摘要
在全球气候变暖日益严峻背景下,我国提出了“双碳”目标,积极推行节能降碳与可持续发展战略.污水处理作为能源密集型行业,在节能、减碳和资源再利用等方面面临着新的挑战.目前评估污水处理厂碳足迹核算方法已初步建立.随着研究不断深入,人们已意识到污水处理厂中由化石碳产生的CO_(2)直接排放量在总碳排放量中的份额不容忽视,应纳入污水处理厂CO_(2)直接排放清单.化石碳因衰变作用而几乎不含^(14)C,因此,检测有机物化石碳成分通常用^(14)C同位素检测方法实施.然而,因^(14)C自然丰度低、前处理严格、仪器昂贵、操作复杂等问题,使得无论是液体闪烁计数器-^(14)C(LSC-^(14)C)还是加速器质谱仪-^(14)C(AMs^(-1)4C)检测法均难以普及到污水处理.因此,另辟蹊径乃当务之急.尝试对有机物转化为CO_(2)气体中的13C进行检测,并根据排泄物与石油类物质中13C丰度差异反推污水有机物化石碳成分或许能简化问题,有望建立起一套完整、高效、经济的污水有机物化石碳检测方法.
Under the background of severe global warming,the strategy of“carbon peaking and carbon neutrality”has been raised in China.As an energy-intensive sector,wastewater treatment plants(WWTPs)are facing some new challenges in reducing carbon,saving energy and reusing materials.The carbon accounting methods have been established to evaluate carbon emissions from WWTPs.Along with some penetrative studies,the direct CO_(2)emission generated from fossil carbon is thought to be unneglected,which should be listed in the total carbon emissions.Fossil carbon contains a negligible amount of^(14)C due to radioactive decay.For the reason,the fossil carbon content in organic matter is generally assessed detecting^(14)C.However,^(14)C is low in natural abundance,strict in pretreatment,expensive in equipment and complicated in operation,which makes both LSC-^(14)C and AMs^(-1)4C detecting methods difficultly popularized in wastewater treatment.Thus,exploring some alternatives is an urgent matter.Among them,detecting 13C in CO_(2)converted from total organic matters,associated with the abundance difference of 13C on excrement and petroleum,could make the problem simplified,which is expected to establish a systemic,efficient,and cost-effective method detecting fossil carbon of organic matter in wastewater.
作者
郝晓地
邸文馨
朱洋墨
于文波
HAO Xiaodi;DI Wenxin;ZHU Yangmo;YU Wenbo(Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies,Key Laboratory of Urban Stormwater System and Water Environment(Ministry of Education),Beijing University of Civil Engineering and Architecture,Beijing 100044)
出处
《环境科学学报》
北大核心
2025年第3期295-305,共11页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.52170018)。
