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提高酸性污泥预处理固液分离效果的工艺条件探讨
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作者 王磊 王冬红 《硫磷设计与粉体工程》 CAS 2024年第3期33-36,I0002,共5页
化工、冶金行业生产过程中产生的含硫、砷、重金属等离子的酸性废水,采用中和、硫化处理时会产出液含量较高的酸性污泥,再利用较难。针对酸性污泥的物化性质,研究了压力、温度对其组分的影响,探讨污泥固液分离的有利条件,从而实现酸性... 化工、冶金行业生产过程中产生的含硫、砷、重金属等离子的酸性废水,采用中和、硫化处理时会产出液含量较高的酸性污泥,再利用较难。针对酸性污泥的物化性质,研究了压力、温度对其组分的影响,探讨污泥固液分离的有利条件,从而实现酸性污泥减排和综合利用的目的。 展开更多
关键词 酸性污泥 物化特性 工艺条件 减排 综合利用 试验研究
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粉煤灰电石渣用作金属废渣和酸性铬污泥的稳定/固化剂的试验研究 被引量:2
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作者 李新国 许增贵 《环境保护科学》 CAS 2002年第3期32-34,共3页
粉煤灰、电石渣与水泥存在着某些相似的理化性质 ,研究它们对金属废物和酸性铬污泥的稳定 /固化作用 ,实现以废治废将具有重要意义。本文通过试验研究证实了粉煤灰和电石渣对金属废渣有良好的稳定 /固化作用 ;对酸性铬污泥 ,电石渣有很... 粉煤灰、电石渣与水泥存在着某些相似的理化性质 ,研究它们对金属废物和酸性铬污泥的稳定 /固化作用 ,实现以废治废将具有重要意义。本文通过试验研究证实了粉煤灰和电石渣对金属废渣有良好的稳定 /固化作用 ;对酸性铬污泥 ,电石渣有很好的稳定 /固化作用 ,二者完全可以替代水泥用作金属废渣和酸性铬污泥的固化剂。 展开更多
关键词 酸性污泥 粉煤灰 电石渣 金属废物 试验研究 稳定剂 废物处理 固化剂
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酸性废水污泥在重金属矿业废弃地生态修复中的应用 被引量:4
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作者 杨涛涛 朱冉冉 《节能与环保》 2020年第5期95-96,共2页
本文对酸性废水污泥在重金属矿业废弃地生态修复中应用的可行性进行了分析探讨,并通过在大宝山矿的野外试验进行了效果验证。
关键词 酸性废水污泥 重金属矿业废弃地 生态修复
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不锈钢冷轧废水站污泥脱水系统
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作者 李善仁 何国富 +1 位作者 刘金成 何迎春 《工业水处理》 CAS CSCD 北大核心 2013年第4期77-79,共3页
介绍了采用板框压滤机处理不锈钢冷轧废水重金属污泥的工艺。设计泥量(以干污泥计)24 t/d,各水处理子系统的污泥,主要以含酸废水处理系统的污泥为主,泵入污泥浓缩池浓缩后,含固率8%~10%的污泥通过变频器控制的偏心单螺杆泵输送至板框... 介绍了采用板框压滤机处理不锈钢冷轧废水重金属污泥的工艺。设计泥量(以干污泥计)24 t/d,各水处理子系统的污泥,主要以含酸废水处理系统的污泥为主,泵入污泥浓缩池浓缩后,含固率8%~10%的污泥通过变频器控制的偏心单螺杆泵输送至板框压滤机。经过板框压滤机脱水后的泥饼含固率要求大于35%。系统自2007年9月初调试正常以来,运行良好,泥饼含固率稳定在35%以上。 展开更多
关键词 不锈钢冷轧 酸性废水污泥 污泥脱水 板框压滤机
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Selectively leaching Cu(Ⅱ) and Ni(Ⅱ) from acid mine drainage sludge by using ethylenediamine-ammonium sulfate 被引量:1
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作者 李德良 王淀佐 J A Finch 《中国有色金属学会会刊:英文版》 EI CSCD 2002年第6期1176-1179,共4页
A method based on controlling the complexation precipitation equilibrium of metal ions was proposed to selectively recover nickel and copper from hydroxide sludge formed by lime neutralization of acid mine drainage(AM... A method based on controlling the complexation precipitation equilibrium of metal ions was proposed to selectively recover nickel and copper from hydroxide sludge formed by lime neutralization of acid mine drainage(AMD). Ethylenediamine(EDA) and ammonium sulfate were chosen as complex reagent and precipitating reagent, respectively, to dissolve target metal hydroxides from sludge and limit useless metal ions in the pregnant solution. Results from both synthetic and natural samples show the excellent selectivity for the target metals(copper and nickel) against Fe(Ⅲ), Ca(Ⅱ) and Mg(Ⅱ), 99% recovery of Cu(Ⅱ) and Ni(Ⅱ) and shorter leaching time can be reached by this process, and the resultant solution can be used for direct electrowinning. The optimum operating conditions are: pH=9~11, ρ (EDA)=40 g/L, ammonium sulfate 50 g/L, leaching time 5 h(for natural sample) and 2.5 h(for synthetic sludge), liquid to solid ratio being 4 with mechanical stirring at room temperature. 展开更多
关键词 乙二胺 酸性污泥 废物处理 选择性提取
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Influence of Fly Ash and Sewage Sludge Application on Cadmium and Lead Sorption by an Acidic Alfisol 被引量:6
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作者 S.M.SHAHEEN C.D.TSADILAS 《Pedosphere》 SCIE CAS CSCD 2010年第4期436-445,共10页
The safe recycling of fly ash (FA) and sewage sludge (SS) in the agricultural processes comprises an important environmental technology on waste management. Soils amended with FA and SS may change their ability to ads... The safe recycling of fly ash (FA) and sewage sludge (SS) in the agricultural processes comprises an important environmental technology on waste management. Soils amended with FA and SS may change their ability to adsorb heavy metals due to either increase of soil pH or decomposition of sludge-borne organic matter. Thus, Cd and Pb sorption was investigated by 1-month incubation under soil moisture content at field capacity and room temperature with an acidic Typic Haploxeroalf from central Greece amended with varying amounts of FA and SS. Batch experiments were conducted by equilibrating the soil samples with CaCl2 solutions containing 0-400 mg Pb L-1 or 0-100 mg Cd L-1. The results showed that the Freundlich equation described well the Cd and Pb sorption. Distribution coefficient (Kd) values of Pb were higher than those of Cd in all the treatments of this study. Application of FA increased Kd values for Cd and Pb to 8.2 and 2.3 times more than the controls, respectively. Simultaneous applications of FA and SS caused a Kd increase of 3.8 and 2.1 times compared to the treatments that received only SS for Cd and Pb, respectively. Treatment of SS alone did not significantly change Cd and Pb sorption compared to the controls. The sorption reactions seemed to be mainly affected by soil pH, which was revealed by the significant correlations of Cd and Pb sorption with soil pH. These suggested that fly ash was very useful as a low-cost adsorbent for Cd and Pb and could be used as an ameliorant for biosolid-amended acidic soils. 展开更多
关键词 ameliorant distribution coefficient Freundlich equation heavy metals soil pH
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Effects of Composted and Thermally Dried Sewage Sludges on Soil and Soil Humic Acid Properties 被引量:6
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作者 J. M. FERNNDEZ N. SENESI +2 位作者 C. PLAZA G. BRUNETTI A. POLO 《Pedosphere》 SCIE CAS CSCD 2009年第3期281-291,共11页
The effect of annual additions of composted sewage sludge (CS) and thermally dried sewage sludge (TS) at 80 t ha-1 on soil chemical properties was investigated for three years in a field experiment under semiarid cond... The effect of annual additions of composted sewage sludge (CS) and thermally dried sewage sludge (TS) at 80 t ha-1 on soil chemical properties was investigated for three years in a field experiment under semiarid conditions. Humic acids (HAs) isolated by conventional procedures from CS, TS, and unamended (SO) and sludge amended soils were analysed for elemental (C, H, N, S and O) and acidic functional groups (carboxylic and phenolic) and by ultraviolet-visible, Fourier transform infrared and fluorescence spectroscopies. With respect to CS, TS had similar pH and total P and K contents, larger dry matter, total organic C, total N and C/N ratio and smaller ash content and electrical conductivity. Amendment with both CS and TS induced a number of modifications in soil properties, including an increase of pH, electrical conductivity, total organic C, total N, and available P. The CS-HA had greater O, total acidity, carboxyl, and phenolic OH group contents and smaller C and H contents than TS-HA. The CS-HA and TS-HA had larger N and S contents, smaller C, O and acidic functional group contents, and lower aromatic polycondensation and humification degrees than SO-HA. Amended soil-HAs showed C, H, N and S contents larger than SO-HA, suggesting that sludge HAs were partially incorporated into soil HAs. These effects were more evident with increasing number of sludge applications. 展开更多
关键词 elemental composition fluorescence spectroscopy Fourier transform infrared spectroscopy functional group composition
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Adsorption of acid and basic dyes by sludge-based activated carbon:Isotherm and kinetic studies 被引量:3
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作者 李鑫 王广智 +2 位作者 李伟光 王萍 宿程远 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第1期103-113,共11页
A batch experiment was conducted to investigate the adsorption of an acid dye(Acid Orange 51) and a basic dye(Safranine) from aqueous solutions by the sludge-based activated carbon(SBAC). The results show that the ads... A batch experiment was conducted to investigate the adsorption of an acid dye(Acid Orange 51) and a basic dye(Safranine) from aqueous solutions by the sludge-based activated carbon(SBAC). The results show that the adsorption of Acid Orange 51 decreases at high p H values, whereas the uptake of Safranine is higher in neutral and alkaline solutions than that in acidic conditions. The adsorption time needed for Safranine to reach equilibrium is shorter than that for Acid Orange 51. The uptakes of the dyes both increase with temperature increasing, indicating that the adsorption process of the dyes onto SBAC is endothermic. The equilibrium data of the dyes are both best represented by the Redlich-Peterson model. At 25 °C, the maximum adsorption capacities of SBAC for Acid Orange 51 and Safranine are 248.70 mg/g and 525.84 mg/g, respectively. The Elovich model is found to best describe the adsorption process of both dyes, indicating that the rate-limiting step involves the chemisorption. It can be concluded that SBAC is a promising material for the removal of Acid Orange 51 and Safranine from aqueous solutions. 展开更多
关键词 sludge-based activated carbon Acid Orange 51 Safranine adsorption isotherms kinetics
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Effects of Nitrate Concentration in Main Anoxic Zone on Denitrifying Dephosphatation 被引量:1
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作者 尹军 王晓玲 +2 位作者 祝贵兵 叶龙 吴相会 《Journal of Donghua University(English Edition)》 EI CAS 2009年第4期443-449,共7页
The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town (MUCT) process. Meanwhile the relation between optimal... The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town (MUCT) process. Meanwhile the relation between optimal nitrate concentration (Nopt) and influent C/N ratio was evaluated, in which the influont chemical oxygen demand (COD) concentration was stabilized at (2905:10)mg/L, the influent total phosphorus (TP) concentration was stabilized at (7.0±0. 5)mg/L. The results indicated that: (1) the nitrate concentration in the main anoxic zone had an effect on denitrifying dephosphatation capability, and the average percentages of anoxic phosphorus uptake in total phosphorus uptake (ηa) increased with nitrate cancentration increasing, i.e., increasing from 62.1% at2.0 mg/L to63.7%, 65.6%, 68.1%, and 72.3% at 2.2, 2.4, 2.6 and 2.8mg/L, respectively; (2) the Nopt as function of influent C/N ratio could be calculated by the equation: y = 0.67x^2-7.79x + 22. 21; the maximum percentages of anoxic phosphorus uptake in total phosphorus uptake (ηa,max) as function of the Nopt could be calculated by the equation: y=0.77-0.33e^-(x/1.52). The Nopt was the important control parameter that must be optimized for operation of conveational biological nutrieat removal activated sludge (BNRAS) system. 展开更多
关键词 MUCT process denitri fying de phosphatation nitrate concentration anoxic phosphorus uptake
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Storage and Subsequent Reactivation of Phosphate-Accumulating Aerobic Granules
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作者 黄宇 赵林 +2 位作者 谭欣 董涛 李金娟 《Transactions of Tianjin University》 EI CAS 2011年第3期187-193,共7页
Phosphate-accumulating aerobic granules cultivated in a sequencing batch reactor were composed of inner rod-shaped bacteria aggregates and outer twining filamentous bacteria. The influence of two-month storage under d... Phosphate-accumulating aerobic granules cultivated in a sequencing batch reactor were composed of inner rod-shaped bacteria aggregates and outer twining filamentous bacteria. The influence of two-month storage under dif- ferent conditions on the storage and subsequent reactivation performance of aerobic granules was investigated. After two-month storage the granules sealed at 4 ~C in distilled water or normal saline (named granules A and granules B, respectively) could maintain their characteristics as before, while the granules idled in the reactor at room temperature (named granules C) exhibited decreased properties. During reactivation, granules A and granules B presented almost identical recovery performance, faster than granules C, in terms of phosphorus removal efficiency, mixed liquor sus- pended solids (MLSS), phosphate release and accumulating ability. The results suggest that hermetical storage at low temperature promoted the maintenance of the granular properties and the reviving behaviors of phosphateaccumulating aerobic granules, and storage medium had little influence on the storage and recovery perfomlance. 展开更多
关键词 phosphate-accumulating aerobic granules STORAGE REACTIVATION granular structure
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Completely Autotrophic Nitrogen-removal over Nitrite in Two Types of Reactors
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作者 郑雪松 杨虹 +1 位作者 李道棠 王鹏 《Journal of Donghua University(English Edition)》 EI CAS 2005年第4期29-32,共4页
Two lab-scale reactors, suspended-sludge and fluidized.bed, were conducted with the feed of ammonium-rich synthetic wastewater devoid of COD. Completely autotrophic nitrogen-removal process was fulfilled in both react... Two lab-scale reactors, suspended-sludge and fluidized.bed, were conducted with the feed of ammonium-rich synthetic wastewater devoid of COD. Completely autotrophic nitrogen-removal process was fulfilled in both reactors and the maximum efficiencies of nitrogen removal were achieved, 65% in the suspended-sludge reactor and 73% in the fluidized-bed reactor respectively. Different from the steady performance of the fluldized-bed reactor, the suspended-sludge reactor came to deteriorate constantly after a period of stable operation, resulting in almost complete loss of the N-removal ability in the suspending system. Molecular methods such as PCR and FISH were employed for describing the microbial characteristics in two systems. This study suggests that a biofllm system is a suitable configuration for completely autotrophic N-removal with more feasibility and stability than a suspending system. 展开更多
关键词 nitrogen-removal ammonium-rich wastewater activated sludge FISH(Fluorescent In Situ Hybridization).
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The Effect of Non-acidified Wastewater on Expanded Granular Sludge Bed (EGSB) Reactors Performance
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作者 Ton That Lang Salih Rebac 《Journal of Environmental Science and Engineering(A)》 2017年第5期243-248,共6页
The textile processing plants utilize a wide variety of dyes and other chemicals such as acids, bases, salts, detergents, sizes, oxidants, mercerizing and finishing chemicals. Many of these are not retained in the fin... The textile processing plants utilize a wide variety of dyes and other chemicals such as acids, bases, salts, detergents, sizes, oxidants, mercerizing and finishing chemicals. Many of these are not retained in the final product and are discharged in the effluent. Therefore, the objective of this study was to assess the performance of EGSB (Expanded Granular Sludge Bed) reactor to treat non-acidifie wastewater. Several experiments using starch and volatile fatty acids as model substrates were conducted. The problems of piston formation were evaluated at a variety of relevant operational conditions, such as substrate concentration, organic and hydraulic loading rates. The results showed that newly grown acidogenic biomass diluted original methanogenic biomass and the granular sludge in the EGSB reactor deteriorated. The piston formation in the EGSB reactor that was fed with non-acidified wastewater occurred due to high growth of acidogenic biomass and high upflow velocity applied in the system. 展开更多
关键词 Non-acidified wastewater starch wastewater EGSB (Expanded Granular Sludge Bed).
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AMD污泥复合材料吸附As(Ⅴ)的机制及其影响因素 被引量:3
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作者 张亚辉 张瑞雪 +5 位作者 吴攀 陈世万 杨艳 安丽 傅渝然 张予豪 《环境科学》 EI CAS CSCD 北大核心 2022年第5期2673-2684,共12页
污泥基吸附剂被广泛用于水和土壤中各种污染物的治理,是资源化利用的有效途径.以酸性矿山废水(AMD)污泥为骨料,玉米秸秆为还原剂,膨润土为载体,采用固相还原法制备污泥复合材料,并比较了不同原料配比和不同煅烧温度制备的复合材料吸附As... 污泥基吸附剂被广泛用于水和土壤中各种污染物的治理,是资源化利用的有效途径.以酸性矿山废水(AMD)污泥为骨料,玉米秸秆为还原剂,膨润土为载体,采用固相还原法制备污泥复合材料,并比较了不同原料配比和不同煅烧温度制备的复合材料吸附As(Ⅴ)的性能,探究了溶液pH、吸附剂投加量和竞争离子等对材料吸附As(Ⅴ)的影响,使用SEM-EDS、XRD、FT-IR、BET和XPS等分析技术对材料性能进行表征,探讨其吸附机制.结果表明,在900℃时AMD污泥∶玉米秸秆∶膨润土=2∶1∶1制备出的材料吸附As(Ⅴ)效果最好,材料表面生成大量Fe_(3)O_(4)、Fe_(2)O_(3)和Fe^(0)颗粒.该材料对As(Ⅴ)的吸附符合准二级动力学模型和Freundlich吸附等温模型,最大吸附容量为164.5mg·g^(-1),比原始AMD污泥提高了4.4倍.静电吸附、含氧官能团络合作用、铁氧化层的吸附和Fe0释放出Fe^(2+)/Fe^(3+)形成Fe(OH)_(2)/Fe(OH)_(3),与砷酸盐的共沉淀等是复合材料吸附As(Ⅴ)的主要作用机制. 展开更多
关键词 酸性矿山废水污泥 复合材料 吸附去除 As(Ⅴ) 作用机制
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Biochar:An Emerging Panacea for Remediation of Soil Contaminants from Mining,Industry and Sewage Wastes 被引量:15
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作者 Hossain M.ANAWAR Farjana AKTER +1 位作者 Zakaria M.SOLAIMAN Vladimir STREZOV 《Pedosphere》 SCIE CAS CSCD 2015年第5期654-665,共12页
Mine tailings, waste rock piles, acid mine drainage, industrial wastewater, and sewage sludge have contaminated a vast area of cultivable and fallow lands, with a consequence of deterioration of soil and water quality... Mine tailings, waste rock piles, acid mine drainage, industrial wastewater, and sewage sludge have contaminated a vast area of cultivable and fallow lands, with a consequence of deterioration of soil and water quality and watercourses due to the erosion of contaminated soils for absence of vegetative cover. High concentrations of toxic elements, organic contaminants, acidic soils, and harsh climatic conditions have made it difficult to re-establish vegetation and produce crops there. Recently, a significant body of work has focussed on the suitability and potentiality of biochar as a soil remediation tool that increases seed emergence, soil and crop productivity, above ground biomass, and vegetation cover on mine tailings, waste rock piles, and industrial and sewage waste- contaminated soils by increasing soil nutrients and water-holding capacity, amelioration of soil acidity, and stimulation of microbial diversity and functions. This review addresses: i) the functional properties of biochar, and microbial cycling of nutrients in soil; ii) bioremediation, especially phytoremediation of mine railings, industrial waste, sewage sludge, and contaminated soil using biochar; iii) impact of biochar on reduction of acid production, acid mine drainage treatment, and geochemical dynamics in mine railings; and iv) treatment of metal and organic contaminants in soils using biochar, and restoration of degraded land. 展开更多
关键词 acid mine drainage contaminated soil interaction mine railings mining waste PHYTOREMEDIATION PHYTOSTABILIZATION REVEGETATION
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