| 引用本文: | 于劲磊,蒋国斌,周鑫,李冀川,赵靓,蒙恬. 钻屑残渣制备沥青路面面层重金属释放特征研究[J]. 石油与天然气化工, 2023, 52(1): 131-137. |
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| 钻屑残渣制备沥青路面面层重金属释放特征研究 |
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于劲磊1,2,蒋国斌1,2,周鑫3,李冀川1,2,赵靓1,2,蒙恬1,2
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1.中国石油西南油气田公司安全环保与技术监督研究院;2.页岩气评价与开采四川省重点实验室 ;3.国家管网集团西南管道有限责任公司建设项目管理中心
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| 摘要: |
| 目的 为进一步拓宽油基岩屑脱油残渣资源化利用途径,采用脱油残渣、矿粉、碎石等为原料,进行脱油残渣制备沥青路面可行性研究。方法 采用JTG/T F40-2004《公路沥青路面施工技术规范》、GB/T 30810-2014《水泥胶砂中可浸出重金属的测定方法》和EA NEN 7375-2004《模制或整体式块状材料的浸出特性标准》方法,考查了剩余固相替代矿粉制备的沥青面层试块的产品质量,分析了沥青面层重金属有效释放量和释放特性。结果 当剩余固相掺加量不高于4.8%(质量分数)时,制备出的沥青路面面层试块各项性能指标均符合JTG/T F40-2004要求。沥青面层试块浸出液中11种重金属(砷、钡、钴、铜、铬、锰、钼、镍、铅、钒、锌)释放率均低于1%。沥青面层试块中各重金属释放机理具有差异,其中砷、铬的释放机理主要为溶解作用,钡、钴、锰、镍、铅的释放机理主要为表面冲刷,剩余重金属受到扩散作用控制,且各重金属释放速率呈现钡＜钴＜锌＜锰＜镍＜铬＜砷＜铅＜铜的规律。结论 油基岩屑脱油残渣可替代矿粉,用于制备沥青面层试块,制备的沥青面层试块重金属迁移污染地下水环境风险较低。建议产废企业联合道路建设行业共同制定油基岩屑脱油残渣制备沥青混合料产品质量标准及其污染控制要求,推动油基岩屑脱油残渣在公路建设行业的推广应用。 |
| 关键词: 油基岩屑 脱油残渣 沥青面层 重金属 有效释放量 累计释放量 扩散系数 释放速率 |
| DOI：10.3969/j.issn.1007-3426.2023.01.021 |
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| 基金项目:中国石油天然气股份有限公司西南油气田公司科技项目“聚磺体系泥浆钻井废物组分特征分析及利用处置技术研究”(20220307-04) |
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| Study of heavy metal release characteristics of asphalt pavement surface prepared by drilling residue |
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Yu Jinlei1,2, Jiang Guobin1,2, Zhou Xin3, Li Jichuan1,2, Zhao Liang1,2, Meng Tian1,2
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1. Safety, Environment and Technology Supervision Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;2. Sichuan Key Laboratory of Evaluation and Exploitation of Shale Gas, Chengdu, Sichuan, China;3. Construction Project Management Center, PipeChina Southwest Pipeline Co., Ltd, Chengdu, Sichuan, China
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| Abstract: |
| Objective In order to further promote the resource utilization of oil-based rock debris deoiling residue, the feasibility of preparing asphalt pavement from deoiling residue is studied by using deoiling residue, mineral powder and gravel as raw materials. Methods JTG/T F40-2004 Technical specification for construction of highway asphalt pavement, GB/T 30810-2014 Method for determination of leachable heavy metals in cement mortar and EA NEN 7375-2004 Standard for leaching characteristics of molded or integral block materials were used to investigate the product quality of asphalt surface test blocks prepared by replacing mineral powder with residual solid phase, and the effective releasable amount and releasing characteristics of heavy metals in asphalt surface were analyzed. Results The performance of the prepared asphalt pavement surface test block could meet the requirements of JTG/T F40-2004 when the content of residual solid phase is not higher than 4.8% (mass fraction). The releasing rates of 11 heavy metals (arsenic, barium, cobalt, copper, chromium, manganese, molybdenum, nickel, lead, vanadium and zinc) in the leaching solution of asphalt surface test block were less than 1%. The releasing mechanism of each heavy metal in the asphalt surface test block is different. The releasing mechanism of arsenic and chromium is mainly due to dissolution and the release mechanism of barium, cobalt, manganese, nickel and lead is mainly ascribed to surface scouring while the remaining heavy metals are controlled by diffusion. The releasing rate of each heavy metal was in the following order: bariumConclusion sThe deoiling residue of oil-based rock cuttings can replace mineral powder to prepare asphalt surface test block. The prepared asphalt surface test block has a low risk of groundwater environment contamination caused by the migration of heavy metals. It is suggested that waste generation enterprises and the road construction industry could jointly formulate the product quality standard and pollution control requirements for the preparation of asphalt mixture from oil-based rock debris deoiling residue, so as to promote the popularization and application of oil-based rock debris deoiling residue in the road construction industry. |
| Key words: oil-based cuttings deoiling residue asphalt surface heavy metal effective release cumulative release diffusion coefficient release rate |
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