海南岛潜在震源区的研究

本文应用人工神经网络原理,以地震构造和地震活动性为主要特征,对我国海南岛进行了潜在震源区的定量划分。这种划分既反映了当前人们对地震发生规律的认识水平,又为城建部门按照工程重要性和使用年限选取相应的抗震设计参数提供了依据。     

金属络合剂在烟气同时脱硫脱硝中的应用

液相络合法是烟气同时脱硫脱硝中广泛应用的方法之一。液相络合法常用的金属络合剂有亚铁络合剂和钴络合剂等。重点介绍了亚铁氨羧络合剂、含-SH的亚铁络合剂和六氨合钴络合剂、乙二胺合钴络合剂等同时脱硫脱硝的基本过程及常用吸收液的再生方法，指出了金属络合剂在烟气同时脱硫脱硝中应用时存在的问题及今后的发展方向。     

有机物好氧生物降解性二氧化碳生成量测试法的研究

为了探讨测试有机污染物生物降解性方法的通用性和可比性,建立了用二氧化碳生成量来测试有机污染物好氧生物降解性的合理方法。生物反应瓶容积２Ｌ,受试有机物浓度１００ｍｇ／Ｌ,接种污泥浓度５００ｍｇ／Ｌ,反应温度２５℃,反应时间１４ｄ。通过有机生物降解性的分析,提出了一个生物降解性的评价标准－生物降解性指     

乌东德库区消落带土壤水分分布特征

消落带土壤水分是制约植物生长发育的关键因素,对库区消落带生态修复意义重大.本文系统分析了乌东德库区消落带修复试验区土壤含水量分布,探索了土壤水分空间变化和影响因素.结果表明:研究区5月水分含量低于5％,不同试验分区和高程区域土壤水分分布受到微地形、土壤特征、植被类型和植被覆盖度等影响.土壤水分随深度变化的主控因素包括地...     

两相消化系统产酸相酸化特性模型

通过物料衡算建立产酸相的酸化特性分段模型 ,并求得本研究两相消化系统处理淀粉配制废水情况下产酸相动力学参数为 :产酸菌产率系数 Y=0 .2 8mg·mg^-1,产酸菌衰减系数 kd=0.054h^-1,产酸菌最大比增长率μm=3.1 h^-1,饱和系数 Ks=1866mg·L^-1.讨论了产酸相酸化率对整个系统运行状况的影响 ,表明高酸化率有利于提高系统的处理效率和沼气回收 .     

欧盟化学品环境管理战略研究与启示

贯彻化学物质的全生命周期环境风险管理理念,加强新污染物治理,深入打好污染防治攻坚战,是促进经济社会发展全面绿色转型的重要内容。以欧洲化学品可持续战略为主线,分析欧盟与化学品相关的环境管理战略与行动计划,从化学品的安全可持续设计、环境零化学污染、化学物质风险评估机制和风险管理方法等方面进行研究,通过问题总结、差距比对,分析提出对我国开展化学品环境管理工作的启示,对推动精准治污、科学治污、依法治污,促进生态文明建设,有重要借鉴意义。     

Effective and selective separation of perrhenate from acidic wastewater by super-stable,superhydrophobic, and recyclable biosorbent

• A ZnO-biochar hybrid composite was prepared by solvothermal-pyrolysis synthesis. • The superhydrophobic composite is suitable for selective recovery of Re(VII). • The adsorption mechanism is elucidated by experiments and material characterization. The recovery of scattered metal ions such as perrhenate (Re(VII)) from industrial effluents has enormous economic benefits and promotes resource reuse. Nanoscale-metal/biochar hybrid biosorbents are attractive for recovery but are limited by their insufficient stability and low selectivity in harsh environments. Herein, a superstable biochar-based biosorbent composed of ZnO nanoparticles with remarkable superhydrophobic features is fabricated, and its adsorption/desorption capabilities toward Re(VII) in strongly acidic aqueous solutions are investigated. The ZnO nanoparticle/biochar hybrid composite (ZBC) exhibits strong acid resistance and high chemical stability, which are attributable to strong C-O-Zn interactions between the biochar and ZnO nanoparticles. Due to the advantages of its hydrolytic stability, superhydrophobicity, and abundance of Zn-O sites, the ZBC proves suitable for the effective and selective separation of Re(VII) from single, binary and multiple ion systems (pH= 1), with a maximum sorption capacity of 29.41 mg/g. More importantly, this material also shows good recyclability and reusability, with high adsorption efficiency after six adsorption-desorption cycles. The findings in this work demonstrate that a metal/biochar hybrid composite is a promising sorbent for Re(VII) separation.     

Preparation and related properties of geopolymer solidified uranium tailings bodies with various fibers and fiber content

Environmental Science and Pollution Research - Uranium tailing ponds are a potential major source of radioactive pollution. Solidification treatment can control the diffusion and migration of...     

Relationship between exposure of alkylphenols in serum of pregnant women during early pregnancy and adverse birth outcomes

Environmental Science and Pollution Research - Alkylphenols are a type of endocrine disruptors, which are commonly found in personal care products, food, and water and are more harmful to the human...     

Environmental R&D and trade-adjusted carbon emissions: evaluating the role of international trade

Environmental Science and Pollution Research - In the contemporary era, it is evident that consumption-based carbon emissions (CCO2e), adjusted for international trade, are a more accurate and...