Synthesis and Characterization of β-Cyclodextrin Modified Biochar Environmental Remediation Materials

In this paper, biochar (BC) was used as raw material, activated by deionizing aqueous solution, NaCl solution, CA solution and HCl solution respectively. Epichlorohydrin (EPI) was used as crosslinking agent, and β-cyclodextrin (β-CD) was used to modify biochar (BC). The prepared modified biochar materials were labeled with β-CDBC, β-CDBC-Na, β-CDBC-CA and β-CDBC-H, respectively. The infrared spectrum, X-ray diffractometer, scanning electron microscope and specific surface area of the four modified materials were tested. The results showed that the C-O stretching vibration peak at 1020 cm−1 of the modified materials was slightly offset compared with that of biochar. The characteristic absorption peaks of XRD pattern decrease obviously at 2θ = 26.7˚ and 29.5˚. It can be obviously observed on the electron microscope image that the surface is loaded or formed clathrates, and BET data and graphs also show that the specific surface area of the modified biochar is larger. Therefore, β-cyclodextrin successfully modified biochar and formed clathrates on the surface of biochar or was loaded in the pore structure of biochar, especially β-CDBC-CA achieved better modification effect. Because biochar and β-cyclodextrin raw materials are cheap, easy to prepare and green, and less prone to secondary pollution, it has a good advantage in environmental governance.

A Mechanism for Digital Finance to Drive Green and Low-Carbon Development

Given the global focus on green and low-carbon development and the increasing prominence of digital finance,it is particularly important to explore how to leverage digital finance to achieve these environmental goals.This study,through mechanism analysis,deeply examines how China’s digital finance promotes green and low-carbon development and elucidates the positive interaction between digital finance and the green industry.The study found that digital finance,through more flexible and efficient financial functions,alters the cost structure of carbon emissions,and reduces the risks and costs of green investments,thereby creating a cooperative green mechanism benefiting all parties,and guiding social groups toward a green and low-carbon transformation.Additionally,the rapid development of digital finance has strengthened the implementation of environmental protection policies,effectively promoted the expansion of the environmental protection industry,and established the green ethos as a mainstream concept in financial development.This study aims to provide reference perspectives and suggestions,assist policymakers in promoting the green and lowcarbon development of digital finance,and offer insights into the integrated development of digital finance and the green environmental protection industry.

Environmental Technical Standards and the Green Transition of China’s Manufacturing Industry

Distinct from the existing literature conforming to the Porter hypothesis which emphasizes the technological innovation mechanism,this paper examines the mechanism of technological transformation through which environmental technical standards influence the manufacturing industry in reducing emissions and improving efficiency(i.e.green transition).Furthermore,drawing upon enterprise samples from the databases of Chinese Industrial Enterprises and Chinese Industrial Pollution Sources from Major Monitored Enterprises,it empirically validates the results of the theoretical analysis.Overall,our research reveals that environmental technical standards can propel manufacturing enterprises to reduce pollution and increase productivity by following an incremental path of technological transformation,thereby achieving a green transition.Moreover,environmental technical standards indirectly promote green technology innovation in the upstream equipment manufacturing enterprises.Heterogeneity analysis further shows that environmental technical standards have a stronger effect of green transition on those companies with higher pollution emission intensity,lower productivity,slower capital renewal and stronger financing capacity prior to implementing the environmental policies.

Modification of the Leontief-Ford Input-Output Model for the Green Economy Goals and Environment Protection

The economics’ ecological modernization approach based on the input-output balance model is considered in the paper. The government measures on Russian Federation’s transition to green economy on reducing of greenhouse gas emissions are analyzed. In an article for green economy evaluation, including greenhouse gas emissions per capita and per unit of GDP, the indicator of the production environmental costs is proposed to include. The authors suppose adding and to modernize the Leontief-Ford model of input-output balance by economic evaluation of the environment pollution effects. This model is proposed to consider macro-economic assessment of environmental damage, health deterioration due to environmental pollution, as well as the use costs of the environmentally friendly technologies, the environmental and energy innovations’ implementation, climate change. The proposed modified model of environmentally oriented input-output balance can be used in the economic compensation system implementation on natural capital use and ecosystem services’ consuming in countries and their regions. The modified Leontief-Ford model proposed in the paper can be used for green economy development calculating, for example in Russia during the development of measures for the environment and economic development. Also this paper opens discussions for opportunities of the further possible integration of the theoretical models for environment protection decision-making.

环保税与企业绿色创新边界——基于广度与深度双重视角

基于波特假说和高层梯队理论,以2013—2021年我国沪深A股重污染行业上市公司为研究样本,采用企业年报文本信息挖掘的环保税和高管环保意识数据与国际专利分类提供的专利化绿色创新活动信息,并通过企业创新动机变量识别两者的因果关系。研究表明:环保税对企业绿色创新边界拓展具有显著的正向影响,且对绿色创新边界广度拓展的促进作用更为强烈。环保税可通过提高高管环保意识影响企业绿色创新边界突破,对企业绿色创新边界广度突破的驱动作用在低融资约束的企业、处于成长期的企业和具有环保背景的企业中效果更明显,对企业绿色创新边界深度突破的驱动作用在大型企业中效果更明显。因此,从政策操作角度看,可以适度加大环保税的征收力度,进一步激发高管环保意识,采取差异化和精准化的环保税政策措施。

绿色信贷贴息政策与企业环境信息披露质量——基于自愿性与强制性披露动机下的机制分析

披露高质量的环境信息不仅是企业环境管理制度的制订基础,也是推动生态环境治理体系和治理能力现代化的重要举措。本文基于2008~2023年上市公司样本,使用渐进双重差分法,实证检验了绿色信贷贴息政策对企业环境信息披露质量的激励效应及其作用机制。研究发现:(1)财政与金融相协调的绿色信贷贴息政策能显著改善企业环境信息披露质量;(2)核心机制在于自愿性披露机制和强制性披露机制,前者主要是通过降低债务融资成本和增加高管绿色认知得以实现,后者表现为通过政府监管水平提升引致的合规效应强制企业提高环境信息披露质量;(3)政策在非国有企业、劳动密集型企业和市场化程度高的地区存在更强的激励效应。本文结论为其他激励性绿色金融政策的制定与完善提供理论依据与决策参考。

Environmental Factors Influencing Seed Germination Characteristics of Vicious Weed Green Foxtail

[ Objective] The paper was to optimize the optimal conditions for seed germination and seedling emergence of green foxtail [ Setar/a viridis （ L. ） Beauv. ], so as to solve the problem of serious damage caused by green foxtail. [Method] Using the orthogenal test and the LSD method of software SPSS 18.0, with the number of emerged seedlings of green foxtail as the evaluation index, the influencing factors such as pretreatment of green foxtail, earth covering depth, soil temperature and soil moisture content were compared in the test. [Result] These four experimental factors had great impact on seed germination characteristics of green foxtail. The optimal scheme for seedling emergence of green foxtail was as follows： pretreatment of green foxtail for 3 d, earth covering depth 0.5 cm, soil temperature 32 ℃, soil moisture content 15%. The optimum condition was consistent with the actual situation of serious damage of green foxtail （ suffering moderate and heavy rainfall after sowing and before seedling of millet ）. Avoiding sowing millet before moderate and heavy rainfall could effectively control serious damage of green fox＇tail. [ Conclusion] The study provided theoretical support for effective control against the vicious weed green foxtail.

环境规制下企业绿色技术创新行为研究:实质性抑或策略性?

本文采用2011—2022年沪深A股上市公司数据,结合企业绿色专利研究数据库的绿色专利申请数量,将新修订的《中华人民共和国环境保护法》作为环境规制的典型代表,构建双重差分模型,检验该法对企业绿色技术创新的影响。研究结果显示,新环境保护法的实施提高了企业的总体绿色技术创新水平,这一效果主要通过促进策略性绿色技术创新实现,而实质性绿色技术创新则受到抑制。通过稳健性检验,研究结论得到了验证。作用机制分析结果显示,新环境保护法通过加大环保处罚力度、严格环境信息披露要求和提高管理者环境关注度三个机制促进了企业总体绿色技术创新。交互效应分析结果显示,融资约束增强了新环境保护法对实质性绿色技术创新的抑制作用,而财务风险则增强了该法对策略性绿色技术创新的促进作用。异质性分析结果表明,新环境保护法对高治理水平企业和大型企业的策略性绿色技术创新的促进作用较强,对实质性绿色技术创新的负面影响较弱。本文的研究为中国推进生态文明建设和实现“双碳”目标提供了企业绿色创新的实践参考。

企业碳排放、碳信息披露与盈余操纵

“双碳”背景下,企业碳排放对财务表现的消极影响逐渐增强,成为盈余操纵的新驱动因素。以2013—2022年中国沪深A股披露社会责任报告等相关信息的上市企业为研究样本,实证研究碳排放对企业盈余操纵行为的影响及作用路径。研究发现:碳排放显著加剧了企业盈余操纵行为;碳排放信息披露数量作为调节变量,能够加剧碳排放与盈余操纵的正向联系;路径检验结果表明,碳排放通过增加环保费用与绿色转型费用加剧企业盈余操纵程度;异质性分析结果表明,政府环保补贴、市场绿色资助、机构投资调研以及较高的审计质量均能缓解碳排放对盈余操纵的加剧作用。上述结论在经过内生性处理和稳健性检验后仍成立。研究为缓解碳排放对企业经营的负面影响,提升盈余信息质量提供了参考。

数字经济、高管环保背景与企业绿色创新

推动数字经济发展,促进企业绿色创新,对我国同时实现经济增长和环境友好型发展具有重要意义。文章以2011—2021年A股上市公司为样本,实证检验了数字经济对企业绿色创新的影响。研究发现,数字经济能够促进企业绿色创新水平的提高,且高管环保背景能够正向调节数字经济对企业绿色创新的影响,作用机制发现数字经济发展能够通过提升企业研发投入和增强环境规制来实现对企业绿色创新的正向影响。异质性检验发现,当企业为高科技企业、ESG表现较好时,数字经济对绿色创新的促进作用更为显著。研究结论能为提高企业的绿色创新水平提供一定的指导,对我国实现绿色转型发展具有一定的贡献价值。

智慧城市试点政策对城市碳排放强度的影响及机制分析

本文根据2000—2022年从中国218个城市收集的数据,使用多期模型实证分析了智慧城市试点政策对碳强度的影响,并从理论和实证角度分析了智慧城镇建设对城市碳强度的作用和机制,为未来构建更加完善的智慧城市提供经验指导。实证结果证实了试点政策可以有效降低城市地区的二氧化碳排放强度。同时,鼓励产业结构转型和现代化、促进人才库形式的高素质人才流动、采取适当的环境监管措施是试点城市降低碳减排强度的三种有效方法。此外,试点城市的碳减排强度因地理位置、数字基础设施水平和城市规模不同而有所差异。

Research and Application of an Environmental-Friendly Low-Damage and High Salt-Resistance Slick Water Fracturing Fluid System

The Sulige gas field is a typical low-pressure low-permeability tight sandstone gas reservoir. The reservoir has poor seepage capacity, strong heterogeneity, high mineralization of formation water and extremely scarce water resources on the site. These unfavorable factors have brought great difficulties to the on-site mining process. Now, a nano-composite green environmental protection slick water fracturing fluid system CQFR can be quickly dissolved because of the larger specific surface area, and the small molecular size makes the damage to the reservoir less than 5%, and the average drag reduction effect can reach more than 73%. It can quickly and well dissolve and maintain performance under high salinity conditions and fracturing flowback fluids. It responds well to the complex reservoir conditions on the construction site and makes the flowback fluid recyable, which greatly reduces the consumption of water resources on the construction site and effectively improves the construction efficiency and economic benefits.

数字化转型对企业环境绩效影响的实证研究——兼论环境信息披露的调节作用

选取2007—2022年我国沪深A股上市企业作为研究对象,实证考察了数字化转型对企业环境绩效的影响及其作用机制,并分析环境信息披露的调节作用。研究发现:数字化转型有助于提升企业环境绩效,环境信息披露发挥了正向调节作用。作用机制分析表明,数字化转型对企业环境绩效的助力作用主要是通过政府环保补助和绿色技术创新得以实现的。此外,基于产权性质、企业行业属性、企业技术特征的异质性分析发现,在国有企业、重污染企业、高新技术企业中企业环境绩效的提升与数字化转型有着密切的联系。研究结果可为企业更好地利用数字化转型赋能生态文明建设、实现国家经济社会发展的全面绿色转型等提供决策参考。

绿色金融对地区环境绩效的影响研究——基于fsQCA的组态分析

绿色金融的发展对于环境保护具有重要意义,如何协同绿色金融各要素,实现地区环境绩效的提升是亟待解决的现实问题。论文采用考虑非期望产出的Super-SBM-DEA模型,在精准测度地区环境绩效的基础上,运用模糊集定性比较分析法(fsQCA),从组态视角分析绿色金融各要素在实现高环境绩效方面的驱动机制。研究发现:(1)中国省域环境绩效总体呈现出“东—中—西”阶梯式下降的空间分布特征。(2)绿色金融的单个要素不是构成高环境绩效的必要条件。(3)绿色金融促进地区环境绩效存在三条驱动路径:“绿色证券—绿色投资”双轮驱动型和“绿色信贷—碳金融”双轮驱动型为主的双轮驱动路径、“绿色信贷—绿色保险—绿色投资—碳金融”协调发展型为主的多维协同型发展路径、“绿色证券—绿色信贷—碳金融”三元并驾型和“绿色证券—绿色投资—碳金融”三元并驾型为主的三元并驾均衡驱动路径。研究结论对推动实现经济的绿色可持续发展具有一定的理论意义和政策启示。

环境保护税、绿色技术创新与城市绿色低碳发展——以长三角地区为例

基于2011—2021年长三角地区41个城市的面板数据,运用CRITIC-熵权法测算长三角地区各城市绿色低碳发展水平,并构建中介效应模型和空间杜宾模型研究环境保护税对长三角地区绿色低碳发展影响。结果表明:(1)长三角地区绿色低碳发展存在明显的空间依赖性;(2)环境保护税对长三角地区绿色低碳发展存在显著的正向影响,并通过绿色技术创新对长三角地区绿色低碳发展产生显著的正效应;(3)环境保护税对长三角地区绿色低碳发展的正向影响存在空间溢出性和异质性的特征。其中,核心区环境保护税的直接效应显著为正,但间接效应并不显著;扩容区环境保护税的直接效应不显著,且间接效应显著为负。

The Low-Carbon and Environmental Protection of Textile and Garment in China

It should be transformed from the extensive development in the past to the new normal form of environmentally friendly pattern of “save energy, lower consumption and less pollution” in the Textile and Garment. For the pollution problem in China’s textile and garment industry, the author particularly analyzes the pollution of the textile and garment industry mainly occurred in the process of textile and clothing production and sales in this article. Finally, the author puts forward detail measure to control the pollution from the two aspects and advocates the concept of low-carbon environmental protection and green lifestyle. The low-carbon environmental protection has become a phenomenon in Textile and Apparel.

领导干部自然资源资产离任审计与城市绿色全要素生产率

提高城市绿色全要素生产率是实现经济高质量发展的重要方式。基于我国284个城市2010—2017年的面板数据,构建多期双重差分模型,实证检验领导干部自然资源资产离任审计对提高城市绿色全要素生产率的作用。结果表明,相较于未试点城市,实施自然资源资产离任审计试点的城市的绿色全要素生产率显著提高。进一步研究发现,自然资源资产离任审计通过绿色创新提高城市绿色全要素生产率,数字技术能够增强该政策效应,且城市经济发展水平越高或财政压力越小,该政策效应越明显。研究结论不仅为自然资源资产离任审计推动经济高质量发展提供了经验证据,而且为持续提高城市绿色全要素生产率提供了理论支撑和政策依据。

环境分权对区域工业绿色发展影响的空间溢出效应研究

在理论机制分析的基础上,基于2005—2020年我国30个省份的面板数据,采用Super-SBM模型测度了区域工业绿色发展水平,进而采用空间计量模型等方法检验了环境分权对区域工业绿色发展的影响。研究发现:(1)在考虑空间溢出效应的前提下,环境分权对区域工业绿色发展具有显著的抑制作用,但空间影响程度较为有限。使用工具变量处理内生性问题后,上述核心结论依然成立。(2)环境行政分权、环境监察分权及环境监测分权对工业绿色发展在影响方向或强度上存在显著差异。(3)进一步分析表明,财政分权、地方政府竞争程度的提升,强化了环境分权对工业绿色发展的抑制作用。(4)相比于东部地区,环境分权及其细分指标在中部和西部地区的边际效应更强;相比于2005—2012年,2013—2020年环境分权及细分指标的边际效应有所减弱。因此,建议建立跨级环境治理协作机制,强化数据透明度和公信力,明确权责匹配原则以及在环保垂管体制下细化环境分权政策。

基于IPCC清单指南的我国油气生产系统甲烷排放研究

近年来,全球油气企业已经认识到了甲烷排放控制的重要意义,纷纷采取联合行动,积极开展甲烷排放控制。而准确核算和评估甲烷排放是进行有效控制工作的前提,因此利用IPCC第一层方法对2003-2021年我国油气生产重点省份的甲烷排放进行了核算与分析。结果显示,2003-2021年我国各省份油气生产环节甲烷排放总体呈现持续增加的趋势。从空间分布上看,各省份甲烷排放空间分布差异较大,2003年东北地区与华北地区甲烷排放量较高,而近些年这些地区呈逐渐降低趋势,2011年以来,陕西、新疆、四川等西部地区甲烷排放持续增加。根据现有的清单研究结果对比发现,由于排放源完整性、核算方法和数据精度方面的差异,目前对部分省份油气系统甲烷排放的估算仍存在相当程度的不确定性。由此,从国家清单编制常态化、清单编制方法学完善、设备管理、数据采集等方面,对完善各省甲烷排放核算工作提出了相应的建议。

绿色建筑材料的环保性能评估与应用前景

文章以具体工程项目为例,探讨绿色建筑材料的应用优势,并通过绿色建筑材料在工程中的具体运用,评估材料的环保性能,同时探讨绿色建筑材料的应用前景,最后从不同角度出发,提出绿色建筑材料的发展对策。