Spectroscopic characterization of dissolved organic matter derived from different biochars and their polycylic aromatic hydrocarbons (PAHs) binding affinity

In recent years, biochar has received a great attention due to its high application in different sectors of environment. The feasibility of biochar applications is depended on its physical and chemical properties and biochar-derived dissolved organic matter (DOM) characteristics. This study was conducted to investigate the spectroscopic characteristics of biochar-derived DOM and its binding capacity of hydrophobic organic chemicals (HOCs). DOM solutions were isolated from five differen

一种高效双塔半干法脱硫的装置

本实用新型涉及一种高效双塔半干法脱硫的装置，所述的装置包括进风管道、一级降温脱硫塔、二级循环脱硫塔、喷淋装置、储灰仓、新灰输送装置、仓顶除尘器、布袋除尘器、主风机、流化风机、废灰仓、输送装置、手动插板阀、卸灰阀、紊流器、出风管道和烟囱。本实用新型所述的装置占地少，装备水平适用可靠，脱硫效率高，系统阻力小、能耗低、运行稳定、对烟气量变化的适应性强，投资少，运行成本低，可满足烟气排放环保要求，具有良好的经济效益与环境效益

水体中硼的去除方法研究进展

硼是人体与动 、 植物必需的一种微量元素 。 然而， 当水中硼浓度超过最大允许值， 将对人体和部分动 、 植物产生严重的负面影响 。 硼独特的物化性质导致常规水处理方法对硼的去除效果较差 。 论述了各种水处理除硼方法， 包括化学沉淀 、 吸附 、 离子交换 、 液液萃取 、 纳滤 、 反渗透 、 正渗透 、 膜蒸馏 、 组合工艺和其他方法; 分析了各种除硼方法的分离过程 、 影响因素和优缺点等; 展望了水处理除硼方法发展趋势 ， 认为开发出能在中性 pH 条件下快速高效除硼的膜，以及具有高硼吸附量 、 易再生和回收硼的特效硼吸附剂是除硼水处理技术的发展方向

A quantitative method to assess the ecological indicator system's effectiveness: a case study of the Ecological Province Construction Indicators of China

The ecological indicator system (EIS) is widely used. It is vital to develop a scientific and rational EIS for practical application. Assessment of an EIS's effectiveness is important to understand the gaps between practical indicators and indicators that are considered theoretically ideal. In this paper we develop a conceptual method to quantitatively assess the effectiveness of a practical EIS by comparing it with the ideal EIS that is considered perfect by using three assessment indices: lin