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991.
Luo ZH Wu YR Pang KL Gu JD Vrijmoed LL 《Environmental science and pollution research international》2011,18(9):1653-1660
Purpose
Dimethyl phthalate esters (DMPEs) are a group of plasticizers commonly detected in the environment with potential adverse human health impact. The degradation of DMPEs by fungal systems has been studied to a limited extent, particularly by yeasts. In this study, a basidiomycetous yeast Trichosporon DMI-5-1 capable of degrading DMPEs was obtained and the degradation pathways were investigated. 相似文献992.
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用生命周期的方法评价铜炉渣作为铜选矿原料的环境影响 总被引:3,自引:0,他引:3
运用生命周期评价的方法,分别对铜炉渣和铜矿石回收铜的选矿过程的环境协调性进行了对比研究,得到了选矿生产过程中各工序的环境负荷数据。评价结果表明,铜炉渣的人类健康损害、生态系统损害和资源损害分别为0.20783、0.00764和0.01919,而铜矿石的分别是0.08165、0.0075和0.08857,铜炉渣生产铜的资源损害比铜矿石低,而人类健康损害和生态系统损害比铜矿石高,铜炉渣选矿生产过程每生产1 kg渣精矿的环境负荷约为铜矿石的1.32倍。随着国内铜精矿供应缺口的增大,从铜炉渣中回收铜资源将显著地提高资源利用率,有利于循环经济的发展。 相似文献
996.
竹材加工剩余物制备竹活性炭及其对Pb^2+的吸附性能 总被引:3,自引:1,他引:2
利用竹材加工剩余物竹蔸、竹节和竹枝制备竹炭,再以H3PO4为活化剂,在活化温度为700 ℃和不同的H3PO4浓度下进行活化制备竹活性炭,测定了吸附性能最强的竹活性炭在不同吸附时间和Pb2+初始浓度下对Pb2+的吸附率,并进行了结构表征.结果表明,当H3PO4溶液质量分数为45%时,所制备的竹活性炭吸附性能最强,其中竹蔸活性炭的Pb2+吸附性能接近于商品活性炭;竹蔸活性炭吸附Pb2+的吸附时间在120~180 min为佳;根据Langmuir最大吸附量计算公式求得竹蔸活性炭最大吸附量为91.1 mg/g.竹枝炭、竹节炭与竹篼炭的孔隙度分别为0.656、0.698和0.740,竹枝活性炭、竹节活性炭与竹篼活性炭的孔隙度分别为0.690、0.715和0.755;竹篼炭和竹篼活性炭比表面积分别为110.354、462.069 m2/g,孔容分别为0.090、0.235 cm3/g,平均孔径分别为31.552、20.368 . 相似文献
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Assessment of sampling designs to measure riverine fluxes from the Pearl River Delta, China to the South China Sea 总被引:1,自引:0,他引:1
Ni HG Lu FH Luo XL Tian HY Wang JZ Guan YF Chen SJ Luo XJ Zeng EY 《Environmental monitoring and assessment》2008,143(1-3):291-301
The Pearl River Delta (PRD), located in South China and adjacent to the South China Sea, is comprised of a complicated hydrological system; therefore, it was a great challenge to sample adequately to measure fluxes of organic and inorganic materials to the coastal ocean. In this study, several sampling designs, including five-point (the number of sampling points along the river cross-section and three samples collected at the upper, middle, and bottom parts at each vertical line), three-point (at the middle and two other profiles), one-point (at the middle profile), and single-point (upper, middle, or bottom sub-sampling point at the middle profile) methods, were assessed using total organic carbon (TOC) and suspended particulate matter (SPM) as the measurables. Statistical analysis showed that the three- and five-point designs were consistent with one another for TOC measurements (p > 0.05). The three- and one-point sampling methods also yielded similar TOC results (95% of the differences within 10%). Single-point sampling yielded considerably larger errors than the three- and one-point designs, relative to the results from the five-point design, but sampling at the middle sub-point from the middle profile of a river achieved a relatively smaller error than sampling at the upper or bottom sub-point. Comparison of the sampling frequencies of 12 times a year, four times a year, and twice a year indicated that the frequency of twice a year was sufficient to acquire representative TOC data, but larger sample size and higher sampling frequency were deemed necessary to characterize SPM. 相似文献
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