Groundwater is considered as the primary source of drinking water in many countries around the world. For maintaining resource sustainability, clean and safe groundwater is a priority for water authorities worldwide. Unfortunately, groundwater resources are susceptible to various types of pollution, with arsenic (As) being a major pollutant in certain areas due to natural or anthropogenic activities. Due to its adverse health effects, As, a class-1 carcinogen, has been a topic of intense research. The technical difficulty and high cost incurred by conventional treatment systems for As removal have led many researchers to work on developing efficient, eco-friendly, and cost-effective technologies for the treatment of groundwater sources. Biochar has been widely used as an adsorbent for the decontamination of groundwater. High As removal rates have been achieved following metal (Fe, Zn, Mn) impregnation and magnetic modification to biochar. Despite numerous researches on biochar for As removal, very limited efforts have been made for upscaling to a convenient treatment system. Thus, this review highlights key findings of previous studies required for pragmatic applications. Following up with future trends, an overview is given on real-time monitoring techniques that can be combined with biochar for evaluating adsorption studies. Furthermore, research opportunities that exist in biochar adsorption studies have also been identified. This technical review is aimed for scientists, scholars and researchers as a supplementary guide for understanding As decontamination processes, highlighting the role of biochar as an adsorbent and conceptualizing the prospects of integration of real-time monitoring techniques.

在世界许多国家，地下水被认为是饮用水的主要来源。为了维持资源的可持续性，清洁和安全的地下水是全球水务部门的首要任务。不幸的是，地下水资源容易受到各种类型的污染，由于自然或人为活动，砷在某些地区是主要污染物。由于其对健康的不利影响，As，一种致癌物，一直是研究的热点。传统的砷去除处理系统的技术难度和高昂的成本，导致许多研究人员致力于开发高效，生态友好和具有成本效益的技术来处理地下水源。生物炭已被广泛用作地下水净化的吸附剂。在金属（Fe，Zn，Mn）浸渍和对生物炭进行磁性改性后，已达到较高的As去除率。尽管对去除生物炭的砷进行了大量研究，但为将其升级为方便的处理系统所做的努力非常有限。因此，本综述重点介绍了务实应用所需的先前研究的主要发现。跟进未来趋势，概述了可以与生物炭结合用于评估吸附研究的实时监测技术。此外，还发现了生物炭吸附研究中存在的研究机会。本技术评论面向科学家，学者和研究人员，作为理解除污过程的补充指南，