwood interaction of pseudo-first-order kinetics, showing a rate constant of 0.0506 min-1. The photocatalytic degradation rate was the highest when the amount of catalyst (TiO2) was 3 g·L-1. It was observed that an increase of reaction temperature or lowering of substrate concentration was beneficial to clothianidin degradation. Additionally, the initial pH value of the solution had an obvious effect on the degradation process. Strong acid and alkali were not conducive and the degradation rate constant was the largest at pH=5. Furthermore, most of the inorganic anions and cations significantly hindered the degradation of clothianidin. Finally, the degradation intermediates were identified by GC/MS, and the reaction pathways at the initial stage of the photocatalytic process were proposed:hydroxylation of parent compound, cleavage of N-N bond in the nitroguanidine group, and cleavage of the C-N bond connected to the nitroguanidine and thiazole rings.

[Photocatalytic Degradation Kinetics and Mechanism of Monoazo Dye Acid Yellow 17 by UV/TiO2 in Aqueous Solution].

In order to explore the removal methods, transformation, environmental fate, effect and potential risk of dyes in environmental water, monoazo dye acid yellow 17 (AY17) was selected as model compound to investigate the degradation possibility in different advance oxidation processes (AOPs), and the degradation efficiencies followed the order of UV/H2O2