钱塘江流域污染负荷及水环境容量研究

采用排污系数法计算了钱塘江流域不同污染源COD和氨氮的污染负荷,研究了整个流域90%、75%和so%水文保证率下的水环境容量.以流域水质目标为出发点,考虑污染负荷和流域社会经济发展需求相协调的原则,确定了钱塘江流域水污染总量控制阶段性目标.     

碱渣对锌(Ⅱ)离子吸附特性的研究

研究了锌在碱渣表面的吸附特征.结果表明,碱渣总吸附量随体系温度的升高而降低;随体系 pH 值的升高而增加;随吸附质初始浓度的增加而增大.在 pH<5.51 时其等温吸附能较好地符合 Freudlich 等温吸附规律,而在 pH5.51 时,能较好地符合 Langmuir 等温吸附规律,吸附热随 pH 的增大而升高.当pH≤5.51时,碱渣的吸附力以范德华力平和疏水键力的作用为主,而当 pH6.17 时,以化学键力为主.在 pH 为 5.05、6.07和7.03时,碱渣对 Zn26 的吸附动力学方程都以 Langmuir 方程的拟合效果最优.     

WK－1A型二氧化硫自动测定仪测定烟气中SO_2的方法研究

本文研究了仪器电导法测定烟气中ＳＯ２的监测方法,并与碘量法进行了比较,提出了吸收液测定的影响及吸收液的配制方法。本方法简单快速,能够满足烟气中ＳＯ２监测工作的要求。     

浅谈挥发性有机废气的处理方法

本文介绍了挥发性有机废气的生物处理方法和技术应用,对在国内外应用较广的吸附法、热破坏法、冷凝法、生物法进行了阐述,通过和其它废气处理工艺进行的经济技术对比,表明了生物处理工艺在其适用范围内的优越性.     

气相色谱法测定鱼体中的PCB及有机氯农药

论述了气相色谱法测定鱼体中ＰＣＢ及有机氯农药的方法步骤,测定了德国莱茵河鱼样中的ＰＣＢ及有机氯农药的含量,并对测量结果进行了评价。     

强化企业环境监测工作的途径和方法探讨

企业环境监测工作有其自身特点,本文从监测对象、监测项目、监测职能、监测手段、监测信息处理等方面论述了强化企业环境监测的途径和方法。     

Effects of several amendments on rice growth and uptake of copper and cadmium from a contaminated soil

Heavy metals in variable charge soil are highly bioavailable and easy to transfer into plants. Since it is impossible to completely eliminate rice planting on contaminated soils, some remediation and mitigation techniques are necessary to reduce metal bioavailability and uptake by rice. This pot experiment investigated the e ects of seven amendments on the growth of rice and uptake of heavy metals from a paddy soil that was contaminated by copper and cadmium. The best results were from the application of limestone that increased grain yield by 12.5–16.5 fold, and decreased Cu and Cd concentrations in grain by 23.0%–50.4%. Application of calcium magnesium phosphate, calcium silicate, pig manure, and peat also increased the grain yield by 0.3–15.3 fold, and e ectively decreased the Cu and Cd concentrations in grain. Cd concentration in grain was slightly reduced in the treatments of Chinese milk vetch and zinc sulfate. Concentrations of Cu and Cd in grain and straw were dependent on the available Cu and Cd in the soils, and soil available Cu and Cd were significantly a ected by the soil pH.     

Effect of first-stage aeration on treatment of domestic sewage in different hybrid constructed wetlands

Environmental Science and Pollution Research - Two sets of hybrid constructed wetlands (HCWs) with the first-stage aeration were used to treat actual domestic sewage in this paper, where the...     

Impact of pyrolysis temperature and activation on oily sludge-derived char for Pb(II) and Cd(II) removal from aqueous solution

Environmental Science and Pollution Research - This study investigated the Pb(II) and Cd(II) sorption from aqueous solution by oily sludge-derived char (OSDC) prepared at different pyrolysis...     

Estimating potential evapotranspiration based on self-optimizing nearest neighbor algorithms: a case study in arid–semiarid environments,Northwest of China

Environmental Science and Pollution Research - Changes in potential evapotranspiration will affect the surface ecology and environment of the land. Accurate and quick estimation of potential...