铬污染,chromium pollution
1)chromium pollution铬污染
1.The research reveals that the wastewater from the livestock and poultry breeding farm is the important source of chromium pollution in the streams of the villages.本研究发现畜禽养殖废水是农村溪流铬污染的重要来源;在南山溪中,T-Cr浓度符合C=0。
英文短句/例句

1.Characteristics of Chromium Pollution at Chromium-Containing Slag Site and Chromium (VI) Bioremediation in the Contaminated Soil铬渣堆场铬污染特征及其铬污染土壤微生物修复研究
2.Improvement in electrokinetic remediation of chromium contaminated soil with polarity exchange technique交换电极法强化电动修复铬污染土壤
3.Cr distribution and speciation in soil at Xinchengzi chromic residue piled site of Shenyang,Liaoning province沈阳市新城子铬渣堆存区土壤铬污染分布及形态研究
4.Study on Pollution Distribution Characteristics of Chromic Waste Coverage Area in Shenyang Xinchengzi沈阳市新城子铬渣堆存区土壤铬污染分布及形态分析
5.ELECTROKINETIC TREATMENT OF A CHROMIUM CONTAMINATED YELLOW BROWN SOIL AS AFFECTED BY VOLTAGE施加不同电压对铬污染黄棕壤电动过程的影响
6.On Agricultural Environmental Portection in Line with Farmland Polluted by B and Cr in Xian从西安的硼、铬污染农田论农业环境保护
7.Study of Antidotal Action on Anaerobic Residues for Polluted Soil by Chromium;厌氧发酵残余物对铬污染土壤的解毒效果研究
8.Measurement of the Chromium s Pollution in Lower Reaches of Hanjiang River as well as Chaozhou City Zone;韩江潮州市区江段水质六价铬污染程度的测定
9.2D Cross Electric Field for Electrokinetic Remediation of Chromium Contaminated Soil二维叠加电场电动修复铬污染土壤的研究
10.Research of Aerobic Co-composting of Low Concentration Chromium-Contaminated Soil and Food Wastes低浓度铬污染土壤与餐厨垃圾混合堆肥研究
11.Study on Amarantus viridis L.phytoremediation in the soil of leather industry polluted by chromic heavy metal野苋菜植物修复皮革工业铬污染土壤的研究
12.Contamination Investigation of Copper,zinc,chromiun in Rice and Maize in Xiong yue熊岳地区大米、玉米中铜、锌、铬污染情况调查
13.Influence of Complexes on Electrokinetic Remediation in Chromium Contaminated Soil络合剂对铬污染土壤电动修复作用的影响
14.Study on pollution characteristics of contaminated sites with chrome and discussion on common remediation technologies铬渣污染场地污染状况研究与修复技术分析
15.Study on Pollution Situation at Typical Chrome Residue Contaminated Sites and Corresponding Integrated Remediation Plan典型铬渣污染场地的污染状况与综合整治对策
16.The Effect of Humic Acids on Zero Value Iron(ZVI) Reduction of Cr(VI) in Contamintated Water;腐殖酸对零价铁去除污染水体中六价铬的影响
17.The Reduction of Cr(VI) in Contamintated Water Using CMC-stabilized Zero Valent Iron Nanoparticles;CMC对纳米零价铁去除污染水体中六价铬的影响
18.Effect of Silicates on Health Risk of Brassica Chinensis under the stress of Cr-Pb pollution硅酸盐对铬、铅污染小白菜健康风险的影响
相关短句/例句

Cr pollution铬污染
1.Through field investigation and laboratory analysis,we studied the soil Cr pollution in residue piling yard in Qinghai Province.通过野外观测与室内分析相结合的方法,研究了青海海北化工厂铬矿堆渣场土壤铬污染状况。
3)chrome pollution铬污染
1.By investigating the chrome pollution in Tai Bai Xi'an, the vertical penetration experiment in the unsturated zone .通过铬在包气带的垂直渗滤试验探讨了铬对地下水污染的机制 ,认识到地下水铬污染的主要途径是通过包气带渗入 ,铬在包气带中的垂直迁移性好 ,铬进入含水层后 ,在水动力条件及浓度的影响下 ,可发生运移—弥散作用 ,造成大面积地下水污染 ,严重影响生态环
4)hexavalent chromium pollution铬(Ⅵ)污染
1.The hexavalent chromium pollution sources were determined by hydrogen and oxygen stable isotopes which were often used for investigating the hydraulic connection between groundwater and surface water,and the hydrochemical composition of different water bodies.利用氢氧稳定同位素在辨析不同水体水力联系方面的原理,结合不同水体的水化学组成,判定岩溶地下水中铬(Ⅵ)污染来源。
5)Control of chromium pollution铬污染控制
6)chromium-contaminated soil铬污染土壤
1.Conducts aerobic co-composting of low concentration chromium-contaminated soil and food wastes, and studies the mutual influence on chromium-contaminated soil and food wastes, the works are as follows:(1) Studies the influence of mass ratio of food wastes and chromium-contaminated soil on the compost process parameter, such as pH, organic matter, C/N etc.本文通过低浓度铬污染土壤与餐厨垃圾混合堆肥,研究堆肥过程中二者之间的相互影响,主要工作如下:(1)研究餐厨垃圾与铬污染土壤堆肥的配比对及堆肥过程中pH、有机质、碳氮比等参数的变化的影响以及堆肥过程中铬形态、浸出毒性的变化,从而确定餐厨垃圾与铬污染土壤堆肥的最佳配比。
延伸阅读

铬污染  铬是银白色金属,在自然界中主要形成铬铁矿。化合价有+2、+3、+6三种。铬的天然来源主要是岩石风化,由此而来的铬大多是三价铬。    铬主要用于金属加工、电镀、制革等行业。为了防止工业生产过程中循环水对设备的腐蚀,常须加入铬酸盐。工业部门排放的废水和废气,是环境中铬的人为来源。工业废水中的铬主要是六价化合物,如铬酸根离子(CrO厈)。冶金、水泥等工业,以及煤和石油燃烧的废气中,含有颗粒态的铬。    铬在环境中的迁移转化  由于风化作用进入土壤中的铬,容易氧化成可溶性的复合阴离子,然后通过淋洗转移到地面水或地下水中。天然水中一般仅含微量的铬,通过河流输送入海,沉于海底。海水中的铬含量不到1ppb。    水体中的三价铬主要被吸附在固体物质上而存在于沉积物中;六价铬则多溶于水中。六价铬在水体中是稳定的,但在厌氧条件下可还原为三价铬。三价铬的盐类可在中性或弱碱性溶液中水解,生成不溶于水的氢氧化铬而沉入水底。三价铬在天然水中也可被氧化,但速率很低。环境中的三价铬和六价铬可以互相转化,所以近来倾向于根据铬的总含量,而不是根据六价铬的含量来规定水质标准。    危害  铬是人和动物所必需的一种微量元素,躯体缺铬可引起动脉粥样硬化症。铬对植物生长有刺激作用,可提高收获量。但如含铬过多,对人和动植物都是有害的。    三价铬和六价铬对人体健康都有害,被怀疑有致癌作用。一般认为六价铬的毒性强,更易为人体吸收,而且可在体内蓄积(见铬污染对健康的影响)。    三价铬和六价铬对水生生物都有致死作用。铬能在鱼体内蓄积。三价铬对鱼类的毒性比六价铬高。土壤中铬过多时,会抑制有机物质的硝化作用,并使铬在植物体内蓄积。据试验,水中含铬在1ppm时可刺激作物生长,1~10ppm时会使作物生长减缓,到100ppm时则几乎完全使作物停止生长,濒于死亡。废水中含有铬化合物,能降低废水生化处理效率。    环境标准  中国规定生活饮用水中六价铬的浓度应低于0.05毫克/升;地面水中铬的最高容许浓度为0.5毫克/升(三价铬)和0.05毫克/升(六价铬);工业废水中六价铬及其化合物最高容许排放标准为 0.5毫克/升(按六价铬计);渔业用水中铬最高容许浓度为 0.5毫克/升(三价铬)和0.05毫克/升(六价铬)。居住区大气中六价铬的最高容许浓度为0.0015毫克/米3(一次测定值);车间空气中三氧化二铬、铬酸盐、重铬酸盐的最高容许浓度为0.1毫克/米3(换算成三氧化二铬)。